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本文以普通优化设计为基础，同时考虑设计参数的随机性和模糊性，对汽车起重机起升机构减速器进行了模糊可靠性优化设计，经算例计算表明模糊可靠性优化比普通优化更接近问题实际，设计结果也更经济。
In this paper, based on the general optimization design, taking into account the randomness and fuzziness of the design parameters, the fuzzy reliability optimization design of the hoist gear reducer for truck crane is carried out. The calculation results show that the fuzzy reliability optimization is closer to the problem than the general optimization In fact, the design result is more economical.