CN110263359B - Hybrid simulation test method and device for suspended tunnel pipeline performance - Google Patents
Hybrid simulation test method and device for suspended tunnel pipeline performance Download PDFInfo
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Abstract
The invention discloses a hybrid simulation test method and device for suspended tunnel pipeline performance. The method is used for analyzing and researching the dynamic characteristics of the suspended tunnel pipe body under the action of vehicle-fluid. The method comprises the following specific steps: dividing the overall structure into a physical substructure and a numerical substructure; establishing a numerical simulation model for the numerical substructure based on a finite element algorithm or related software; prefabricating and mounting the physical substructure according to a full-scale model or a reduced-scale model; the loading control of the physical substructure by the calculation information of the numerical substructure and the model update of the numerical substructure by the measurement information of the physical substructure are completed through a control system, a data interaction system and a data acquisition system; and finally, monitoring and extracting required information through a visual interface. The method solves the problem that the pure numerical algorithm is difficult to simulate the dynamic characteristics of the suspended tunnel under the action of complex load, and also reduces the cost of the test technology and the requirements of field equipment and the like.
Description
Technical Field
The invention relates to the technical field of civil engineering structure simulation and test, in particular to a method and a device for hybrid simulation test of pipeline performance of a suspension tunnel.
Background
As the research focus of traffic engineering in recent years and in the future, with the continuous deepening of research, more and more factors are considered in response analysis of the structure. The tunnel pipe body is used as an important component of a suspension tunnel system, and is not only acted by fluid for a long time in an operation state, but also influenced by vehicle load, and the pipe body vibrates to excite the parameter vibration of the anchor cable. Therefore, it is necessary to consider the performance of the pipe system under the action of the fluid and the vehicle.
Because the pure numerical algorithm is difficult to simulate the problem of a complex suspended tunnel structure, and the traditional test technology is difficult to develop due to factors such as site limitation, high maintenance cost and the like, the provided mixed simulation test technology based on the substructure technology can effectively avoid the problems and capture the dynamic performance of the structure.
Disclosure of Invention
The invention mainly aims to overcome the defects of the prior art, provide the hybrid simulation test method and the hybrid simulation test device for the performance of the suspended tunnel pipeline, solve the problem that the dynamic characteristics of the suspended tunnel under the action of complex load are difficult to simulate by a pure numerical algorithm, and reduce the test cost and the requirements of site equipment and the like.
In order to achieve the purpose, the invention adopts the following technical scheme: a hybrid simulation test method and a hybrid simulation test device for suspended tunnel pipe performance are used for analyzing and researching the dynamic characteristics of a suspended tunnel pipe body under the action of vehicle-fluid. The method is characterized by comprising the following specific steps:
(a) dividing the overall structure into a physical substructure and a numerical substructure;
(b) establishing a numerical simulation model for the numerical substructure based on a finite element algorithm or related software;
(c) prefabricating and mounting the physical substructure;
(d) the loading control of the physical substructure by the calculation information of the numerical substructure and the model update of the numerical substructure by the measurement information of the physical substructure are completed through a control system, a data interaction system and a data acquisition system;
(e) and monitoring and extracting required information through a visual interface.
The hybrid simulation test method and device for the performance of the suspension tunnel pipeline are characterized in that the suspension tunnel pipe body and the anchor cable are used as physical substructures, and the vehicle and the fluid environment are used as numerical substructures to perform simulation.
The hybrid simulation test method and device for the performance of the suspended tunnel pipeline are characterized in that the specific method for establishing the numerical substructure model is as follows:
(i) establishing a numerical substructure model based on various finite element theories or finite element software according to the basic information of the structure;
(ii) and (4) selecting an integral method and integral step length, and solving the motion equation of the structure.
The hybrid simulation test method and device for the performance of the suspended tunnel pipeline are characterized in that the specific method for processing the physical substructure is as follows:
and according to the scale and the complexity of the physical substructure model, performing factory prefabrication processing and installation on the physical substructure by using a full-scale model or a reduced-scale model.
The hybrid simulation test method and device for the performance of the suspended tunnel pipeline are characterized in that the specific method for controlling the loading of the physical substructure comprises the following steps:
(i) displacement prediction, speed prediction, acceleration prediction and internal force solution of the numerical substructure model in each numerical integration step length are completed in the control system, and a control algorithm is adopted for correction;
(ii) and reading the corrected displacement or calculated force value at the joint of the numerical substructure and the physical substructure by a data interaction system and a control system, taking the calculated displacement or calculated force value as a target displacement or target force, and loading the target displacement or target force onto the corresponding degree of freedom of the physical substructure by a loading system and a device.
Further, the specific method for updating the numerical substructure model is as follows:
and measuring the feedback quantity after the actual loading of the physical substructure by the displacement sensor and the force sensor, and transmitting the feedback quantity to the numerical substructure model by the data acquisition system and the data interaction system to be used as a calculation basis for the next integral step length.
The hybrid simulation test method and device for the performance of the suspended tunnel pipeline are characterized in that the specific method for extracting the required information is as follows:
(i) establishing a communication interface with a controller on a main control computer, and regulating and controlling initial parameters on the communication interface;
(ii) the required observation point is input on the main control computer, and the dynamic response of the point is directly read through the memory.
Furthermore, the numerical substructure model is established by adopting a variable memory to store variable parameters under each integral step length, so that information transmission and updating are completed.
Furthermore, the specific method for controlling the loading of the physical substructure is as follows:
(i) if the physical substructure is a full-scale model, a loading system and a device are adopted to directly load the target displacement or the target force on the physical substructure, and the loading device can be divided into an actuator, a vibration table and an actuator-vibration table coupling device according to actual conditions;
(ii) if the physical substructure is a reduced scale model, converting the target displacement or target force into the displacement or force of the physical substructure under the reduced scale model according to similar conditions, and loading the displacement or force onto the physical substructure by a loading system and a device.
Furthermore, the specific method for updating the numerical substructure model is as follows:
(i) if the physical substructure is a full scale model, extracting the displacement or force of the physical substructure model, and directly feeding the displacement or force back to the numerical substructure;
(ii) if the physical substructure is a reduced scale model, extracting the displacement or force of the physical substructure model, converting the displacement or force into the displacement or force of the numerical substructure under the full scale model according to the similar conditions, and feeding the displacement or force back to the numerical substructure.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention adopts a mixed test method based on the substructure technology, effectively avoids the problems of difficult modeling, large calculation pressure and the like of a complex structure by a pure numerical algorithm, and saves the test cost.
2. The numerical simulation part can limit the use of a certain algorithm or software for calculation, and for large-scale structures, the algorithm capable of parallel calculation can be adopted for accelerated calculation, so that the calculation efficiency is effectively improved.
In summary, the present invention provides a powerful means for further studying the structural response of the suspended tunnel tube under the action of multiple loads such as vehicles, fluids, etc.
Drawings
Fig. 1 is a schematic overall flow chart of an embodiment of the present invention.
Fig. 2 is a schematic view of the suspension tunnel tube body of the embodiment of the invention under the action of multiple loads such as vehicles, fluids and the like.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments, but not all embodiments, of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a mixed simulation test method and a device for suspended tunnel pipeline performance, wherein the overall flow schematic diagram is shown in figure 1, and the method mainly comprises the following steps: (a) dividing the overall structure into a physical substructure and a numerical substructure; (b) establishing a numerical simulation model for the numerical substructure based on a finite element algorithm or related software; (c) prefabricating and mounting the physical substructure according to a full-scale model or a reduced-scale model; (d) according to the stress condition, carrying out numerical model solution to obtain the calculation information of boundary points at the connection of the numerical substructure and the physical substructure; (e) through the control system and the data interaction system, after the calculation information of the numerical value substructure is corrected, the loading control of the physical substructure is carried out; (f) feeding back the physical substructure measurement information acquired after loading to a numerical substructure through a data interaction system and a data acquisition system, and completing model updating of the next time step; (g) and monitoring and extracting required information through a visual interface. As shown in fig. 2, the entire flow will be described in detail below.
The method comprises the following steps that firstly, a suspension tunnel pipe body and an anchor cable are used as physical substructures, and vehicles and a fluid environment are used as numerical substructures;
and secondly, connecting the main control computer with the controller to model the numerical substructure. The vehicle is a train model in this embodiment. The train in the tunnel tube is discretized into a series of points, simplifying a set of spring damping elements between the axle and the car body, and the forces of the vehicle acting on the tunnel are transmitted to the car body by the spring damping elements between the axle and the car body. Fluid action was simulated using the Morison equation;
thirdly, completing displacement prediction, speed prediction, acceleration prediction and force solution of the vehicle-fluid model in each numerical integration step length in a control system, and performing displacement correction by adopting a feedforward-feedback comprehensive control algorithm;
fourthly, storing the initial model parameters, the calculated force and the displacement in the control system, and storing the variable parameters under each integral step length by adopting a variable memory to complete information transmission and updating;
fifthly, replacing a group of wheel shafts as actuators, installing the wheel shafts on corresponding positions of the tunnel pipe body, simplifying the action of fluid on the outer wall of the pipe body by the group of actuators, and calculating the corrected displacement xVehicle i +1And xFluid i +1Loading the target displacement to the tunnel pipe body and a driving road surface in the tunnel pipe body respectively;
sixthly, reading the data F of the force sensors arranged on the tunnel pipe body and the driving road surface in the tunnel pipe bodyPipe body i +1，FPavement i +1Feeding back the model to the vehicle model and the fluid model respectively to update the next time step;
seventhly, establishing a communication interface with the controller on the main control computer, and regulating and controlling initial parameters on the communication interface;
and step eight, inputting a point to be checked on the main control computer, and directly reading the dynamic response of the point through a memory.
The drawings in the present specification are schematic views to assist in explaining the concept of the present invention, and schematically show the shapes of respective portions and their mutual relationships. Although the preferred embodiments of the present invention have been described above with reference to the accompanying drawings, the present invention is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and those skilled in the art can make various modifications and variations without departing from the spirit and scope of the invention as claimed in the appended claims.
Claims (9)
1. A hybrid simulation test method for suspended tunnel pipeline performance is used for analyzing and researching the dynamic characteristics of a suspended tunnel pipe body under the action of vehicle-fluid; the method is characterized by comprising the following specific steps:
(a) the overall structure is divided into a physical substructure and a numerical substructure: taking the suspended tunnel pipe body and the anchor cable as physical substructures, and taking the vehicle and the fluid environment as numerical substructures for simulation;
(b) establishing a numerical simulation model for the numerical substructure based on a finite element algorithm;
(c) prefabricating and mounting the physical substructure;
(d) the loading control of the physical substructure by the calculation information of the numerical substructure and the model update of the numerical substructure by the measurement information of the physical substructure are completed through a data interaction system and a data acquisition system;
(e) and monitoring and extracting required information through a visual interface.
2. The hybrid simulation test method for the performance of the suspended tunnel pipeline according to claim 1, wherein the specific method for establishing the numerical substructure model in the step (b) is as follows:
(i) establishing a numerical substructure model based on various finite element theories or finite element software according to the basic information of the structure;
(ii) and (4) selecting an integral method and integral step length, and solving the motion equation of the structure.
3. The hybrid simulation test method for suspended tunnel pipeline performance according to claim 1, wherein the specific method for processing the physical substructure in the step (c) is as follows:
and according to the scale and the complexity of the physical substructure model, performing factory prefabrication processing and installation on the physical substructure by using a full-scale model or a reduced-scale model.
4. The hybrid simulation test method for suspended tunnel pipeline performance according to claim 1, wherein the specific method for controlling the loading of the physical substructure in the step (d) is as follows:
(i) displacement prediction, speed prediction, acceleration prediction and internal force solution of the numerical substructure model in each numerical integration step length are completed in the control system, and a control algorithm is adopted for correction;
(ii) and reading the corrected displacement or calculated force value at the joint of the numerical substructure and the physical substructure by a data interaction system and a control system, taking the calculated displacement or calculated force value as a target displacement or target force, and loading the target displacement or target force onto the corresponding degree of freedom of the physical substructure by a loading system and a device.
5. The hybrid simulation test method for suspension tunnel pipeline performance according to claim 1, wherein the specific method for updating the numerical substructure model in the step (d) is as follows:
and measuring the feedback quantity after the actual loading of the physical substructure by the displacement sensor and the force sensor, and transmitting the feedback quantity to the numerical substructure model by the data acquisition system and the data interaction system to be used as a calculation basis for the next integral step length.
6. The hybrid simulation test method for suspended tunnel pipeline performance according to claim 1, wherein the specific method for extracting the required information in the step (e) is as follows:
(i) establishing a communication interface with the controller on the main control computer, and regulating and controlling each initial parameter on the interface of the main control computer;
(ii) the required observation point is input on the main control computer, and the power response of the point is directly read through the memory.
7. The hybrid simulation test method for suspended tunnel pipeline performance according to claim 2, wherein a variable memory is used for storing variable parameters under each integration step length to complete information transmission and updating.
8. The hybrid simulation test method for the performance of the suspended tunnel pipeline according to claim 4, wherein:
(i) if the physical substructure is a full-scale model, a loading device is adopted to directly load the target displacement or target force on the physical substructure, and the loading device can be divided into an actuator, a vibration table and actuator-vibration table coupling according to actual conditions;
(ii) and if the physical substructure is the reduced scale model, converting the target displacement or the target force into the displacement or the force of the physical substructure under the reduced scale model according to similar conditions, and loading the displacement or the force to the physical substructure by a loading device.
9. The hybrid simulation test method for the performance of the suspended tunnel pipeline according to claim 5, wherein:
(i) if the physical substructure is a full scale model, extracting the displacement or force of the physical substructure model, and directly feeding the displacement or force back to the numerical substructure;
(ii) if the physical substructure is a reduced scale model, extracting the displacement or force of the physical substructure model, converting the displacement or force into the displacement or force of the numerical substructure under the full scale model according to the similar conditions, and feeding the displacement or force back to the numerical substructure.
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| CN104063597A (en) * | 2014-06-19 | 2014-09-24 | 浙江大学 | Integral impact response analyzing method for suspension tunnel |
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| CN104063597A (en) * | 2014-06-19 | 2014-09-24 | 浙江大学 | Integral impact response analyzing method for suspension tunnel |
| CN107463727A (en) * | 2017-06-27 | 2017-12-12 | 浙江大学 | Bulk testing method based on vector mode finite element and FPGA |
| CN107907283A (en) * | 2017-12-02 | 2018-04-13 | 北京工业大学 | A kind of shake table sub-structural test method based on tri-consult volume control AMD |
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