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通过调研总结大型矿用挖掘机履带板破坏形式,针对性分析每种破坏产生的原因,并提出合理的校核方案。利用非线性接触分析的方法得到履带板接触应力,同时确定履带板强度分析的约束区域,有效降低因约束和加载不准确而造成的应力集中对分析结果的影响,缩减强度计算模型,加快计算速度。针对大型矿用挖掘机的静止、直行、爬坡及转向等典型工况以及极限工况,对履带板的强度进行分析,得到各部位在不同工况下的应力。分析结果验证了履带板的安全性,可为产品设计和实际运行提供理论参考。
Through the investigation and summary of the damage form of the large mining excavator track shoes, the paper analyzes the causes of each damage and puts forward the reasonable checkup plan. Nonlinear contact analysis is used to obtain the contact stress of the track shoe, meanwhile, the constraint area of the track shoe strength analysis is determined, and the influence of the stress concentration due to the restraint and loading inaccuracy on the analysis result is reduced. The calculation model of the strength is reduced and the calculation speed is accelerated . According to the typical working conditions of quarry, straight line, climbing and turning of large mining excavator, as well as the limit working conditions, the strength of the track shoe is analyzed, and the stress of each part under different working conditions is obtained. The analysis results verify the safety of track shoes, which can provide theoretical reference for product design and actual operation.