基于形质灵敏度的结构可靠性优化及应用研究  

Optimistic Method & Application Study on Structural Reliability Based on Deformation-mass Sensitivity

作　　者：曹航[1] 袁茹[1] 郑钰琪[1] 

机构地区：[1]西北工业大学机电学院,西安710072

出　　处：《机械制造》2012年第11期1-3,共3页Machinery

基　　金：国家自然科学基金资助项目(编号:50875210)

摘　　要：结构可靠性优化设计是重大装备研制中的关键技术之一,对减轻结构质量、提高工作寿命、降低维护成本具有重要意义。采用应力-强度干涉模型建立了装备承力结构件可靠性优化设计的目标函数,基于形质灵敏度形成了结构可靠性优化方法。针对某型起重机吊臂可靠性低的情况,开展了提高其结构可靠性优化设计研究,获得的优化结果使吊臂在不增加质量的前提下可靠度提高到95%,达到了产品设计要求。通过与基于变形灵敏度的常规方法比较,证实该方法更为有效。Optimization design of structural reliability is one of the key technologies in the development of major equipment,and is important in improvement of the operating life and in reduction of the weight and maintenance costs.Stressstrength interference model is adopted to build up the objective function for reliability-optimized design of the equipment loadcarrying structural member.Aiming at the low reliability in a certain type crane boom,an investigation on optimal design to improve the structural reliability was carried out.The optimization results can increase the reliability to 95% without increasing the boom mass that could satisfy the design requirements of the product.Compared with the conventional method based on deformation sensitivity,the method presented in this paper is more effective.

关 键 词：吊臂 形质灵敏度 结构可靠性 可靠性优化 

分 类 号：TH123[机械工程—机械设计及理论] TM344.1[电气工程—电机]