Stiffness Assignment Method of Variable Stiffness Virtual Body
A technology of stiffness distribution and variable stiffness, applied in vehicle suspension/shock absorber testing, etc., can solve problems such as large impact load, irrespective of body flexibility, and restricting the simultaneous development of parts and vehicles
Inactive Publication Date: 2016-09-14
UNIV OF SHANGHAI FOR SCI & TECH
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Problems solved by technology
[0002] Most of the existing suspension test benches focus on the internal testing of the suspension system. There is no test device capable of simulating the stiffness of the vehicle body at the installation point of the suspension. This is inconsistent with the real situation in the use of the suspension, resulting in excessive impact load during the test, and the performance of the suspension with good matching indicators on the bench is far from the requirements on the actual vehicle, which limits the performance of parts and vehicles. Simultaneous development
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[0023] The present invention will be further described below in conjunction with the accompanying drawings and specific examples.
[0024] A stiffness distribution method that distributes the stiffness of the whole vehicle body to a part of the body:
[0025] Collect data to determine body torsional stiffness and bias ratio:
[0026] 2. Obtain the line stiffness according to the classic measurement method of torsional stiffness of the car body:
[0027] Based on typical body torsional stiffness tests such as figure 1 As shown, the calculation method for the torsional stiffness of the vehicle body is obtained:
[0028] (1)
[0029] In the formula, W is the torsional stiffness of the vehicle body, F is the force applied by the afterburner device, L1 is the distance at the connection point of the front suspension, is the height difference between the left and right connection points of the front suspension.
[0030] For the deformation of formula (1), rewrite it in the f...
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The invention relates to a method for allocating the stiffness of a virtual vehicle body with variable stiffness. The steps are as follows: 1. Collecting data to determine the torsional stiffness and the bias frequency ratio of the vehicle body; 2. Obtaining the linear stiffness according to the classic measurement method of the torsional stiffness of the vehicle body; 3. Determining the virtual vehicle body Line stiffness: 4. Select the appropriate variable stiffness elastic element. Using this method, the body stiffness of the whole vehicle can be distributed to the quarter body, and the virtual body line stiffness can be obtained. And the rigidity of the virtual body can be changed by choosing the appropriate elastic elements. Provide technical support for the establishment of suspension test bench including simulated body flexibility.
Description
technical field [0001] The invention relates to a stiffness distribution method for distributing the stiffness of a whole vehicle body to a part of the body, in particular to a stiffness distribution method for a quarter body and extending to a half body. Background technique [0002] Most of the existing suspension test benches focus on the internal testing of the suspension system, and there is no test device that can simulate the stiffness of the vehicle body at the suspension installation point. This is inconsistent with the real situation in the use of the suspension, resulting in excessive impact load during the test, and the performance of the suspension with good matching indicators on the bench is far from the requirements on the actual vehicle, which limits the performance of parts and vehicles. Simultaneous development. Rationally, a suspension test rig capable of simulating different body stiffnesses should be established, in an attempt to make the rig test more...
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IPC IPC(8): G01M17/04
Inventor 郑松林高大威冯金芝侯盛昱徐骏刘洋于佳伟方晶邓鑫梁鹏杨涛
Owner UNIV OF SHANGHAI FOR SCI & TECH