CN114295359B - Method and device for measuring dynamic damping parameters - Google Patents
Method and device for measuring dynamic damping parameters Download PDFInfo
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- CN114295359B CN114295359B CN202210026663.5A CN202210026663A CN114295359B CN 114295359 B CN114295359 B CN 114295359B CN 202210026663 A CN202210026663 A CN 202210026663A CN 114295359 B CN114295359 B CN 114295359B
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Abstract
The invention relates to the technical field of automobile simulation, and discloses a method and a device for measuring dynamic damping parameters, wherein the method for measuring the dynamic damping parameters comprises the following steps: s1, enabling the connecting structure to fall from a first position in a mode that the first connecting piece is connected with the second connecting piece, limiting the first connecting piece at a second position, and enabling the first connecting piece to be located above the second connecting piece so as to enable the first connecting piece to be separated from the second connecting piece at a separation speed V; step S2, obtaining a dynamic separation force F d when the first connecting piece and the second connecting piece are separated; step S3, repeating step S1 and step S2 and obtaining a dynamic separation force F d at a plurality of separation speeds V, and obtaining a dynamic damping parameter c of the connection structure based on the plurality of separation speeds V and the plurality of dynamic separation forces F d. The method for measuring the dynamic damping parameters is simple to operate, low in measuring cost, capable of easily obtaining a larger speed range and capable of meeting the requirement of dynamic simulation.
Description
Technical Field
The invention relates to the technical field of automobile simulation, in particular to a method and a device for measuring dynamic damping parameters.
Background
In the design process of vehicles, finite element simulation is increasingly adopted to simulate the response of the vehicle body under various working conditions so as to achieve the purposes of reducing the research and development cost and shortening the research and development period. Among them, the snap connection is one of the most common connection modes in automobiles, and is generally applied to the connection of structures such as a body panel and a door sheet metal. For the simulation of the whole body, the mesh size of the buckle is limited due to the small geometric size of the buckle, and the whole calculation efficiency is greatly influenced according to actual modeling, so that simplification of the buckle is generally considered.
A common method of simplification of the clasp is to replace the clasp by a connection unit. In the prior art, only the static connection characteristic of the buckle is generally considered, namely, the static rigidity and the failure parameter are defined for the connection unit only, and the dynamic connection characteristic of the buckle is ignored. In order to improve the dynamic simulation accuracy of the buckle, the dynamic connection characteristic of the buckle needs to be introduced into the connection unit. The dynamic connection characteristics can be described by dynamic damping parameters, and in order to obtain the dynamic damping parameters of the buckle, large-scale dynamic mechanical property test equipment is often required to be adopted, the equipment is often high in cost, large in occupied area, complex to operate and limited in experimental speed range, and the dynamic simulation requirement of the buckle is difficult to meet.
Disclosure of Invention
An object of the present invention is to provide a method for measuring dynamic damping parameters, which is simple to operate and low in measurement cost, can easily obtain a larger speed range, and can meet the requirement of dynamic simulation.
For this purpose, the invention adopts the following technical scheme:
the method for measuring the dynamic damping parameters is used for a connecting structure, the connecting structure comprises a first connecting piece and a second connecting piece, and the method for acquiring the dynamic damping parameters comprises the following steps:
s1, enabling the connecting structure to fall from a first position in a mode that the first connecting piece is connected with the second connecting piece, limiting the first connecting piece at a second position, and enabling the first connecting piece to be located above the second connecting piece so as to enable the first connecting piece to be separated from the second connecting piece at a separation speed V;
Step S2, obtaining a dynamic separation force F d when the first connecting piece and the second connecting piece are separated;
Step S3, repeating step S1 and step S2 and obtaining a dynamic separation force F d at a plurality of separation speeds V, and obtaining a dynamic damping parameter c of the connection structure based on the plurality of separation speeds V and the plurality of dynamic separation forces F d.
As a preferred embodiment of the method for measuring a dynamic damping parameter, the step of obtaining the dynamic damping parameter c of the connection structure based on the plurality of separation speeds V and the plurality of dynamic separation forces F d in step S3 specifically includes:
Step S31, obtaining a static separation force F s of the connecting structure;
step S32, respectively obtaining a difference value delta F between each dynamic separation force F d and the static separation force F s, and obtaining a dynamic damping parameter measurement value c i according to the ratio of the difference value delta F to the corresponding separation speed V;
step S33, averages a plurality of dynamic damping parameter measurement values c i to obtain the dynamic damping parameter c.
As a preferred embodiment of the method for measuring a dynamic damping parameter, in step S31, the static separation force F s is equal to the product of the connection stiffness K and the failure displacement U, where the failure displacement U is the relative displacement between the first connection member and the second connection member during the separation process from when the first connection member is just limited to when the first connection member is completely separated from the second connection member.
As a preferred embodiment of the method for measuring the dynamic damping parameter, the separation speed V is equal to the ratio of the failure displacement U to the separation time t, which is the duration of the separation process.
As a preferred embodiment of the method for measuring a dynamic damping parameter, the step of obtaining the dynamic damping parameter c of the connection structure based on the plurality of separation speeds V and the plurality of dynamic separation forces F d in step S3 specifically includes:
the dynamic separation force F d and the separation speed V are fitted and the dynamic damping parameter c is equal to the slope of the fitted curve of the dynamic separation force F d and the separation speed V.
As a preferable embodiment of the method for measuring a dynamic damping parameter, before the connecting structure is dropped in step S1, the method further includes:
The mass is connected to a second connector.
As a preferable scheme of the method for measuring a dynamic damping parameter, the step S3 of obtaining the dynamic separation force F d at a plurality of separation speeds V specifically includes:
The relative distance between the first and second positions and/or the mass of the weight is adjusted such that the first and second connection members are separated at different separation speeds V and a dynamic separation force F d at each separation speed V is obtained, respectively.
As a preferable embodiment of the method for measuring a dynamic damping parameter, in step S1, before the connecting structure is dropped, the method further includes:
the input end of the detection component is connected with the first connecting piece and/or the second connecting piece.
The invention has the beneficial effects that:
The invention provides a method for measuring dynamic damping parameters, which comprises the following steps: s1, enabling the connecting structure to fall from a first position in a mode that the first connecting piece is connected with the second connecting piece, limiting the first connecting piece at a second position, and enabling the first connecting piece to be located above the second connecting piece so as to enable the first connecting piece to be separated from the second connecting piece at a separation speed V; step S2, obtaining a dynamic separation force F d when the first connecting piece and the second connecting piece are separated; step S3, repeating step S1 and step S2 and obtaining a dynamic separation force F d at a plurality of separation speeds V, and obtaining a dynamic damping parameter c of the connection structure based on the plurality of separation speeds V and the plurality of dynamic separation forces F d. The method for measuring the dynamic damping parameters is simple to operate, does not need to adopt large dynamic mechanical property test equipment, has low measurement cost, can easily obtain a larger speed range, and can meet the requirement of dynamic simulation.
The invention also aims to provide a measuring device for dynamic damping parameters, which has the advantages of simple structure, convenient operation and low measuring cost, can easily obtain a larger speed range, and can meet the requirement of dynamic simulation.
For this purpose, the invention adopts the following technical scheme:
a measuring device for dynamic damping parameters for measuring dynamic damping parameters of a connection structure, the connection structure comprising a first connection and a second connection, the measuring device for dynamic damping parameters comprising:
the frame is provided with a limiting structure, and the limiting structure is configured to limit the first connecting piece when the connecting structure falls from the upper side of the limiting structure so as to separate the first connecting piece from the second connecting piece;
and the input end of the detection component is connected with the first connecting piece and/or the second connecting piece so as to measure the dynamic separation force F d when the first connecting piece and the second connecting piece are separated.
As an optimal scheme of the measuring device for the dynamic damping parameters, the rack is provided with a sliding rail, the measuring device for the dynamic damping parameters further comprises a sliding block which is in sliding fit with the sliding rail, and the sliding block is fixedly connected with the first connecting piece and can be abutted to the limiting structure.
As a preferred embodiment of the device for measuring dynamic damping parameters, the device for measuring dynamic damping parameters further comprises a mass, which mass is connected to the second connection element.
As a preferable mode of the measuring device for dynamic damping parameters, the measuring device for dynamic damping parameters further comprises a buffer member located below the limit structure to buffer the second connecting member.
The invention has the beneficial effects that:
The invention provides a measuring device for dynamic damping parameters, which is characterized in that when the dynamic damping parameters c of a connecting structure are measured, the connecting structure falls from the upper part of a limiting structure in a mode that a first connecting piece and a second connecting piece are connected, the limiting structure can limit the first connecting piece and enable the second connecting piece to continuously fall, so that the first connecting piece and the second connecting piece are separated at a separation speed V, a dynamic separation force F d when the first connecting piece and the second connecting piece are separated is obtained through a detection component, and the dynamic damping parameters c of the connecting structure are obtained based on a plurality of separation speeds V and a plurality of dynamic separation forces F d. The measuring device for the dynamic damping parameters is simple in structure, convenient to operate and low in measuring cost, can easily obtain a larger speed range, and can meet the requirement of dynamic simulation.
Drawings
Fig. 1 is a flowchart of a method for measuring a dynamic damping parameter according to an embodiment of the present invention.
Detailed Description
In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved more clear, the technical solutions of the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to fall within the scope of the invention.
The technical scheme of the invention is further described below by the specific embodiments with reference to the accompanying drawings.
As shown in fig. 1, the present embodiment provides a method for measuring a dynamic damping parameter, which is used for a connection structure, the connection structure includes a first connection member and a second connection member, and the method for measuring the dynamic damping parameter includes:
s1, enabling the connecting structure to fall from a first position in a mode that the first connecting piece is connected with the second connecting piece, limiting the first connecting piece at a second position, and enabling the first connecting piece to be located above the second connecting piece so as to enable the first connecting piece to be separated from the second connecting piece at a separation speed V;
Step S2, obtaining a dynamic separation force F d when the first connecting piece and the second connecting piece are separated;
Step S3, repeating the step and the step S2, obtaining a dynamic separation force F d at a plurality of separation speeds V, and obtaining a dynamic damping parameter c of the connection structure based on the plurality of separation speeds V and the plurality of dynamic separation forces F d.
The method for measuring the dynamic damping parameters is simple to operate, high in measuring efficiency and low in measuring cost for the dynamic damping parameters c, the dynamic damping parameters c can be obtained without large dynamic performance test equipment, and in addition, a large speed range can be obtained easily, so that the requirement of simulation modeling is met.
It can be understood that the connection structure can freely fall from the first position, and the ejection mechanism can also be arranged at the first position, so that the connection structure falls from the first position at a certain initial speed under the action of the ejection mechanism, the distance between the first position and the second position can be shortened, and a larger experimental speed range can be obtained. The ejection mechanism is in the prior art, and this embodiment will not be described in detail.
In this embodiment, connection structure specifically refers to the buckle of automobile body, and first connecting piece and second connecting piece refer to sheet metal component and buckle body respectively, have seted up the joint hole on the sheet metal component, and the buckle body can the joint in the joint hole. Of course, the kind of the connection structure is not limited to this, and the method for measuring the dynamic damping parameter can also be used for measuring the dynamic damping parameter of other kinds of connection structures.
It can be understood that when falling, the sheet metal part is located above the buckle body, the sheet metal part can be conveniently limited, and meanwhile, the condition of buckle failure of the vehicle body under the actual working condition can be more truly simulated, so that the measurement accuracy of the measurement method of the dynamic damping parameters is improved. Of course, in other embodiments, the buckle body may be located above the sheet metal part, and the buckle body is limited in the falling process at this time, so that the sheet metal part is separated from the buckle body, and the buckle body may be set according to actual detection requirements, which is not limited in this embodiment.
Specifically, the step of obtaining the dynamic damping parameter c of the connection structure based on the plurality of separation speeds V and the plurality of dynamic separation forces F d in step S3 includes:
Step S31, obtaining a static separation force F s of the connecting structure;
step S32, respectively obtaining a difference value delta F between each dynamic separation force F d and the static separation force F s, and obtaining a dynamic damping parameter measurement value c i according to the ratio of the difference value delta F to the corresponding separation speed V;
Step S33, average the measured value c i of each dynamic damping parameter to obtain the dynamic damping parameter c.
It will be appreciated that the dynamic separation force F d of the connection may be described by the sum of the static separation force F s and a damping term representing the velocity effect, wherein the damping term is typically described using a linear viscous damping model, i.e. the damping term may be expressed as the product of the dynamic damping parameter c and the separation velocity V, whereby the dynamic separation force F d may be expressed as:
Fd＝Fs+cV
Thus, from the current separation speed V, the corresponding dynamic separation force F d and the static separation force F s, a dynamic damping parameter measurement c i at the current separation speed V can be obtained, from which the dynamic damping parameter c can be determined from an average of a plurality of dynamic damping parameter measurements c i. Because the measurement technology of the static separation force F s is mature, the measurement accuracy of the static separation force F s is high, and the measurement accuracy of the dynamic damping parameters can be improved by introducing the static separation force F s to measure the dynamic damping parameters.
It should be noted that, for a plurality of separation speeds V and corresponding dynamic separation forces F d, the corresponding dynamic damping parameter value c i may be directly calculated, and then the dynamic damping parameter c is obtained by using the average value of each dynamic damping parameter measurement value c i, or the dynamic damping parameter average value c 'corresponding to the current separation speed V may be obtained by averaging the dynamic damping parameter measurement values c i corresponding to the same separation speed V, and then the dynamic damping parameter average value c' corresponding to different separation speeds V may be averaged to obtain the dynamic damping parameter c.
In this embodiment, the dynamic separation force F d refers to the maximum value of the separation force during the separation of the first and second connectors. Furthermore, the static separation force F s is the maximum value of the forces during separation of the first and second connectors measured under static or quasi-static conditions.
Of course, the manner of obtaining the dynamic damping parameter c of the connection structure based on the plurality of separation speeds V and the plurality of dynamic separation forces F d in step S3 is not limited thereto, and in other embodiments, the static separation force F s of the connection structure may not be obtained, but the dynamic separation force F d and the separation speed V may be directly fitted, and the dynamic damping parameter c is equal to the slope of the fitted curve of the dynamic separation force F d and the separation speed V, which may be selected according to the actual measurement and simulation requirements, which is not limited in this embodiment.
Optionally, in step S1, before the connecting structure is dropped, the method further includes:
the input end of the detection assembly is connected with the first connecting piece and/or the second connecting piece so as to detect acting force between the first connecting piece and the second connecting piece, and therefore dynamic separation force F d is obtained.
In some cases, the connection stiffness K is a known connection property, in which case the measurement can be further simplified. Specifically, in step S31, the static separation force F s is equal to the product of the connection stiffness K and the failure displacement U, which is the relative displacement between the first connection member and the second connection member during the separation process from the time when the first connection member is just limited to the time when the first connection member is completely separated from the second connection member. The product of the connection rigidity K and the failure displacement U is used for representing the static separation force F s, the static separation force F s is not required to be measured, the measurement efficiency of the dynamic damping parameter c can be improved, and the measurement step of the dynamic damping parameter c is further simplified.
Further, since the separation speed of the first connector and the second connector during the separation process is not kept constant, in this embodiment, the average speed of the first connector and the second connector during the separation process is used as the separation speed V, that is, the separation speed V is equal to the ratio of the failure displacement U to the separation time t, where the separation time t is the duration of the separation process, and the dynamic separation force F d can be expressed as:
Fd＝KU+cU/t
Therefore, the physical quantity required to be obtained in the measuring process of the dynamic damping parameter c can be reduced, the measurement of the dynamic damping parameter c is further facilitated, an experimental device can be simplified, and accordingly the measuring cost is further reduced.
It will be appreciated that the separation time t may be obtained from a plot of separation force versus time measured by the detection assembly during separation. Specifically, the separation time t corresponds to a time period during which the separation force starts to rise from 0N to return to 0N for the first time.
Of course, the calculation method of the separation speed V is not limited to this, in other embodiments, the separation speed V in the separation process may be measured by using a speed sensor, and the average value may be taken as the separation speed V to calculate and obtain the dynamic damping parameter measurement value c i, which may be set according to the actual measurement requirement, and this embodiment is not limited to this.
Preferably, before the connecting structure is dropped in step S1, the method further includes:
The mass is connected to a second connector.
Through link to each other the quality piece with the second connecting piece, when connection structure whereabouts's in-process carries out spacingly to first connecting piece, the quality piece can provide vertical decurrent effort to the second connecting piece, makes the second connecting piece can separate with first connecting piece more easily.
Further, the step S3 of obtaining the dynamic separation force F d at the plurality of separation speeds V specifically includes:
The relative distance between the first and second positions and/or the mass of the weight is adjusted such that the first and second connection members are separated at different separation speeds V and a dynamic separation force F d at each separation speed V is obtained, respectively.
The separation speed V can be adjusted by adjusting the relative distance between the first position and the second position and/or the weight of the weight block, the adjustment is convenient, and a larger speed adjustment range can be obtained.
Illustratively, the mass is a weight, the weight can be conveniently adjusted to achieve the desired separation speed V.
The embodiment also provides a measuring device for dynamic damping parameters, which comprises a frame and a detection assembly, wherein a limiting structure is arranged on the frame and is configured to limit the first connecting piece when the connecting structure falls down from the upper part of the limiting structure, so that the first connecting piece and the second connecting piece are separated, and the input end of the detection assembly is connected with the first connecting piece and/or the second connecting piece to measure dynamic separation force F d when the first connecting piece and the second connecting piece are separated.
When the dynamic damping parameter c of the connecting structure is measured, the connecting structure falls down from the upper part of the limiting structure in a mode that the first connecting piece and the second connecting piece are connected, the limiting structure can limit the first connecting piece and enable the second connecting piece to continuously fall down, so that the first connecting piece and the second connecting piece are separated at a separation speed V, a dynamic separation force F d when the first connecting piece and the second connecting piece are separated is obtained through the detection component, and the dynamic damping parameter c of the connecting structure is obtained based on a plurality of separation speeds V and a plurality of dynamic separation forces F d. The measuring device for the dynamic damping parameters is simple in structure, convenient to operate and low in measuring cost, can easily obtain a larger speed range, and can meet the requirement of dynamic simulation.
Specifically, the detection assembly comprises a force sensor and a data collector which are electrically connected with each other, and the force sensor is connected with the first connecting piece and/or the second connecting piece. The force sensor can be connected with the first connecting piece or the second connecting piece, or two force sensors can be adopted, the two force sensors are respectively connected with the first connecting piece and the second connecting piece, the dynamic separation force F d when the first connecting piece and the second connecting piece are separated is detected by adopting the two force sensors, the detection precision of the dynamic separation force F d can be improved, and meanwhile, the detection abnormality of the force sensors can be timely found through the comparative analysis of the data obtained by the two force sensors.
In this embodiment, the dynamic separation force F d of the connection structure is in the range of about 100N-350N, the separation speed V is about Wei 0m/s-5m/s, and the frequency of the data collector is about 1000Hz or more.
Optionally, be provided with the slide rail in the frame, this dynamic damping parameter's measuring device still includes with slide rail sliding fit's slider, slider and first connecting piece fixed connection and can with limit structure looks butt to provide guiding effect to connection structure's whereabouts, guarantee that first connecting piece and second connecting piece can be separated in limit structure department, thereby improve dynamic damping parameter c's detection efficiency.
The rack comprises two opposite supporting pieces, wherein the number of the sliding rails is two, and the two sliding rails are respectively arranged on the two supporting pieces; the limit structure comprises two limit parts, the two limit parts are respectively arranged below the two slide rails, the slide blocks are arranged in one-to-one correspondence with the slide rails, each slide block is fixedly connected with the first connecting part, each slide block is in sliding fit with the corresponding slide rail, when the slide blocks slide to the limit structure, the lower parts of each slide block can be abutted against the upper parts of the corresponding limit parts, so that the first connecting part is limited, and meanwhile, the second connecting part can continuously fall down between the two limit parts, so that the second connecting part is separated from the first connecting part.
Preferably, the measuring device for dynamic damping parameters further comprises a mass block, wherein the mass block is connected with the second connecting piece, so that when the connecting structure reaches the limiting structure, the second connecting piece can be separated from the first connecting piece under the action of the mass block, and meanwhile, the separation speed V between the first connecting piece and the second connecting piece can be adjusted by adjusting the weight of the mass block.
The mass is illustratively a weight that is connected to the second connector by a wire rope.
Optionally, the measuring device of dynamic damping parameters further includes a buffer member located below the limiting structure to buffer and protect the second connecting member and other structures.
Illustratively, the cushioning member is a foam cushion.
In the description of the present specification, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present embodiment and simplifying the description, and do not indicate or imply that the apparatus or structure to be referred to must have a specific direction, be configured and operated in the specific direction, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Wherein the terms "first position" and "second position" are two different positions.
In the description herein, reference to the term "one embodiment," "an example," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples.
Unless specifically stated or limited otherwise, the terms "mounted," "connected," and "fixed" are to be construed broadly, and may be, for example, either fixed or removable; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
Unless expressly stated or limited otherwise, a first feature being "above" or "below" a second feature may include the first feature and the second feature being in direct contact, or may include the first feature and the second feature not being in direct contact but being in contact with each other by way of additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.
Furthermore, the foregoing description of the preferred embodiments and the principles of the invention is provided herein. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, while the invention has been described in connection with the above embodiments, the invention is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the invention, which is set forth in the following claims.
Claims (7)
1. The method for measuring the dynamic damping parameters is used for a connecting structure, and the connecting structure comprises a first connecting piece and a second connecting piece, and is characterized in that the method for acquiring the dynamic damping parameters comprises the following steps:
s1, enabling the connecting structure to fall from a first position in a mode that the first connecting piece is connected with the second connecting piece, limiting the first connecting piece at a second position, and enabling the first connecting piece to be located above the second connecting piece so as to enable the first connecting piece to be separated from the second connecting piece at a separation speed V;
Step S2, obtaining a dynamic separation force F d when the first connecting piece and the second connecting piece are separated;
Step S3, repeating the step S1 and the step S2, and obtaining dynamic separation force F d at a plurality of separation speeds V, and obtaining a dynamic damping parameter c of the connecting structure based on the plurality of separation speeds V and the plurality of dynamic separation forces F d;
the step of obtaining the dynamic damping parameter c of the connection structure based on the plurality of separation speeds V and the plurality of dynamic separation forces F d in step S3 specifically includes:
Fitting the dynamic separation force F d and the separation speed V, wherein the dynamic damping parameter c is equal to the slope of a fitted curve of the dynamic separation force F d and the separation speed V;
before the connection structure is dropped in step S1, the method further includes: connecting the mass block with a second connecting piece;
The step S3 of obtaining the dynamic separation force F d at the plurality of separation speeds V specifically includes: adjusting the relative distance between the first and second positions and/or the mass of the weight block so that the first and second connection members are separated at different separation speeds V and a dynamic separation force F at each separation speed V is obtained respectively d;
In step S1, before the connection structure is dropped, the method further includes: the input end of the detection component is connected with the first connecting piece and/or the second connecting piece.
2. The method according to claim 1, wherein the step of obtaining the dynamic damping parameter c of the connection structure based on the plurality of separation speeds V and the plurality of dynamic separation forces F d in step S3 specifically comprises:
Step S31, obtaining a static separation force F s of the connecting structure;
step S32, respectively obtaining a difference value delta F between each dynamic separation force F d and the static separation force F s, and obtaining a dynamic damping parameter measurement value c i according to the ratio of the difference value delta F to the corresponding separation speed V;
Step S33, average the measured value c i of each dynamic damping parameter to obtain the dynamic damping parameter c.
3. The method according to claim 2, wherein in step S31, the static separation force F s is equal to the product of the connection stiffness K and the failure displacement U, the failure displacement U being the relative displacement of the first connection member and the second connection member during the separation from the moment the first connection member is just limited to the moment the first connection member and the second connection member are completely separated.
4. A method of measuring a dynamic damping parameter according to claim 3, characterized in that the separation speed V is equal to the ratio of the failure displacement U to the separation time t, which is the duration of the separation process.
5. A measuring device for measuring a dynamic damping parameter using the measuring method of a dynamic damping parameter according to any one of claims 1-4 for measuring a dynamic damping parameter of a connection structure, the connection structure comprising a first connection and a second connection, characterized in that the measuring device of a dynamic damping parameter comprises:
the frame is provided with a limiting structure, and the limiting structure is configured to limit the first connecting piece when the connecting structure falls from the upper side of the limiting structure so as to separate the first connecting piece from the second connecting piece;
the input end of the detection component is connected with the first connecting piece and/or the second connecting piece so as to measure dynamic separation force F d when the first connecting piece and the second connecting piece are separated;
the measuring device of the dynamic damping parameter further comprises a mass block, and the mass block is connected with the second connecting piece.
6. The device for measuring dynamic damping parameters according to claim 5, wherein a sliding rail is arranged on the frame, and the device for measuring dynamic damping parameters further comprises a sliding block in sliding fit with the sliding rail, wherein the sliding block is fixedly connected with the first connecting piece and can be abutted against the limiting structure.
7. The device for measuring dynamic damping parameters according to claim 5, further comprising a buffer member positioned below the limit structure to buffer the second connection member.
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| CN202210026663.5A CN114295359B (en) | 2022-01-11 | 2022-01-11 | Method and device for measuring dynamic damping parameters |
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| CN202210026663.5A CN114295359B (en) | 2022-01-11 | 2022-01-11 | Method and device for measuring dynamic damping parameters |
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