开沟铺管机高程主控臂轻量化设计

高程主控臂是开沟铺管机执行机构中的关键部件，其结构强度决定整机运行可靠性，质量大小影响高程控制响应速度。结合实际作业工况，基于有限元方法，通过静力学分析、瞬态动力学分析得到高程主控臂力学特性。基于力学特性，通过定义设计变量、约束条件及优化目标，对高程主控臂结构进行尺寸优化。结果表明，优化前的结构稳定性偏于保守，远高于设计使用需求，优化后的结构虽然减小了板厚，但通过数据分析对比，结构抗失稳系数依旧保持在合理范围内，证明结构优化合理。研究方法与结果为开沟铺管机高程主控臂的结构设计提供了参考。 

Lightweight Design of Level Control Arm for Trench Pipe Installation Machines

Level control arm is key component of trench pipe installation machines actuator.Its structural strength determines operation reliability of complete appliance，and its centroid position affects response speed of level control.Combined with working conditions，based on finite element method，mechanical characteristics of level control arm were obtained through static analysis and transient dynamic analysis.Based on mechanical characteristics，size of level control arm was optimized by defining design variables，constraints and optimization objectives.The analysis results showed that structural stability before optimization was much higher than actual demand.Optimized structure reduced shell thickness，but through data analysis and comparison，structural safety factor remained in a reasonable range.It proved that structure optimization was reasonable.Research methods and results could provide a reference for level control arm of trench pipe installation machines in structural design.