油气弹簧独立悬架横臂拓扑优化设计

The Topology Optimization Design of Oil and Gas Spring Independent Suspension Cross Arm

针对重型特种车独立悬架系统双横臂结构,通过建立整车多体动力学模型,计算得到上、下横臂在3倍垂直载荷、侧翻和紧急制动工况下的受力。在此基础上,借助Optistruct拓扑优化软件,基于变密度法对上、下横臂结构展开了以体积分数(质量)最小为优化目标,结构位移为约束的拓扑优化设计分析,并对拓扑优化后的上、下横臂结构进行强度校核和跑车试验验证。结果表明,在结构强度和可靠性满足设计要求的条件下,拓扑优化后上横臂结构减重10%,下横臂结构减重7.9%,取得较好的轻量化效果并且降低了制造成本。

Based on the established multi-body dynamics model of a heavy launch vehicle,the loads applied on the double-cross arm were calculated under three times load,brake and turning conditions.Then,research of topology optimization design of double-cross arm was conducted,regarding the minimum volume fraction index as optimization objective and structural displacement as constrains.Furthermore,the stresses of the double-cross arm under different loading conditions were calculated in order to verify its structural strength.The analysis results show that the structural strength and stiffness meet the design requirements,meanwhile the weight of upper cross arm was reduced by 10%,t he weight of under cross arm was reduced by 7.9%,obtained the good effect of lightweight and reduced the manufacturing cost.