负刚度结构的座椅悬架优化及隔振分析

Optimization and Vibration Isolation Analysis of Vehicle Seat Suspension with Negative Stiffness Structure

为进一步提升车辆座椅悬架的隔振性能,利用连杆弹簧负刚度结构与正刚度弹性元件并联的方式,设计了一种具有准零刚度的座椅悬架系统。基于多目标参数协调优化原理,进行了结构参数优化,获得了使座椅悬架刚度动刚度趋于准零刚度的最佳值。通过对座椅悬架隔振系统的动力学响应分析,以及仿真实验,验证了座椅悬架隔振系统优化的有效性。研究结果表明,采用连杆弹簧负刚度结构的座椅悬架系统能有效提升座椅的隔振效果,并可降低系统本身的固有频率,实现低频和超低频隔振。

In order to further improve the vibration isolation performance of the vehicle seat suspension,a seat suspension system with quasi-zero stiffness is designed by using the negative stiffness structure of the connecting rod spring and the positive stiffness elastic element in parallel.Based on the multi-objective parameter coordination optimization principle,the structural parameters are optimized,and the optimal value for making the seat suspension dynamic stiffness tend to quasi-zero stiffness is obtained.The effectiveness of the seat suspension vibration isolation system is verified by the dynamic response analysis of the seat suspension vibration isolation system and the simulation experiment.The research results show that the seat suspension system with the negative stiffness of the connecting rod spring can effectively improve the vibration isolation effect of the seat,and can reduce the natural frequency of the system itself,and achieve low frequency and ultra low frequency vibration isolation.