关键词: 座椅阻尼可调减振器；复原行程；流固耦合；仿真分析

Abstract: The truck seat damping adjustable shock absorber is a new kind of shock absorber applied to the truck seat suspension and can adjust the damping force manually. In order to shorten the development cycle of this type of shock absorber and reduce the cost input, it is of great significance to study the damping characteristics of the shock absorber. In this paper, SolidWorks software is used to establish the three-dimensional solid model of the shock absorber and the three-dimensional model of the fluid domain under the condition that the damping adjustment hole is fully open. Workbench meshing module is used to mesh the fluid domain model and the equivalent valve plate model, and the fluid-solid coupling contact surface is set up. The transient structure module of Workbench was used to set the solid valve disc, and the boundary conditions of the fluid were set by the ansys fluent module. Through the fluid-structure coupling simulation analysis under the condition that the damping adjustment hole of the shock absorber's recovery stroke is fully open, the stress and deformation of the recovery valve disc at different speed points and the pressure cloud diagram of the flow field are obtained. According to the damping force formula, the damping forces at different velocity points are obtained, and compared with the test results, the correctness of the simulation model is verified.

Key words: seat damping adjustable shock absorber; recovery stroke; fluid-structure coupling; simulation analysis