Abstract:

In order to guide the structural design and optimization of frame of a first domestic mining dump truck, the local failure or damage of this component were  concerned,which was due to terrible running road and overweight. Based on SIMP(solid isotropic material with penalization) method and variable density method,topology optimization of frame was studied, where both the stiffness and first-order frequency were regarded as optimization objectives under multiple loading conditions. Compromise programming method was utilized to define multi-objective topology optimization function of multi-stiffness and frequencies. Compared with stiffness and frequency of original frame,it is shown that the performances of optimized structure are definitely improved. Which is extremely helpful to design and optimize frame of mining dump truck so that it is able to work well under terrible situation.

Key words: mining dump truck, variable density, topology optimization, multi-objective, compromise programming

摘要：

为给矿用自卸车车架结构设计和优化提供参考,针对国产首台300t矿用自卸车工作环境极其复杂、行驶路况极为恶劣以及载重量大而导致车架结构容易破坏失效的情况，采用SIMP变密度法对其进行拓扑优化研究，以多工况下的刚度和一阶振动频率为目标，并利用折衷规划法定义的多刚度和高频率的多目标拓扑优化函数进行优化。依据优化结果设计了新的车架，并比较了经验设计下的车架和新车架的刚度和频率。研究结果表明：采用多目标拓扑优化方法指导设计的车架刚度和频率都有显著提高，改善了车架的使用性能，能使车架更好地在恶劣环境中使用。

关键词: 矿用自卸车, 变密度, 拓扑优化, 多目标, 折衷规划法