低位放顶煤反四连杆过渡支架关键部件设计研究

针对正四连杆放顶煤过渡支架极易出现前后排立柱受力不均衡以及放顶煤过渡支架在冲击载荷的作用下易导致主要承载结构疲劳性失稳破坏的问题,以反四连杆放顶煤过渡支架的主体结构件顶梁和底座为研究对象,运用SolidWorks建立顶梁和底座的三维模型,利用ANSYS Workbench有限元软件对零部件进行疲劳寿命分析.基于对顶梁与...

Design and Research on Key Components of Low Position Top Coal Anti-four-link Transition Support

Abstract: Aiming at the problem that the front four-bar caving coal transition support is prone to uneven load on the front and rear columns and the caving coal transition support is likely to cause fatigue instability and failure of the main bearing structure under the impact load. Taking the top beam and base of the main structural parts of the anti-four-link caving coal transition support as the research object, the three-dimensional model of the top beam and base was established using SolidWorks, and the fatigue life analysis of the components was performed using the ANSYS Workbench finite element software. By analyzing the life cloud diagram, damage cloud diagram and fatigue sensitivity characteristic curve of the top beam and base, the maximum cumulative fatigue damage of the top beam and base and the parts prone to fatigue failure are obtained. The design research results show that the designed top beam and base have a small amount of deformation under load, and the maximum fatigue cumulative damage ratio of the top beam and base is less than 1, which satisfies the structural design life of each part of the transition bracket is less than the usable life.