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

摘要： 货车座椅阻尼可调减振器是一种应用于货车座椅悬架上的并可以手动调节阻尼力的新 型减振器。为了缩短此类型减振器的研发周期，减少成本投入，因此，减振器阻尼特性的研 究具有重大意义。文章使用 SolidWorks 软件建立减振器的三维实体模型和阻尼调节孔全开工 况下的流体域三维模型，使用 Workbench Meshing 模块对流体域模型与等效阀片模型进行网 格划分，并设置了流固耦合接触面等，使用 Workbench 瞬态结构模块进行了固体阀片的设置， 使用 ANSYS Fluent 模块设置了流体的边界条件等，通过对减振器复原行程阻尼调节孔全开工 况下的流固耦合仿真分析，得到不同速度点的复原阀片受力与变形量情况和流场区域压强云 图，根据阻尼力计算公式得到不同速度点的阻尼力大小，并与试验结果进行对比，验证了仿 真模型的正确性。

关键词: 座椅阻尼可调减振器；复原行程；流固耦合；仿真分析