力学环境约束下剪切销可靠性分析及优化设计  

Reliability analysis and design optimization of a shear pin constrained by mechanical boundaries

作　　者：王若冰 赵志军[1] 肖和业 陈家文 蒋晓磊 WANG Ruobing;ZHAO Zhijun;XIAO Heye;CHEN Jiawen;JIANG Xiaolei(Xi’an Modern Control Technology Research Institute,Xi’an 710065,Shaanxi,China)

机构地区：[1]西安现代控制技术研究所

出　　处：《爆炸与冲击》2019年第7期126-134,共9页Explosion and Shock Waves

摘　　要：剪切销是火工装置关键部件,其可靠性不仅表现为点火作用下可靠剪断,还表现为受力学环境激励不发生断裂。本文中以多项式混沌展开方法为基础,建立了力学环境约束下的剪切销分析模型,结合序贯优化与可靠性分析方法,提出了剪切销可靠性优化设计的思路。以某型火工作动装置为应用实例,依据实用的力学环境,进行了剪切销可靠性分析及优化设计,揭示了设计参数与力学环境之间的关系,并获得了影响可靠性的关键参数。最后,开展了优化后的火工作动装置实验测试,结果佐证了优化设计的有效性。The shear pin is a key component of an explosive-actuated device.It must be cut by explosive force and guarantee regular work under mechanical environment in reliability analysis.The mechanical model of the shear pin constrained by the mechanical boundary is built based on the polynomial chaos expansion(PCE)method.Then,the sequential optimization and reliability assessment(SORA)method is adopted to promote a reliability-based design optimization(RBDO)for the shear pin.An explosive-actuated device is selected as an application example of reliability analysis and design,which is based on the idea proposed in this paper.Through the parametric sensitivity analysis of the shear pin,the relationship between designing parameters and mechanical environments is revealed and the effective factors on its reliability are obtained.At last,the explosive-actuated device is manufactured with optimal parameters and works normally under mechanical environment.It is proved that the promoted idea is accurate and useful for the reliability design and optimization of the shear pin under mechanical environments.

关 键 词：可靠性分析 可靠性设计优化 多项式混沌展开 序贯优化 剪切销 

分 类 号：O347[理学—固体力学] TJ45[理学—力学]