干片式制动器支撑结构的拓扑优化方法

A Topology Optimization Method for Support Structure of Dry Disc Brake

提出了一种干片式制动器支撑结构的拓扑优化设计建模方法.基于变密度法,以支撑结构关键控制点位移最小为目标函数,建立了优化模型.通过设定关键点与其对应目标坐标之间的距离最小达到控制支撑结构关键位置变形的目的.采用关键点的权重因子来突出优化目标的主次关系.分析了三种不同设计域情况下支撑结构的拓扑构型,研究了约束条件对拓扑结构的影响规律.支撑结构优化支柱表现为一个复合孔槽结构,右下角为类三角形的通孔并且在外表面为较大的浅槽结构.结果表明在体积减少量增加的情况下,支撑结构的最大变形和最大应力会随之增加.在最大变形不变情况下,体积减少了10.2%;在体积相当的情况下,最大变形减少了9.4%;在体积减少6.0%的情况下,最大变形减少了4.1%.

To control deformation of the support structure of dry disc brake,a topology optimization design model was proposed.Firstly,based on the variable density method,an optimization model was established with the minimum displacement of the key control points of the supporting structure as the objective function.It was arranged to control the deformation of the key position of the support structure by setting the minimum distance between the key point and its corresponding target coordinate.And then the weighting factors of key points were used to highlight the primary and secondary relationship of optimization objectives.The topological configuration of the supporting structure in three different design domains was analyzed,and the influence of constraint conditions on the topology optimization structure was studied.Finally,a composite hole and groove structure was designed for the support structure optimization pillar with a triangular-like through hole in the lower right corner and a larger shallow groove structure on the outer surface.The results show that as the volume reducing,the maximum deformation and maximum stress of the support structure will increase accordingly.In the case of the maximum displacement unchanged,the volume of the optimized support structure finally obtained can be reduced by 10.2%.In the case of the same volume,the maximum displacement can be reduced by 9.4%.When the volume is reduced by 6.0%,the maximum displacement can be reduced by 4.1%.