关键词: 车辆半轴, 任意分布参数, 可靠性优化设计, 可靠性灵敏度设计, 可靠性稳健设计

Abstract:

Techniques from the stochastic perturbation method, the fourth moment technique, the reliability-based design theory and optimization technique, the reliability sensitivity technique and the robust design method were employed to present a practical and effective method for the reliability-based robust design of vehicle semiaxle with arbitrary distribution parameters. The reliability sensitivity which is one of a objective function was added to the reliability-based optimization design model and the reliability-based robust design was described as a multi-objective optimization problem of reliability, minimum of weight and minimum of reliability sensitivity.Under the conditions of given the first four moments of original random,the theoretical formulae of reliability-based robust of vehicle semiaxle with arbitrary distribution parameters were obtained. According to the numerical results, the proposed approach is a practical and effective method.

Key words: vehicle semiaxle, arbitrary distribution parameter, reliability optimization, reliability sensitivity, reliability robust design