Study On Computer Simulation For Four-wheel-drive Vehicle With Liquid Viscous Coupling

As a new technique for improving the performance of vehicle, liquid viscous coupling (LVC) are increasingly applied to Four-wheel-drive vehicles. With the liquid viscous coupling, the automobile not only can improve its traction and adoption, but also have significant effect on handing stability, ride comfort and driving security. Embedded studies are undertaken based on the former researches in this paper.Output torque calculation model of liquid viscous coupling has been created. The distance and the radius of disk plates, the silicone oil viscosity, the shear rate and the rotating speed difference are changed to analyze the torque characteristics. The influences of temperature and shear rate on silicone oil viscosity are researched and the loading and unloading characteristics and hump features have been simulated.Application of Computational Fliud Dynamics analysis software Fluent, liquid viscous coupling's internal flow field has been calculated by numerical method. The simulation results export velocity distribution and density distribution of silicone oil, turbulent viscosity, pressure distribution of internal and external disc and the coupling's temperature distribution. These distribution are used to analyze the internal flow of liquid viscous coupling, providing theory for design and study of liquid viscous coupling.At last, the static strength, stiffness and modal analysis of main parts of liquid viscous coupling are carried on by the finite element analysis soft Hypermesh , And the result which is obtained from the calculation is carried on the analysis, verifies it whether satisfy the request of intensity and toughness.