The reliability-based optimization, the reliability sensitivity technique, and therobust design are employed to present a practical and effective approach of robust reliabilitydesign for mechanical components on the condition of known probabilistic characteristics oforiginal random variables. The theoretical formula of robust reliability design for mechanicalcomponents is obtained. The respective program can be used to obtain the robust reliabilitydesign parameters accurately and quickly. According to the numerical results, the methodproposed is a convenient and practical robust reliability design method.

Techniques from the perturbation method, the reliability-baseddesign theory and optimisation techniques are employed to present apractical and effective method for the reliability-based optimisation ofautomobile components. The theoretical formulae for reliability-basedoptimisation are obtained. The most probable point perturbation method(MPPPM) and reliability-based optimisation theory are employed todevelop the reliability-based optimal design of automobile components.Two examples are used to illustrate the reliability-based optimisationformulation and demonstrate the method. The accuracy of the approachproposed is evaluated by comparing their results to that obtained fromMonte Carlo simulations (MCS)

将可靠性设计理论与灵敏度分析方法相结合，讨论了具有任意分布参数的机械零件的可靠性灵敏度设计问题，提出了可靠性灵敏度设计的计算方法，给出了可靠性灵敏度的变化规律，研究了设计参数的改变对机械零件的可靠性的影响，为机械零件的可靠性设计提供了理论依据。

On the basis of the dynamic equations of the Jeffcott rotor–stator model with imbalance, the reliabilitysensitivity of the rotor–stator systems with rubbing is examined. A statistical fourth moment method is developed to determine the first four moments of system response and state function. The distribution function of the system state function is approximatelydetermined by the standard normal distribution functions using the Edgeworth series technique. The reliabilityand reliabilitysensitivityare obtained and the effect on reliabilityand reliabilitysensitivity of shaft stiffness and damping, stator stiffness and damping, radial clearance and stator radial stiffness is studied. Numerical results are also presented and discussed.

将可靠性优化设计理论、可靠性灵敏度技术与稳健设计方法相结合，讨论了具有非正态分布参数的车辆零件的可靠性稳健设计问题，提出了可靠性稳健设计的计算方法。把可靠性灵敏度溶入可靠性优化设计模型之中，将可靠性稳健设计归结为满足可靠性要求的多目标优化问题。在基本随机参数的前四阶矩已知的情况下，通过计算机程序可以实现具有非正态分布参数的车辆零件的可靠性稳健设计，迅速准确地得到具有非正态分布参数的车辆零件的可靠性稳健设计信息。数值算例表明所提出的方法是一种非常方便和实用的可靠性稳健设计方法。