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运用模糊优化理论，提出了桥式起重机箱型主梁的模糊优化设计方法．按照重量最轻的原则．建立了桥式起重机箱型主梁的模糊优化数学模型，给出了箱型主梁模糊优化的计算实例．
By using the theory of fuzzy optimization, the fuzzy optimization design method of bridge crane girder is proposed. According to the principle of the lightest weight. The fuzzy optimization mathematical model of bridge girder is established, and the calculation example of fuzzy optimization of box girder is given.