【摘要】 可靠性分配是可靠性设计的一个重要环节,是一个在达到系统整体安全要求的同时减少花费并提高公共安全的优化过程。面向复杂系统,提出一种基于故障树分析和层次分析的可靠性分配方法,分两步将可靠性目标分配到最小割集后再分配到基本事件,从而实现系统的总体可靠性有效地分配到子系统和零部件上。该方法将专家主观判断与故障树客观计算结果相结合,并提出了新的分配函数,可以根据子系统和零部件的特点有效提高其可靠性,解决了目前方法中所存在的分配效率低、分配结果不合理等问题。最后,利用复杂系统模型的可靠性分配算例检验了该方法的实用性和有效性。更多还原

【Abstract】 Reliability allocation is a significant part of reliability analysis as an optimization process to reduce cost and promote public safety when the reliability goal is achieved.By using Fault Tree Analysis(FTA)and Analytic Hierarchy Process(AHP),this paper proposes a new reliability allocation method including two steps to allocate the whole reliability goal of systems to subsystems and components.Firstly,the method allocates the reliability goal of system to minimal cut-sets,and then allocates the reliability goal of minimal cut-sets to basic events.The method could effectively combines objective computed result from FTA and subjective evaluation from experts.In addition,the paper proposes two new allocation functions which could effectively increase the reliability of subsystems and components based on their properties to improve existing methods,most of which are not reasonable or efficient enough to allocate reliability for complex system.In the end,the paper also examines the feasibility and practicability of the method through reliability allocation of a complex system.更多还原