关键词: 广义模糊随机强度, 隶属函数, 模糊安全状态, 模糊可靠性, 模糊数, 动态调控, 灰色关联, 球化孕育, 球墨铸铁, 原铁水

Abstract: Determination of the membership function of fuzzy safety state is the key of fuzzy reliability analysis of structure. The fuzziness and randomness of generalized stress and generalized strength are simultaneously considered, two main characteristic factors that influence the value of fuzzy number are analyzed, the calculation theory of the membership function of fuzzy safety state is developed by using the information obtaining from fuzzy number, and structural fuzzy reliability analysis method based on defining fuzzy safety state by generalized fuzzy random strength is presented. An example is given to illustrate the method.

Key words: Fuzzy number, Fuzzy reliability, Fuzzy safety event, Generalized fuzzy random strength, Membership function, Base iron, Ductile iron, Dynamic adjustment and control, Grey correlation, Nodularization and inoculation