2500t环轨起重机主臂架的优化设计

Boom optimization design for 2500 t ring-rail cranes

采用分层优化的思想,以总重量为目标函数,以臂架强度、整体刚度、局部刚度和臂端挠度为状态变量,分别用零阶方法和一阶方法对2 500t环轨起重机主臂架进行了优化设计.主臂架重量减轻了18.5%,效果显著.对比分析了两种优化方法的优缺点及适用范围,为大型桁架式臂架优化方法的选择提供了参考.

By treating the total weight as objective function,along with the boom strength,local stiffness and boom end deflection as state variables,the zero-order and first-order methods are respectively used for optimization design on 2 500 t ring-rail crane boom using the conception of hierarchical design.As such,it is found that the boom weight is significantly reduced by 18.5%.In omparison with two optimization design methods regarding advantages,weaknesses and coverage,this approach sets a reference to optimization method selection for large truss booms.K