Fluid-Structure Interaction Simulation Analysis And Experimental Research On Semi-active Hydraulic Engine Mount

With the development of science and technology, people’s demands for the car is not onlylimited the means of transport, but also pay more attention to the car’s ride comfort.Subjected to vibration during driving automobiles there are two, one is generated byvibration of the engine work, the other is the road vibration. So excellent performancesuspension components to improve the car’s ride comfort is very important.According to the chronological development, the mount can be divided into four types.The rubber mount which is widely used in truck has simple structure and low cost, but theisolation is not ideal. Passive hydraulic mount, its performance is superior to rubber mount,but it has a high-frequency dynamic hardening shortcomings. Semi-active mount which isbased on the traditional passive hydraulic mount by changing some of the structuralparameters obtained in different conditions can be adjusted according to the dynamiccharacteristics of a good performance. Active mount which produces the same size andencouragement through the actuator, the force in the opposite direction, thereby attenuatevibration, but the higher cost.Semi-active hydraulic mount performance is affected within the rubber springs andliquid. Nonlinear properties of the rubber material and liquid material increases the difficultyof modeling. With the rapid development of computer, more and more people using the finiteelement method modeling. Using fluid-structure interaction finite element analysis methodto study the semi-active hydraulic mount is introduced in this paper, the following are keyelements:The working principle and structure are analyzed firstly, and then determine thesimulation and test solutions. The3D model is mapped out based on the structuralparameters obtained by mapping.The3D model was imported into the finite element pre-processing software for solid meshing. According to the actual situation, fluid and gas3D model should be made in wherethey are and for meshing. Meshing model is imported into the fluid-structure interactionanalysis software making materials, loads, boundary conditions, constraints and otherconditions, simulation and output simulation results.Pilot programs is developed using the designed fixtures. Semi-active hydraulic mountshould be simulated in static and dynamic properties. The static and dynamic characteristicsof the simulated and experimental results were compared, in order to verify the accuracy ofthe modeling.According to semi-active hydraulic mount structures and works to elect a greater impacton the performance parameters of the mount, The appropriate variation of these parametersto obtain the dynamic characteristics of the mount of the different values of the sameparameters, Research the various parameters for the overall performance of the mount.In this paper, semi-active hydraulic mount was studied in a great detail that providetheoretical support in semi-active hydraulic mount development, improvement andoptimization.