大型挖掘机登机梯的仿真及分析

Simulation and Analysis of Boarding Ladder for Large Excavator

针对大型正铲机械式挖掘机登机梯在使用中出现的问题,设计了一款新型登机梯。与旧有登机梯相比,新型登机梯在结构、样式等方面进行了轻量化及优化改进;使用设计软件NX建立了新型登机梯三维模型,应用其仿真模块(ADAMS)模拟了气缸推力随登机梯旋转的变化情况,根据推力变化情况,采用有限元分析模块(NASTRAN)对登机梯受力情况进行分析,确保了登机梯的结构强度及刚度。

Aiming at the problems of the boarding ladder applied in large shovel mechanical excavators, this paper develops a new type of boarding ladder. Compared with the old boarding ladder, the structure and style of the new boarding ladder are lightened and improved. It builds the three-dimensional model of the ladder using the design software NX, and uses its simu- lation module （ADAMS） to simulate the change of cylinder thrust with the rotation of the boarding ladder. According to the change of thrust, the finite element analysis module（NASTRAN）is used to analyze the force of the ladder to ensure the struc- tural strength and rigidity of the ladder.