| Automotive shock absorber is an important automotive component that determines the comfort of a vehicle.The damping force generated by the shock absorber during the operation has the effect of attenuating the vibration.The study of shock absorber damping characteristics can improve the overall performance of the shock absorber.The flow of fluid inside the shock absorber and the pressure distribution on the fluid-solid coupling surface can be accurately obtained through fluid-solid coupling simulation analysis,which is of great significance to the study of the damping characteristics of the shock absorber.In this paper,a model of double-cylinder automobile shock absorber is used as the research object,and the three-dimensional model of the flow field of recovery valve and compression valve is established by using Solid Works,and the model is symmetrically cut by using Hyper Mesh,and the cut part is meshed and the fluid-solid coupling contact surface is set;the solid-valve flow field of Ansys Workbench-Transient Structural module was used to set up the solid valve piece,and Ansys Workbench-CFX module was used to set up the boundary conditions,inlet and outlet,density,etc.of the fluid part;the flow-solid coupling simulation analysis of the damper was carried out,and the pressure cloud map,velocity vector map and pressure cloud map of the flow-solid coupling surface of the damper were obtained;according to the simulation results combined with the The damping characteristic curve of the damper was calculated based on the simulation results combined with the theoretical equation of fluid-structure coupling.Since the damping value in the obtained damping characteristic curve does not reach the damping value under the normal operation of the damper,the optimized design of the damper throttle plate slot size and the thickness of the throttle plate is carried out,and the optimized finite element model of the damper is analyzed for the fluid-solid coupling. |
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