基于有限元法的4.5m熨平板结构优化设计

Structural Optimization of 4.5-meter Screed Based on FEM

为了解决4.5m摊铺机熨平板存在变形量大、刚性差的问题,基于有限元法建立熨平板的简化模型,分析其纵向变形情况;对其左、右两侧板进行了拓扑优化,得到最优拓扑外形;对熨平板主要构成筋板板厚的灵敏度以及板纵向变形情况进行分析。结果表明:熨平板加长段悬臂最外端变形最大,是优化设计中变形控制的关键;熨平板左、右两侧筋板结构设计未按最优传力路径分布材料,影响结构刚性,对此处进行拓扑外形优化;对灵敏度高的筋板进行尺寸参数优化,提高了熨平板结构的刚度。

In order to solve the problems of the 4.5-meter long paver screed that the deformation is big and rigidity is poor, a simplified model was built based on FEM. The analysis of longitudinal deformation was conducted. Optimal topology shape for the left and right boards was obtained by topology optimization. Meanwhile, base on the sensitivity analysis of the main boards of the screed, size optimization was carried out to find the optimal combination of the thickness of the boards, which provides theoretical reference for the improvement and optimization of paver screeds.