基于并联机构的车辆座椅参数优化及性能分析  

Parameter optimization and performance analysis of vehicle seat based on parallel mechanism

作　　者：时培成[1] 李云龙 肖平[1] Shi Peicheng;Li Yunlong;Xiao Ping(Automotive New Technology Anhui Engineering and Technology Research Center,Anhui Polytechnic University,241000,Wuhu,China)

机构地区：[1]安徽工程大学汽车新技术安徽省工程技术研究中心,芜湖241000

出　　处：《应用力学学报》2021年第3期1001-1010,共10页Chinese Journal of Applied Mechanics

基　　金：国家自然基金项目(51575001);安徽高校科研平台创新团队建设项目(2016-2018);安徽工程大学中青年拔尖人才资助项目(2016BJRC010)。

摘　　要：为进一步提升车辆座椅悬架的隔振性能,利用连杆弹簧并联机构,设计了一种具有准零刚度的非线性座椅;在对座椅参数进行加速粒子群算法优化后,建立了“人-座椅-车”七自由度集中参数耦合模型,完成了汽车在不同路面激励下的人体动力学响应仿真实验,对比分析了相同激励下线性座椅人体动力学响应。研究结果表明:参数经过加速粒子群优化算法处理的并联机构座椅满足汽车座椅设计国标GB 15083—2006和行标QC/T 740—2005要求;该座椅具有准零刚度特性,在各种路面激励下均能保持较好的隔振效果,在随机路面激励下并联机构非线性座椅悬架系统的人体各部位加速度均方根值下降了86%,位移均方根值下降了38%。In order to further improve the vibration isolation performance of the vehicle seat suspension,a nonlinear seat with quasi-zero stiffness is designed by using link spring parallel mechanism.After optimizing the seat parameters by accelerated particle swarm optimization algorithm,a seven-degree-of-freedom centralized parameter coupling model of“human-seat-car”is established.The simulation experiment of human body dynamics response under different road excitations are completed.The human body dynamic response of linear seat and nonlinear seat under the same excitation is compared.The results show that the parallel mechanism seat with parameters processed by the accelerated particle swarm optimization algorithm can meet the Chinese national standard GB 15083-2006 and the industry standard QC/T 740-2005 requirements,at the same time,the seat has quasi-zero stiffness characteristics,which can maintain better vibration isolation effect than linear seat.For example,under random road excitation,the root mean square value of acceleration of human body of nonlinear seat suspension system of parallel mechanism decreases by 86%,and the root mean square value of displacement decreases by 38%.

关 键 词：并联机构 非线性座椅悬架 加速粒子群算法(APSO) 准零刚度特性 隔振 

分 类 号：TB535[理学—物理] O322[理学—声学]