本文运用离散变量优化设计理论,编制了轮式起重机箱形伸缩式吊臂优化设计程序。本程序使用方便,优化结果不必圆整即为可行设计方案。本文还提出了一种新型的箱形吊臂截面形式,它不仅在工艺上易于实现,而且也改善了腹板的低应力区的应力,并降低了吊臂搭接处的局部应力。 In this paper, discrete variable optimization design theory, the preparation of a wheeled crane box telescopic boom optimization design program. This program is easy to use, optimization results do not have to be rounded design is feasible. A new type of box boom section is also proposed in this paper. It is not only easy to implement in process, but also improves the stress in the low stress area of ​​the web and reduces the local stress on the overlap of the boom.