Abstract
It brings certain error to reliability design of mechanical components that now most reliability design aiming at establishing pure theoretical mathematical model, without considering arbitrary distribution and variation rules of parameters. In this paper, the variation rules of strength and load effect are studied, the computational method of gradual change reliability is given. By combining the theory of reliability design with the method of sensitivity analysis, the restrictions on random variable distribution types are loosen, the gradual change reliability sensitivity design method with arbitrary distribution parameter is proposed based on the measurement information. Under the circumstance that knowing the first four order moments of basic random parameter, reliability sensitivity design with arbitrary distribution parameter can be brought about by using computer program, which provides the theoretical basis for structural design and life forecast of mechanical components.
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