Study On Modeling Method And Characteristics Of Hydraulic Mount Optimization

As an important performance of hydraulic mount,dynamic characteristics have always been a research hotspot in this field.Accurate prediction of dynamic characteristic at the beginning of product design is of great significance for reducing development cycle and cost saving.This paper takes the hydraulic mount used in a passenger car as the research object.The dynamic characteristics and the liquid flow in the cavity are simulated and analyzed by the liquid-solid coupling finite element method.By adjusting the design parameters,the influence of parameter changes on characteristics is summarized.On this basis,by adjusting the internal structure size,the characteristics of the hydraulic mount are improved,and the driving experience is improved.The main research contents are as follows:Firstly,according to the working principle and design requirements of the hydraulic mount,the structural model of the hydraulic mount is established by use Catia;by combining with the previous design experience,the material and size of each sub component are set by Hypermesh,and the solid and liquid parts are meshed respectively by local encryption method,which provides the research basis for dynamic characteristics simulation and parametric analysis.Secondly,ADINA-AUI is used set the material properties,node contact and boundary conditions of solid and liquid mesh respectively,The hysteresis loop was obtained through liquid-solid coupling simulation of hydraulic mount with FSI module,and the dynamic characteristic curve was obtained after calculation.According to the simulation results,the influence of preload and amplitude change on the dynamic characteristics and liquid state in the cavity is compared.Then,the dynamic characteristics of the hydraulic mount with different design parameters are simulated,and the simulation results of the pressure and velocity of the liquid in the chamber are combined.The influence of design parameters on dynamic characteristics is summarized.On this basis,the size and structure of the membrane are improved,and the dynamic characteristics of the hydraulic mount are optimized,and verified by simulation.Finally,the hydraulic mount with the new membrane structure is manufactured,and the dynamic characteristics of the single product are tested and the real vehicle evaluation is carried out.The experimental results show that the hydraulic mount simulation model can predict the dynamic characteristics accurately.It can be applied to the initial development of hydraulic mounting products and has certain engineering significance to the prediction of hydraulic mount characteristics.The new decoupling plate structure can improve the dynamic characteristics of hydraulic mounts and provide a new idea for improving the dynamic characteristics of hydraulic mounts in general engineering.