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An analysis of the causes of a BWE counterweight boom support fracture

机译：BWE配重臂支撑断裂的原因分析

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摘要

A bucket wheel excavator (BWE) collapsed in a brown coal mine. As a result of a tie rod fracture the counterweight boom, the discharge boom and several other components of the other assemblies underwent plastic deformation. This paper presents the results of computer simulations of the collapse. A finite element method analysis of the counterweight boom tie rod showed stress concentrations exceeding the allowable level. Also material tests of the fracture surface were carried out to identify the causes of the collapse. Macroscopic and microscopic images of areas within the fracture were obtained. Measurements of hardness and microhardness in the vicinity of the weld were performed. The FEM analyses and material tests showed that the causes of the collapse were design and welding faults.
机译：斗轮式挖掘机（BWE）在一个棕色煤矿中倒塌。由于拉杆断裂，配重臂杆，卸料臂杆和其他组件的其他几个部件发生塑性变形。本文介绍了崩溃的计算机模拟结果。对重臂杆的有限元分析表明，应力集中超过了允许水平。还对断裂表面进行了材料测试，以确定塌陷的原因。获得了骨折内区域的宏观和微观图像。进行焊缝附近的硬度和显微硬度的测量。有限元分析和材料测试表明，坍塌的原因是设计和焊接故障。

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