某轻卡座椅模态分析与结构优化
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摘要
针对某款轻卡驾驶员座椅抖动问题,利用CATIA软件和Hyperworks软件分别建立了座椅的3D模型和有限元模型,对座椅进行模态分析并提出增加坐垫骨架厚度以及在座椅安装点处增加支架的优化设计方案。通过有限元分析方法得出座椅优化前后的模态频率由15.00 Hz提高到了18.06 Hz,避免了座椅与车身系统发生共振。研究结果表明,通过动力学方法可以解决轻卡座椅抖动问题,为提高轻卡座椅舒适性及优化设计提供借鉴方案。
To reduce or eliminate the jittering of the driver seat in a certain light truck,a 3D model and a finite element model of the seat were established using CATIA and Hyperworks, and a modal analysis of the seat carried out and an optimization scheme of it put forward increasing cushion frame thickness and adding bracket at seat mounting point.Through the finite element analysis, the modal frequency was increased from 15.0 Hz to 18.06 Hz after seat optimization, thus avoiding the resonance between the seat and the body system.The results show that the dynamic method can solve the problem of light truck seat jitter, which provides a useful sample scheme for improved comfort and optimizedl design of the light truck seat.
To reduce or eliminate the jittering of the driver seat in a certain light truck,a 3D model and a finite element model of the seat were established using CATIA and Hyperworks, and a modal analysis of the seat carried out and an optimization scheme of it put forward increasing cushion frame thickness and adding bracket at seat mounting point.Through the finite element analysis, the modal frequency was increased from 15.0 Hz to 18.06 Hz after seat optimization, thus avoiding the resonance between the seat and the body system.The results show that the dynamic method can solve the problem of light truck seat jitter, which provides a useful sample scheme for improved comfort and optimizedl design of the light truck seat.
引文
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[11]高继东,李洪亮,王海洋.轮毂处边界约束对扭力梁悬架系统低阶模态的影响分析[J].汽车技术,2016(8):27-30.
[2]杨文彪,马迅,张继伟.汽车座椅骨架的数值模态分析与验证[J].湖北汽车工业学院学报,2016,30(4):5-8,23.
[3]叶佳桐,谭研,车欣禹.汽车驾驶员座椅舒适性仿真方法[J].汽车工程师,2016(2):35-37.
[4]刘明彬.客车座椅静强度有限元仿真分析与结构优化[J].宿州学院学报,2015,30(2):96-99.
[5]张道林,杨维平.基于人机工程学的轻卡驾驶室座椅设计方法[J].重庆工学院学报(自然科学版),2008(9):20-24.
[6]符大兴.对汽车座椅设计的探讨[J].企业科技与发展,2011(12):31-33.
[7]张向东,高捷,闫维明.环境振动对人体健康的影响[J].环境与健康杂志,2008(1):74-76.
[8]李雪城,谭继锦,孙剑.基于模态匹配的汽车座椅骨架模态分析与优化[J].车辆与动力技术,2018(2):47-50,55.
[9]何朝聪,刘培培,严春飞.基于ANSYS的磨床主轴模态分析[J].上海师范大学学报(自然科学版),2015,44(5):461-465.
[10]林祖胜,兰靛靛,邓兵.商用车司机座椅骨架有限元建模与优化[J].厦门理工学院学报,2014,22(5):21-24.
[11]高继东,李洪亮,王海洋.轮毂处边界约束对扭力梁悬架系统低阶模态的影响分析[J].汽车技术,2016(8):27-30.