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| Research on mechanical reliability and optimization design based on fuzzy design criterion |
| CHEN Lian |
| Mechanical Engineering Department, Huaihai Institute of Technology, Lianyungang 222005, China |
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Abstract According to stress-strength distribution interference and fuzzy theory, research on mechanical reliability and optimization design based on fuzzy design criterion is conducted systematically and the concept of surplus reliability is proposed. The mathematic model of such concept is established and design illustrations are provided. The research result indicates that common reliability design, taking required reliability as the unique objective, has no practical meaning because it cannot consider other conditions' constraints on design variables, which leads to the unfeasibility of design result. Reliability and Optimization Design, taking fuzzy reliability as well as all other conditions as design constraints, circumscribes feasible design field in design space and then explores the optimal design scheme in this feasible field with some method according to design objectives, which can guarantee the reliability, feasibility and optimality of design result.
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Published: 28 August 2005
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基于模糊设计准则的机械可靠性优化设计研究
按照应力-强度分布干涉和模糊理论，对机械模糊可靠性优化设计方法进行系统的研究，提出了剩余可靠度的概念，建立了数学模型，给出了设计实例。研究表明：仅仅以实现要求的可靠度为目标的一般模糊可靠性设计由于不能考虑其他条件对设计变量取值的约束作用，往往导致设计结果不具可行性而失去实际意义。可靠性优化设计将模糊可靠性条件与其他所有限制条件一起作为设计约束，在设计空间围成一个可行设计域，然后按照设计目标要求用一定方法寻求可行域内的最优设计点，从而保证了设计结果既具可靠性，又具可行性和最优性。
关键词：
机械,
模糊,
可靠性,
可靠性优化设计
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