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前言起重臂的设计是汽车起重机设计者所最关心、最重要的部件之一，QY160全地面汽车起重机是目前我国研制的最大的汽车起重机，其臂架系统由伸缩主臂上加装一可变幅的行架副臂组成，总长为叨·sin，对如此庞大的臂架系统进行优化设计就十分必要，设计时应尽量减轻臂架自重。由
Introduction The design of boom is one of the most important and concern parts for truck crane designers. The QY160 all-terrain truck crane is the largest truck crane developed in China. Its boom system is equipped with a telescopic boom It is necessary to optimize the design of such a large boom system. The design should minimize the weight of the boom. by