摘要
悬臂端的静刚度通常对带悬臂的门式起重机轻量化设计起控制作用。这种情形下,使用常规的仅以各结构件截面尺寸为设计变量的优化方法,轻量化的效果通常不理想。以32t-26m带悬臂的L型门式起重机为例,针对悬臂端的静刚度不足问题,在主梁截面尺寸为优化参数的基础上,增加主梁和支腿连接宽度作为优化设计变量,并提出一种非对称的支腿结构形式。分析结果表明:采用改变支腿的连接宽度或支腿形状的方法,门机的质量分别减少10.47%和12.85%,可明显提高轻量化的效果。
In the process of the lightweight design of gantry crane with cantilever,the static stiffness of cantilever usually has control action. For this kind of gantry crane,a conventional method is using the structure section size parameters as the design variables of optimization. However,the effect often is not ideal. Taking a 32t-26m L-shaped gantry crane with cantilever as an example,increasing girder and leg joint width as optimal design variables on the basis of girder cross section size parameters as optimized parameters,also proposed a kind of asymmetric leg structure,in order to solve the problem of lack of static stiffness of cantilever. The results show that the change of the leg shape or girder and leg joint width,the mass of gantry crane reduced by 10.47% and 12.85%,and can improve the effect of lightweight obviously.
出处
《机械设计与制造》
北大核心
2016年第4期17-19,23,共4页
Machinery Design & Manufacture
基金
四川省国际合作研究计划资助(2014HH0022)
