| Telescopic hydraulic shock absorber was widely used in modern vehicles, which has a very important influence on the vehicle ride comfort and handing stability.The traditional method of design shock absorber is mainly based on experience and testing amendment.With the development of computer and simulation technology, numerical method to establish and solve the distributed parameter model of shock absorber is becoming a new research trends and design technical. In this paper, the structure and principle of a new type of continuously adjustable shock absorber with solenoid valve is studied by using the professional fluid-structure interaction software ADINA, the mainly study content are as follows:1、The structure and principle of a new type of continuously adjustable shock absorber with solenoid valve is studied.Based on the working process of the shock absorber and the generating mechanism of damping force, the mathematical model of damper is established,and compare with the bench test results, all of which lays the foundation for the subsequent simulation analysis.2. The characteristics of shock absorber under the low speed are analyzed by using the CFD simulation.With the application of CFD numerical methods, a flow model before recovery valve opening under the working condition of shock absorber’s low speed is established and the flow field distribution characteristics of shock absorbers key throttling area is studied. In addition, the influence of damper piston orifice structure parameters to shock absorber low-speed characteristics.is analyzed.3、The analytical formula of large deflection and small deflection theories for annular throttle-slices in shock absorber is compared and analyzed. First the deformation analytical formula of annular throttle-slices in shock absorber based on the two theories is derived;furthermore, the analytical formula of superposition throttle-slices is deduced directly. With the analytical formula and in combination with the numerical simulation results, it was found that the analytical formula of large deflection for annular throttle-slices in shock absorber is more accurate.4 、 Simulation analysis for the fluid-structure interaction of damper’s rehabilitation under the high speed working conditions is carried out. The flow model and structure modelof shock absorber are set up by FEA software ADINA.The solving techniques of the FSI model are also researched. |
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