摘要
为研究在不同加载条件下液压支架的承载状况,分析液压支架铰接点载荷的变化趋势,文章以ZF5600/16.5/26放顶煤液压支架为例,利用LS-Dyna建立液压支架动力学模型,在铰接处建立刚性节点区域,定义转动副连接以便力的传递。随后结合加载形式和加载工况,对液压支架数值模拟仿真分析。结果表明:在内、外加载形式下顶梁应力集中的区域分别为前、后柱窝;在内加载中铰接点载荷波动大且峰值远大于稳定值;在偏心加载工况下铰接点载荷波动最剧烈;不同工况中后连杆铰接点载荷在力传递过程中所需稳定时间最长。研究结果可为液压支架的结构强度设计和可靠性分析提供参考。
In order to study the bearing capacity of hydraulic support under different loading conditions,the change trend of hinge point load of hydraulic support is analyzed,taking ZF5600/16.5/26 top coal caving hydraulic support as an example,the dynamic model of the support is built using LS-Dyna,the rigid joint area is established at the hinge,and the rotation pair connection is defined to transfer the force.Subsequently,combining with different loading forms and loading conditions,the numerical simulation analysis of hydraulic support is carried out.The results show that the stress concentration areas of the top beam are the front column nest and the rear column nest under internal and external loading,respectively;the load of hinge point fluctuates greatly and the peak value is much larger than the stable value under internal loading;under eccentric loading condition,the load of hinge point fluctuates most violently;in different working conditions,the load at the hinge point of the rear connecting rod needs the longest stability time in the force transfer process.
作者
曾庆良
李兆基
万丽荣
杨扬
祝衍鹏
ZENG Qing-liang;LI Zhao-ji;WAN Li-rong;YANG Yang;ZHU Yan-peng(College of Mechanical and Electronic Engineering,Shandong University of Science and Technology,Qingdao,Shandong 266590,China)
出处
《煤炭工程》
北大核心
2022年第8期168-173,共6页
Coal Engineering
基金
国家自然科学基金资助项目(51974170)。
关键词
液压支架
加载条件
承载状况
铰接点载荷
hydraulic support
loading conditions
carrying status
hinge point load
