This paper presents mainly the reliability-based design and reliability-based sensitivity method of mechanical components. Techniques from the probabilistic perturbation method, reliability-based design theory and sensitivity analysis approach are employed to directly make the reliability-based design and reliability-based sensitivity of mechanical components on the condition of known probabilistic characteristics of basic random variables. The reliability-based design and reliability-based sensitivity information of the mechanical components may be accurately and quickly obtained by using the practical computer program. The effects of design parameters on reliability of the mechanical components are studied. The method presented in this paper provided the theoretic basis for the reliability-based design of the mechanical components.
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