基于随机振动分析的隔振支架结构优化研究  

Research on Structure Optimization of Support Structure Based on Random Vibration Analysis

作　　者：唐波[1] 

机构地区：[1]重庆工业职业技术学院,重庆401120

出　　处：《重庆交通大学学报（自然科学版）》2014年第5期157-160,共4页Journal of Chongqing Jiaotong University(Natural Science)

摘　　要：隔振支架是复杂随机激励环境下保障关键电子装备正常工作的重要支撑及减振缓冲结构。采用有限单元法、模态和随机振动理论,建立隔振支架结构动力学计算模型,采用Lanczos法对系统模态特性进行了求解。考虑支架结构随机振动激励,基于随机振动响应分析对支架结构进行了结构优化设计,提高了各阶固有频率,使得随机激励下支架结构响应应力、位移值降低且分布更加均匀,有效的避免了应力集中,结构设计更加合理,具有一定的理论及工程应用价值。The support structure which can provide support stiffness and vibration damping is the key component for the normal work of electronic equipment in complex work environment. Based on finite element method, modal analysis and random vibration theory, the systematic dynamic model of the support structure was set up. Using the Lanczos algorithm, the modal characteristics of the system were obtained. The structural optimization design for the support structure was performed considering the actual random vibration incentives. It shows that natural frequencies are increased. Also, the dynamic stress and displacement response of the support structure become more uniform and reasonable. The stress concentration phenomenon is avoided. The method has certain theory and project application value.

关 键 词：机电工程 隔振支架 动态特性 固有频率 随机响应分析 结构优化 

分 类 号：TH113.1[机械工程—机械设计及理论]