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针对大型自移式破碎站卸料臂结构设计中存在的问题,采用理论分析和数值仿真相结合方法,分析卸料臂结构几何和受力特征,建立数值仿真模型,对三种典型工况下力学行为进行仿真分析和结构优化.结果表明:在恶劣气候下工作时,卸料臂结构始端处横梁发生较大扭转变形,且应力过大,结构安全系数偏低,原设计结构不适于工作在大风高寒地区.优化后,原卸料臂结构始端处横梁的工字型截面设计为箱型截面,结构受力合理,在大风高寒环境下的承载能力大幅提高.
Aiming at the problems existing in the structure design of unloading arm of large-scale self-moving crusher, the geometrical and mechanical characteristics of the unloading arm are analyzed by the combination of theoretical analysis and numerical simulation. The numerical simulation model is established. Under three typical conditions The results show that when working in bad weather, the beam at the beginning of the unloading arm structure undergoes large torsional deformation, and the stress is too large, the structural safety factor is low, the original design structure is not suitable for working in the Windy and alpine region.Optimized, the I-shaped cross-section of the beam at the beginning of the original unloading arm structure is designed as a box section, the structure is reasonable and its carrying capacity under high-wind and high-cold environment is greatly increased.