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煤在装载过程中,其密度在冲击载荷作用下呈现非均匀性,同时箕斗存在加速提升过程。以煤矿50t箕斗为研究对象,建立了冲击载荷下煤密度线性分布以及箕斗加速提升时的斗箱侧壁承载力学模型,为箕斗可靠性分析提供了更合理的边界载荷条件。采用ANSYS中APDL语言建立箕斗有限元模型,求解得到不同状态下箕斗应力云图。结果表明,上下斗箱连接角钢应力值基本保持不变,最大应力的槽钢位于下斗箱中部,槽钢最大应力值在箕斗加速提升时比煤密度为常数时增大13.1%。
In the process of loading coal, the density of the coal is non-uniform under the impact load, and the skip accelerates the process of lifting. Taking coal bucket 50t as the research object, the load-bearing mechanical model of the side wall of the bucket when the coal density is linearly distributed under the impact load and the skip is accelerating is established, which provides a more reasonable boundary load condition for the bucket reliability analysis. The ANSYS APDL language is used to establish the skip finite element model, and the stress cloud of skip under different states is obtained. The results show that the upper and lower hopper connecting angle steel stress remains unchanged, the maximum stress channel is located in the middle of the lower hopper, and the maximum channel stress increases by 13.1% when the skip accelerates.