| The wheel force test is the basis of research on vehicle dynamics control system and vehicle reliability.The most direct and effective means of current wheel force test is the force measuring wheel sensor(i.e.Force Measuring Wheel).Based on the National Natural Science Foundation of China,the complete finite element model of Force Measuring Wheel is optimized and established in this paper.And the certain strain bridge method is taken as an example to analyze the strain coupling characteristics of the measuring points of Force Measuring Wheel under different working conditions.Research has important theoretical and engineering application value.The main research contents of the paper are as follows:(1)The key modeling technologies as the tire carcass,the contact between the components,the bolt preload and its mesh division of Force Measuring Wheel were studied.The finite element model of the force measurement wheel prototype was established,which provides an effective research method for the whole research of Force Measuring Wheel.(2)The coordinate system transformation,the rotational decoupling principle and the elastic stress deformation characteristics were studied based on the whole of Force Measuring Wheel.At the same time,the typical measuring point piece bridge method was used to determine the position selections of strain measuring point and structural decoupling method,which provides theoretical basis for the test and simulation of Force Measuring Wheel.(3)The bench test of the vertical working condition,lateral working condition,longitudinal working condition and torsional working condition of the force measuring wheel prototype were carried out in combination with the tire stiffness machine.The repeatability analysis were carried out based on the test data,the maximum absolute values of repeatability of the four working conditions were 3.00%,3.00%,3.69%,and 0.50%,respectively.The results show that the bench test system of Force Measuring Wheel has good stability and the test data is reliable and effective.(4)The simulation strain data extraction method based on ABAQUS software was proposed.The simulation for corresponding working condition of the bench test of Force Measuring Wheel were carried out,and the data of the test and simulation were compared and analyzed.The maximum absolute values of relative error of each test point in the four working conditions test and simulation were 4.85%,3.97%,3.41%and 3.10%,respectively.The results show that the simulation strain data extraction method is reasonable and feasible,and the finite element model of Force Measuring Wheel is accurate and reliable.Finally,based on the finite element simulation results of Force Measuring Wheel,the strain decoupling characteristics of measuring points under various working conditions were studied,and the effects of the mechanical properties of the tire rubber and the relative position of the elastomer on the testing accuracy of Force Measuring Wheel were analyzed.In this paper,the complete finite element model of Force Measuring Wheel is established,and the strain coupling characteristics of the typical measuring points are systematically analyzed.The research provides an effective means to further optimize the structure of the elastomer and decoupling analysis. |
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