CN114624037B - Cab load extraction method and device - Google Patents
Cab load extraction method and device Download PDFInfo
- Publication number
- CN114624037B CN114624037B CN202210526928.8A CN202210526928A CN114624037B CN 114624037 B CN114624037 B CN 114624037B CN 202210526928 A CN202210526928 A CN 202210526928A CN 114624037 B CN114624037 B CN 114624037B
- Authority
- CN
- China
- Prior art keywords
- spectrum
- cab
- load
- time domain
- stabilizer bar
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M17/00—Testing of vehicles
- G01M17/007—Wheeled or endless-tracked vehicles
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Vehicle Body Suspensions (AREA)
Abstract
The disclosure provides a cab load extraction method and device, and relates to the technical field of automobiles. The method comprises the following steps: obtaining the suspension of a cab and the mechanical property calibrated by a stabilizer bar; acquiring a time domain displacement spectrum suspending each position and a time domain strain spectrum of the stabilizer bar; and determining a fatigue analysis load spectrum of the cab based on the mechanical property, the time domain displacement spectrum and the time domain strain spectrum. According to the method, the sample piece is calibrated, the time domain displacement spectrum and the time domain strain spectrum are collected, the full-floating cab load with the stabilizer bar is extracted, and the correlation between the full-floating cab fatigue analysis load with the stabilizer bar and a test field can be guaranteed, so that the accuracy of calculation of the full-floating cab fatigue analysis load spectrum with the stabilizer bar is improved, meanwhile, a complex multi-body dynamic model is avoided being established, and the load extraction efficiency is improved.
Description
Technical Field
The disclosure relates to the technical field of automobiles, in particular to a method and a device for extracting load of a cab.
Background
The fatigue life of the cab has obvious influence on the quality of the whole vehicle, and the accuracy of the load has important influence on the accuracy of a fatigue life analysis result when the fatigue life is analyzed.
In the related art, the extraction precision of the load of the cab is low, and the fatigue analysis of the whole vehicle is not used.
Disclosure of Invention
The technical problem to be solved by the present disclosure is to provide a method and a device for extracting a cab load, which improve the accuracy of calculating a fatigue analysis load spectrum of a full-floating cab with a stabilizer bar.
According to an aspect of the present disclosure, a cab load extraction method is provided, including: obtaining the mechanical properties of the suspension of the cab and the calibration of the stabilizer bar; acquiring a time domain displacement spectrum suspending each position and a time domain strain spectrum of the stabilizer bar; and determining a fatigue analysis load spectrum of the cab based on the mechanical property, the time domain displacement spectrum and the time domain strain spectrum.
In some embodiments, obtaining suspension and stabilizer bar calibrated mechanical properties of the cab comprises: a first function relation of the elastic force and the displacement of an elastic element in a sample piece used for each position of the suspension of the cab, a second function relation of the damping force and the speed of a damper and a third function relation of the connecting arm force and the strain of a stabilizing rod are obtained.
In some embodiments, a time domain velocity spectrum of the corresponding position of the suspension is obtained from the time domain displacement spectrum, wherein determining the cab fatigue analysis load spectrum comprises: and determining a fatigue analysis load spectrum of the cab based on the first functional relation, the second functional relation, the third functional relation, the time domain displacement spectrum, the time domain strain spectrum and the time domain speed spectrum.
In some embodiments, the cab fatigue analysis load spectrum includes the load at each position of suspension, and the load at the position where the connecting arm of the stabilizer bar is connected to the cab.
In some embodiments, determining the load for each position of the suspension comprises: obtaining elastic force at each position based on the first function relation and the time domain displacement spectrum at each position; obtaining a damping force at each position based on the second function relation and the time domain velocity spectrum at each position; and adding the elastic force at each position and the damping force at the corresponding position to obtain the load at each position.
In some embodiments, the load determining the connection position of the connection arm of the stabilizer bar with the cab includes: and obtaining the mutual acting force of the connecting arm of the stabilizer bar and the connecting position of the cab based on the third functional relation and the time domain strain spectrum of the stabilizer bar.
In some embodiments, the time domain displacement spectrum is the sum of the displacement of the elastic element at the static equilibrium of the cab and the displacement of the elastic element when the vehicle is running.
In some embodiments, fatigue analysis is performed based on the cab fatigue analysis load spectrum to obtain the fatigue damage hot spot region and the fatigue life of the cab.
According to another aspect of the present disclosure, there is also provided a cab load extracting apparatus including: the sample calibration acquisition unit is configured to acquire the suspension of the cab and the mechanical property calibrated by the stabilizer bar; a road spectrum data acquisition unit configured to acquire a time domain displacement spectrum suspending each position and a time domain strain spectrum of the stabilizer bar; and a load spectrum analysis unit configured to determine a cab fatigue analysis load spectrum based on the mechanical property, the time domain displacement spectrum and the time domain strain spectrum.
In some embodiments, the sample calibration acquiring unit is configured to acquire a first functional relationship of an elastic force and a displacement of the elastic element in the sample for each position of suspension of the cab, a second functional relationship of a damping force and a velocity of the damper, and a third functional relationship of a connecting arm force and a strain of the stabilizer bar.
In some embodiments, the road spectrum data obtaining unit is further configured to obtain a time domain velocity spectrum of the suspension corresponding position according to the time domain displacement spectrum; and the load spectrum analysis unit is configured to determine a cab fatigue analysis load spectrum based on the first functional relationship, the second functional relationship, the third functional relationship, the time-domain displacement spectrum, the time-domain strain spectrum, and the time-domain velocity spectrum.
In some embodiments, the cab fatigue analysis load spectrum includes the load at each position of suspension, and the load at the position where the connecting arm of the stabilizer bar is connected to the cab.
In some embodiments, the load spectrum analysis unit is configured to derive the elastic force at each location based on the first functional relationship and the time-domain displacement spectrum at each location; obtaining a damping force at each position based on the second function relation and the time domain velocity spectrum at each position; and adding the elastic force at each position and the damping force at the corresponding position to obtain the load at each position.
In some embodiments, the load spectrum analysis unit is configured to derive an interaction force of the connecting arm of the stabilizer bar with the cab connection position based on the third functional relationship and the time-domain strain spectrum of the stabilizer bar.
In some embodiments, the time domain displacement spectrum is the sum of the displacement of the elastic element at the static equilibrium of the cab and the displacement of the elastic element while the vehicle is running.
In some embodiments, the cab load extraction device further comprises: and the fatigue analysis unit is configured to perform fatigue analysis based on the cab fatigue analysis load spectrum to obtain a fatigue damage hot spot region and a fatigue life of the cab.
According to another aspect of the present disclosure, there is also provided a cab load extracting apparatus including: a memory; and a processor coupled to the memory, the processor configured to perform the cab load extraction method as described above based on instructions stored in the memory.
According to another aspect of the present disclosure, a non-transitory computer-readable storage medium is also presented, having stored thereon computer program instructions, which when executed by a processor, implement the cab load extraction method described above.
In the embodiment of the disclosure, the sample is calibrated, the time domain displacement spectrum and the time domain strain spectrum are collected, the load of the full-floating cab with the stabilizer bar is extracted, and the correlation between the fatigue analysis load of the full-floating cab with the stabilizer bar and a test field can be ensured, so that the accuracy of the calculation of the fatigue analysis load spectrum of the full-floating cab with the stabilizer bar is improved, meanwhile, the establishment of a complex multi-body dynamic model is avoided, and the load extraction efficiency is improved.
Other features of the present disclosure and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description, serve to explain the principles of the disclosure.
The present disclosure may be more clearly understood from the following detailed description, taken with reference to the accompanying drawings, in which:
FIG. 1 is a schematic flow diagram of some embodiments of a cab load extraction method of the present disclosure;
FIG. 2 is a schematic flow diagram of further embodiments of a cab load extraction method of the present disclosure;
FIG. 3 is a schematic flow chart diagram of other embodiments of a cab load extraction method of the present disclosure;
FIG. 4 is a schematic diagram illustrating a calibration relationship of force versus displacement curves for a spring according to the present disclosure;
FIG. 5 is a schematic illustration of a calibration relationship of force versus velocity curves for the damper of the present disclosure;
FIG. 6 is a graphical illustration of a calibration relationship of stabilizer bar force versus strain curves according to the present disclosure;
FIG. 7 is a stabilizer bar mounting schematic of the present disclosure;
FIG. 8 is a schematic view of the installation of a sensor of the present disclosure;
FIG. 9 is a schematic view of a data processing interface of the present disclosure;
FIG. 10 is a schematic view of an interface for calculating a load spectrum at various locations according to the present disclosure;
FIG. 11 is a schematic structural view of some embodiments of a cab load extraction device of the present disclosure;
FIG. 12 is a schematic structural view of further embodiments of cab load extraction devices of the present disclosure; and
fig. 13 is a schematic structural view of further embodiments of the cab load extraction device of the present disclosure.
Detailed Description
Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present disclosure unless specifically stated otherwise.
Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the disclosure, its application, or uses.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
For the purpose of promoting a better understanding of the objects, aspects and advantages of the present disclosure, reference is made to the following detailed description taken in conjunction with the accompanying drawings.
The transverse stabilizer bar left and right trailing arm end points of the full-floating cab are connected with the cab through bushings, and when the left and right jumping quantities of the connecting point of the transverse stabilizer bar and the cab are different, the stabilizer bar generates torsional deformation to resist the expansion of the left and right jumping quantities of the cab. In analyzing the fatigue life of the cab, attention should be paid to the load at the connection of the stabilizer bar and the cab, in addition to the load suspended in the front and rear of the cab. However, in the related art, the load at this position is not taken into consideration.
Fig. 1 is a schematic flow diagram of some embodiments of a cab load extraction method of the present disclosure.
In step 110, the suspension of the cab and the calibrated mechanical properties of the stabilizer bar are obtained.
In some embodiments, the cab is a full-floating cab, for example, a suspension system is formed by four sets of elastic elements, namely a front set, a rear set, a left set and a right set, so that the cab is suspended above the frame.
In some embodiments, the mechanical properties calibrated by the suspension include a first function of the elastic force of the elastic element in the sample piece used for each position of the suspension and a second function of the damping force of the damper and the velocity.
In some embodiments, the resilient element is a spring and the damper is a shock absorber. The springs and dampers should reach maximum travel when the sample is calibrated.
In some embodiments, the mechanical properties of the stabilizer bar calibration include a third function of the stabilizer bar link arm force versus strain. The stabilizer bar should not be plastically strained when the sample is calibrated.
At step 120, a time domain displacement spectrum for each position of the suspension and a time domain strain spectrum for the stabilizer bar are obtained.
In some embodiments, the time domain strain spectrum is subjected to deburring, filtering, drift elimination and other operations, so that the precision of subsequent data processing is improved.
In some embodiments, from the time-domain displacement spectrum, a time-domain velocity spectrum of the corresponding location of the suspension is derived. For example, the time domain displacement spectrum is differentiated to obtain a time domain velocity spectrum of the suspension motion.
In some embodiments, the time domain displacement spectrum is the sum of the displacement of the elastic element at the static equilibrium of the cab and the displacement of the elastic element while the vehicle is traveling.
At step 130, a cab fatigue analysis load spectrum is determined based on the mechanical properties, the time domain displacement spectrum, and the time domain strain spectrum.
In some embodiments, the cab fatigue analysis load spectrum is determined based on the first functional relationship, the second functional relationship, the third functional relationship, the time domain displacement spectrum, the time domain strain spectrum, and the time domain velocity spectrum.
In some embodiments, the cab fatigue analysis load spectrum includes the load at each position of suspension, and the load at the position where the connecting arm of the stabilizer bar is connected to the cab.
In some embodiments, the elastic force at each location is derived based on the first functional relationship and the time domain displacement spectrum at each location; obtaining a damping force at each position based on the second function relation and the time domain velocity spectrum at each position; and adding the elastic force at each position and the damping force at the corresponding position to obtain the load at each position.
For example, the stress of the spring is obtained according to the functional relationship of the mechanical properties of the four springs obtained by test calibration and the time domain displacement spectrum obtained after the test. And obtaining the stress of the damper according to the functional relation of the mechanical properties of the four dampers and the time domain velocity spectrum obtained after the test. And (3) the stress of the spring and the stress of the damper at the same position are used for obtaining the suspended load of the cab at the position.
In some embodiments, the interaction force of the connecting arm of the stabilizer bar with the cab connection location is derived based on the third functional relationship and the time-domain strain spectrum of the stabilizer bar.
For example, according to the relationship between strain and force obtained by calibrating the stabilizer bar and a time domain strain spectrum, the interaction force between the stabilizer bar and the cab is calculated, and then a time domain load spectrum of the connection position of the cab and the stabilizer bar connection arm is obtained.
In the embodiment, the sample is calibrated, the time domain displacement spectrum and the time domain strain spectrum are collected, the load of the full-floating cab with the stabilizer bar is extracted, and the correlation between the fatigue analysis load of the full-floating cab with the stabilizer bar and a test field can be ensured, so that the accuracy of the calculation of the fatigue analysis load spectrum of the full-floating cab with the stabilizer bar is improved, meanwhile, the establishment of a complex multi-body dynamic model is avoided, and the load extraction efficiency is improved.
The process of calculating the cab fatigue analysis load spectrum is shown in fig. 2, and will be described below by taking a specific embodiment as an example.
Fig. 3 is a schematic flow diagram of further embodiments of a cab load extraction method of the present disclosure.
At step 310, the sample is calibrated.
In some embodiments, the test measures the pull pressure versus displacement of a spring in a sample for cab suspension, the damping force versus velocity of a damper, and the force versus strain of a stabilizer link arm in a stabilizer bar. The calibration relationship of the force versus displacement curves of the four suspension springs is shown in fig. 4, the calibration relationship of the force versus velocity curves of the four suspension dampers is shown in fig. 5, and the calibration relationship of the stabilizer bar force versus strain curve is shown in fig. 6.
When the spring is calibrated, the test displacement of the spring reaches the upper limit and the lower limit of a design value, and a spring force and displacement relation function Fu = K (u) is obtained. When the damper is calibrated, the speed is from-400 mm/s to 400mm/s, and the relation Fd = D (v) of the damping force and the speed is obtained. When calibrating the stabilizer bar, as shown in fig. 7, the left and right stabilizer bar supports are fixedly connected with the ground, the left stabilizer bar connecting arm is fixedly connected with the ground through a pin and a connecting rod, a load perpendicular to the stabilizer bar and the plane where the stabilizer bar connecting arm is located is applied to the right stabilizer bar connecting arm, the strain gauge is adhered to the middle position of the stabilizer bar, and the strain gauge is adhered around the annular direction of the stabilizer bar. During calibration, the applied force cannot plastically deform the stabilizer bar, and the relationship Fa = e (ue) of strain to stabilizer bar force is obtained.
At step 320, the sample is loaded and a test road spectrum is collected.
In some embodiments, the calibrated spring, the shock absorber and the stabilizer bar are loaded according to a design scheme, and four displacement sensors for measuring suspension displacement of the cab are arranged at the same time, wherein the installation positions of the sensors are shown in fig. 8, and the sensors are arranged along the axial direction of the spring suspended in the four cabs. The strain gauge is used when the stabilizer bar is calibrated and is connected with the strain acquisition device. In the step, the displacement of the spring during the static balance of the cab, namely the length variation of the spring relative to the free state, is measured, and then a time domain displacement spectrum of a suspension of the cab and a time domain strain spectrum of the stabilizer bar are acquired when the vehicle runs on a road surface.
At step 330, the road spectrum data is processed.
In some embodiments, the acquired time domain displacement spectrum and time domain strain spectrum are imported into the computing system through the data input module. And in the data processing module, converting the acquired data unit into a unit used by calibration curve data. And (4) performing operations such as deburring, filtering and drift elimination on the time domain strain spectrum to obtain the strain spectrum uE of the stabilizer bar. And differentiating the four processed time domain displacement spectrums to obtain a time domain velocity spectrum Vi with the variable suspension length. And adding the four processed time domain displacement spectrums to the displacement generated by the spring due to the static balance of the cab after installation to obtain a time domain displacement spectrum ui for calculating the spring load spectrum. Fig. 9 is a schematic diagram of a data processing interface according to the present disclosure.
At step 340, a cab fatigue analysis load spectrum is calculated.
In some embodiments, in an automatic calculation module of the calculation system, the stress of the spring is obtained according to a function relationship of mechanical properties of the four springs obtained through test calibration and a time domain displacement spectrum obtained after the test. And obtaining the stress of the damper according to the functional relation of the mechanical properties of the four dampers and the time domain velocity spectrum obtained after the test. And adding the spring force and the damping force at the same position to obtain the suspended load of the cab at the position. And calculating to obtain the interaction force between the stabilizer bar and the cab according to the relation between the strain and the force obtained by calibrating the stabilizer bar and the time-domain strain spectrum, and further obtaining the time-domain load spectrum of the connecting position of the cab and the stabilizer bar connecting arm. Through the steps, the load spectrums of the four suspension positions of the cab and the load spectrums of the left side and the right side of the stabilizer bar can be obtained. As shown in fig. 10, a schematic view of an interface for calculating a load spectrum for each position of the present disclosure.
In step 350, the fatigue damage hot spot area and fatigue life of the cab are calculated.
In some embodiments, fatigue analysis is performed based on the cab fatigue analysis load spectrum to obtain the fatigue damage hot spot region and the fatigue life of the cab. For example, the fatigue analysis load spectrum of the cab obtained by the data output module is used as a boundary condition of the cab fatigue analysis to perform the fatigue analysis, so that the fatigue damage hot spot region and the fatigue life of the cab can be obtained.
In some embodiments, the stress result of the cab under the unit load is calculated by an inertia release method, then the load spectrum is multiplied by the unit force, and the stress results obtained by six loads are superposed. And counting the stress cycle times according to a rain flow counting method, and combining an SN curve of the material to obtain a fatigue damage hotspot and a fatigue life of the cab.
In the above-described embodiment, the displacement of the spring in the cab suspension, the speed of the damper, and the strain of the stabilizer bar when the vehicle is running can be obtained through experiments, and the load spectrum for the fatigue analysis of the full-floating cab with the stabilizer bar can be obtained. Therefore, the fatigue life of the cab can be predicted at the initial stage of the test, and the structure is improved; the simulation boundary condition precision is improved, the times of real vehicle tests and the test cost are reduced, and the scheme is easy for technical popularization.
Fig. 11 is a schematic structural view of some embodiments of cab load extraction devices of the present disclosure. The apparatus includes a sample calibration acquisition unit 1110, a road spectrum data acquisition unit 1120, and a load spectrum analysis unit 1130.
The sample calibration acquiring unit 1110 is configured to acquire the suspension of the cab and the mechanical properties of the stabilizer bar calibration.
In some embodiments, the sample calibration acquiring unit is configured to acquire a first functional relationship of an elastic force and a displacement of the elastic element in the sample for each position of suspension of the cab, a second functional relationship of a damping force and a velocity of the damper, and a third functional relationship of a connecting arm force and a strain of the stabilizer bar.
In some embodiments, when calibrating the spring, the test displacement of the spring is to reach the upper and lower limits of the design value; when the damper is calibrated, the adopted speed is from-400 mm/s to 400 mm/s; when calibrating the stabilizer bar, control stabilizer bar support and ground fixed connection, left stabilizer bar linking arm passes through round pin axle and connecting rod and ground fixed connection, exerts on right stabilizer bar linking arm with stabilizer bar and stabilizer bar linking arm place plane perpendicular load, and the foil gage is pasted in stabilizer bar intermediate position, pastes around the hoop of stabilizer bar. During calibration, the stabilizing rod cannot be plastically deformed by the applied force.
The road spectrum data acquisition unit 1120 is configured to acquire a time-domain displacement spectrum suspending each position and a time-domain strain spectrum of the stabilizer bar.
In some embodiments, the road spectrum data obtaining unit is further configured to derive a time domain velocity spectrum of the suspension corresponding position from the time domain displacement spectrum.
In some embodiments, from the time-domain displacement spectrum, a time-domain velocity spectrum of the corresponding location of the suspension is derived. For example, the time-domain displacement spectrum is differentiated to obtain a time-domain velocity spectrum of the suspended motion.
In some embodiments, the time domain displacement spectrum is the sum of the displacement of the elastic element at cab static equilibrium and the displacement of the elastic element while the vehicle is traveling.
The load spectrum analysis unit 1130 is configured to determine a cab fatigue analysis load spectrum based on the mechanical property, the time domain displacement spectrum and the time domain strain spectrum.
In some embodiments, the cab fatigue analysis load spectrum is determined based on the first functional relationship, the second functional relationship, the third functional relationship, the time domain displacement spectrum, the time domain strain spectrum, and the time domain velocity spectrum.
In some embodiments, the cab fatigue analysis load spectrum includes the load at each position of suspension, and the load at the position where the connecting arm of the stabilizer bar is connected to the cab. Obtaining elastic force at each position based on the first function relation and the time domain displacement spectrum at each position; obtaining a damping force at each position based on the second function relation and the time domain velocity spectrum at each position; and adding the elastic force at each position and the damping force at the corresponding position to obtain the load at each position. And obtaining the interaction force of the connecting position of the connecting arm of the stabilizer bar and the cab based on the third functional relation and the time domain strain spectrum of the stabilizer bar.
For example, the stress of the spring is obtained according to the functional relationship of the mechanical properties of the four springs obtained through test calibration and the time domain displacement spectrum obtained after the test. And obtaining the stress of the damper according to the functional relation of the mechanical properties of the four dampers and the time domain velocity spectrum obtained after the test. And (3) the stress of the spring and the stress of the damper at the same position are used for obtaining the suspended load of the cab at the position. And calculating the interaction force between the stabilizer bar and the cab according to the relationship between the strain and the force obtained by calibrating the stabilizer bar and the time domain strain spectrum, and further obtaining the time domain load spectrum of the connecting position of the cab and the stabilizer bar connecting arm.
In the embodiment, the sample is calibrated, the time domain displacement spectrum and the time domain strain spectrum are collected, the load of the full-floating cab with the stabilizer bar is extracted, and the correlation between the fatigue analysis load of the full-floating cab with the stabilizer bar and a test field can be ensured, so that the accuracy of calculation of the fatigue analysis load spectrum of the full-floating cab with the stabilizer bar is improved, meanwhile, a complex multi-body dynamic model is avoided being established, the load extraction efficiency is improved, and the technical popularization is easy.
In other embodiments of the present disclosure, as shown in fig. 12, the apparatus further includes a fatigue analysis unit 1210 configured to perform fatigue analysis based on the cab fatigue analysis load spectrum, and obtain a fatigue damage hot spot region and a fatigue life of the cab.
In the embodiment, the extracted load spectrum can be directly used for fatigue life analysis, so that the test times and the test cost are reduced.
Fig. 13 is a schematic structural view of further embodiments of the cab load extraction device of the present disclosure. The apparatus 1300 includes a memory 1310 and a processor 1320. Wherein: memory 1310 may be a magnetic disk, flash memory, or any other non-volatile storage medium. The memory is used to store the instructions in the above embodiments. Coupled to memory 1310, processor 1320 may be implemented as one or more integrated circuits, such as a microprocessor or microcontroller. The processor 1320 is configured to execute instructions stored in the memory.
In some embodiments, processor 1320 is coupled to memory 1310 through BUS BUS 1330. The device 1300 may also be connected to an external storage system 1350 via the storage interface 1340 to access external data, and may also be connected to a network or another computer system (not shown) via the network interface 1360. And will not be described in detail herein.
In the embodiment, the data instructions are stored in the memory, and the instructions are processed by the processor, so that the accuracy of calculating the fatigue analysis load spectrum of the full-floating cab can be improved, and the accuracy of fatigue life analysis of the cab can be further improved.
In further embodiments, a computer-readable storage medium has stored thereon computer program instructions which, when executed by a processor, implement the steps of the method in the above-described embodiments. As will be appreciated by one skilled in the art, embodiments of the present disclosure may be provided as a method, apparatus, or computer program product. Accordingly, the present disclosure may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present disclosure may take the form of a computer program product embodied on one or more computer-usable non-transitory storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present disclosure is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the disclosure. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
Thus far, the present disclosure has been described in detail. Some details that are well known in the art have not been described in order to avoid obscuring the concepts of the present disclosure. Those skilled in the art can now fully appreciate how to implement the teachings disclosed herein, in view of the foregoing description.
Although some specific embodiments of the present disclosure have been described in detail by way of example, it should be understood by those skilled in the art that the foregoing examples are for purposes of illustration only and are not intended to limit the scope of the present disclosure. It will be appreciated by those skilled in the art that modifications can be made to the above embodiments without departing from the scope and spirit of the present disclosure. The scope of the present disclosure is defined by the appended claims.
Claims (16)
1. A cab load extraction method, comprising:
obtaining mechanical properties calibrated by a suspension of a cab and a stabilizer bar, wherein the mechanical properties comprise a first function relation between the elastic force and the displacement of an elastic element in a sample piece used at each position of the suspension of the cab, a second function relation between the damping force and the speed of a damper and a third function relation between the force and the strain of a connecting arm of the stabilizer bar;
acquiring a time domain displacement spectrum of each position of the suspension and a time domain strain spectrum of the stabilizer bar; and
determining the cab fatigue analysis load spectrum based on the mechanical property, the time domain displacement spectrum and the time domain strain spectrum.
2. The cab load extraction method of claim 1, further comprising:
obtaining a time domain velocity spectrum of the corresponding position of the suspension according to the time domain displacement spectrum, wherein the determining of the fatigue analysis load spectrum of the cab comprises the following steps:
and determining the fatigue analysis load spectrum of the cab based on the first functional relation, the second functional relation, the third functional relation, the time-domain displacement spectrum, the time-domain strain spectrum and the time-domain speed spectrum.
3. The cab load extraction method according to claim 2, wherein the cab fatigue analysis load spectrum includes a load at each position of the suspension, and a load at a position where a connecting arm of a stabilizer bar is connected to the cab.
4. The cab load extraction method of claim 3, wherein determining the load for each position of the suspension comprises:
obtaining elastic force at each position based on the first function relation and the time domain displacement spectrum at each position;
obtaining a damping force at each position based on the second function relation and the time domain velocity spectrum at each position; and
and adding the elastic force at each position and the damping force at the corresponding position to obtain the load at each position.
5. The cab load extraction method according to claim 3, wherein determining the load at the position where the connecting arm of the stabilizer bar is connected to the cab includes:
and obtaining the interaction force of the connecting arm of the stabilizer bar and the connecting position of the cab based on the third functional relation and the time domain strain spectrum of the stabilizer bar.
6. The cab load extraction method according to claim 1,
and the time domain displacement spectrum is the sum of the displacement of the elastic element when the cab is in static balance and the displacement of the elastic element when the vehicle runs.
7. The cab load extraction method according to any one of claims 1 to 6, further comprising:
and carrying out fatigue analysis based on the fatigue analysis load spectrum of the cab to obtain a fatigue damage hot spot region and a fatigue life of the cab.
8. A cab load extracting device, comprising:
the mechanical properties comprise a first function relation of elastic force and displacement of an elastic element in a sample piece used at each position of the suspension of the cab, a second function relation of damping force and speed of a damper and a third function relation of connecting arm force and strain of a stabilizing rod;
a road spectrum data acquisition unit configured to acquire a time domain displacement spectrum of each position of the suspension and a time domain strain spectrum of the stabilizer bar; and
a load spectrum analysis unit configured to determine the cab fatigue analysis load spectrum based on the mechanical property, the time domain displacement spectrum, and the time domain strain spectrum.
9. The cab load extraction device of claim 8,
the road spectrum data acquisition unit is further configured to obtain a time domain velocity spectrum of the suspension corresponding position according to the time domain displacement spectrum; and
the load spectrum analysis unit is configured to determine the cab fatigue analysis load spectrum based on the first functional relationship, the second functional relationship, the third functional relationship, the time-domain displacement spectrum, the time-domain strain spectrum, and the time-domain velocity spectrum.
10. The cab load extraction device of claim 9, wherein the cab fatigue analysis load spectrum includes a load for each position of the suspension, and a load for a position where a connecting arm of a stabilizer bar is connected to the cab.
11. The cab load extraction device of claim 10,
the load spectrum analysis unit is configured to obtain an elastic force at each position based on the first functional relationship and the time domain displacement spectrum at each position; obtaining a damping force at each position based on the second function relation and the time domain velocity spectrum at each position; and adding the elastic force at each position and the damping force at the corresponding position to obtain the load at each position.
12. The cab load extraction device of claim 10,
the load spectrum analysis unit is configured to obtain an interaction force of a connecting arm of the stabilizer bar and a cab connecting position based on the third functional relationship and a time-domain strain spectrum of the stabilizer bar.
13. The cab load extraction device of claim 8,
and the time domain displacement spectrum is the sum of the displacement of the elastic element when the cab is in static balance and the displacement of the elastic element when the vehicle runs.
14. The cab load extraction device according to any one of claims 8 to 13, further comprising:
and the fatigue analysis unit is configured to perform fatigue analysis based on the cab fatigue analysis load spectrum to obtain a fatigue damage hot spot region and a fatigue life of the cab.
15. A cab load extracting device, comprising:
a memory; and
a processor coupled to the memory, the processor configured to perform the cab load extraction method of any of claims 1-7 based on instructions stored in the memory.
16. A non-transitory computer readable storage medium having stored thereon computer program instructions which, when executed by a processor, implement the cab load extraction method of any of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210526928.8A CN114624037B (en) | 2022-05-16 | 2022-05-16 | Cab load extraction method and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210526928.8A CN114624037B (en) | 2022-05-16 | 2022-05-16 | Cab load extraction method and device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114624037A CN114624037A (en) | 2022-06-14 |
| CN114624037B true CN114624037B (en) | 2022-09-16 |
Family
ID=81906925
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210526928.8A Active CN114624037B (en) | 2022-05-16 | 2022-05-16 | Cab load extraction method and device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114624037B (en) |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007105186A1 (en) * | 2006-03-10 | 2007-09-20 | The Provost, Fellows And Scholars Of The College Of The Holy And Undivided Trinity Of Queen Elizabeth Near Dublin | A system for determining a vehicle load |
| EP2065295A1 (en) * | 2007-11-27 | 2009-06-03 | TNO Bedrijven B.V. | Suspension assembly for suspending a cabin of a truck or the like vehicle |
| CN104268357B (en) * | 2014-10-23 | 2019-02-01 | 山东理工大学 | Coaxial-type driver's cabin stablizes the design method of shank diameter |
| CN106055800A (en) * | 2016-06-03 | 2016-10-26 | 周长城 | Deformation calculation method of internal bias non-coaxial type cab stabilizer bar system |
| CN107543727B (en) * | 2017-08-22 | 2019-05-07 | 吉林大学 | Non-proportional loading degree test method in a kind of normal force control frame of motorcycle room |
| CN107679284A (en) * | 2017-09-08 | 2018-02-09 | 中国第汽车股份有限公司 | The computational methods of coaxial-type driver's cabin stabilizer bar system deformation |
| CN112989489B (en) * | 2021-03-26 | 2022-08-19 | 东风商用车有限公司 | Method for establishing durable load spectrum of commercial vehicle |
-
2022
- 2022-05-16 CN CN202210526928.8A patent/CN114624037B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN114624037A (en) | 2022-06-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110298125B (en) | Fatigue analysis method based on virtual test field technology | |
| EP3500835B1 (en) | Method and system for efficient load identification | |
| CN106897527B (en) | Method and device for analyzing endurance load of vehicle suspension rack | |
| CN105092261A (en) | Road load test method and system | |
| CN104408274A (en) | Structural NVH (Noise Vibration and Harshness) analysis method for vibration interference abnormal noise based on modal frequency response | |
| CN111950170B (en) | Method for obtaining high-precision Macpherson front suspension knuckle rack test load | |
| Helsen et al. | Global static and dynamic car body stiffness based on a single experimental modal analysis test | |
| JP6299805B2 (en) | Apparatus and method for testing rigidity of automobile body | |
| CN103822789B (en) | A kind of core wheel determination of six components of foree method and system | |
| CN113465950A (en) | Vehicle suspension rack | |
| Shinde et al. | Literature review on analysis of various Components of McPherson suspension | |
| CN114624037B (en) | Cab load extraction method and device | |
| CN104156550A (en) | Method for analyzing and calculating damping ratio of vehicle steel plate spring suspension system | |
| CN114065373A (en) | Automobile control arm rack endurance test method, device and equipment | |
| CN104455157A (en) | Obtaining method of car seat suspension hydraulic buffer nonlinear speed characteristic parameter | |
| CN106198059A (en) | McPherson suspension amortisseur side force measurement method and subsidiary frock thereof | |
| CN111090959B (en) | Vehicle load spectrum acquisition method and system | |
| CN113656994B (en) | Suspension force acquisition method and device for automobile suspension system | |
| CN112050982B (en) | Method for testing friction value of automobile chassis suspension assembly and electronic equipment | |
| Sawa et al. | Fatigue life prediction on rough road using full vehicle co-simulation model with suspension control | |
| CN113722814A (en) | Vehicle ride comfort analysis method based on virtual road test | |
| CN113486444A (en) | Service life evaluation method and device of steering gear bracket and storage medium | |
| Londhe et al. | Derivation of Extreme Static Durability Load Cases for FEA Based Vehicle Strength Evaluation | |
| Shankar et al. | Methodology to study the effect of variation of suspension characteristics on body durability | |
| Ziegenmeyer | Estimation of disturbance inputs to a tire coupled quarter-car suspension test rig |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |