Abstract: Based on the reliability-based optimization design theory, the reliability sensitivity technique and the robust design method, the reliability-based robust design of vehicle compone- nts with non-normal distribution parameters is extensively disc-ussed and a numerical method for reliability-based robust design is proposed. The reliability sensitivity is added to the reliabil-ity-based optimization design model and the reliability-based robust design is described as a multi-objection optimization. On the condition of known first four moments of basic random variables, the respective program can be used to obtain the reliability-based robust design information of vehicle compon-ents with non-normal distribution parameters accurately and quickly. According to the numerical results, the approach pro-posed is a convenient and practical reliability-based roust des-ign method.

Key words: Non-normal distribution parameters, Reliability optimization, Reliability robust, Reliability sensitivity, Vehicle components