基于逐步递推法不同俯仰角采煤机静力学分析
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摘要
针对采煤机行走机构的低速重载大跨度支撑静不定问题,基于逐步递推理论方法,求解了滑靴载荷的变化规律。考虑采煤机实际工况下不同俯仰角对采煤机整机力学性能的影响,采用小变形协调理论简化了采煤机整机静力学模型,编制MATLAB程序对其进行求解与分析。通过模拟采煤机实际井下工况,对采煤机后平滑靴载荷进行试验研究,并将试验值与仿真值进行对比分析,结果表明:利用逐步递推法来求解采煤机整机静力学方程具有一定的准确性。
The shearer's walking mechanism suffers the statics-related problem due to its low-speed,heavy-duty and longspan support. In this article,based on the stepwise recursive method,the analysis is conducted on the influence of different pitch angles upon the dynamics of the shearer body under the working conditions. By means of the small-deformation coordination theory,the static model of the shearer body is simplified,and via the traditional approach and the MATLAB program,the model is analyzed and solved. By simulating the actual working conditions where the shearer is operating beneath the well,a test is carried out on the force of the shearer's back smooth feet,and the values are compared with those simulated values. The results show that the traditional approach ensures a certain standard of accuracy for solving the static equation of the shearer body.
The shearer's walking mechanism suffers the statics-related problem due to its low-speed,heavy-duty and longspan support. In this article,based on the stepwise recursive method,the analysis is conducted on the influence of different pitch angles upon the dynamics of the shearer body under the working conditions. By means of the small-deformation coordination theory,the static model of the shearer body is simplified,and via the traditional approach and the MATLAB program,the model is analyzed and solved. By simulating the actual working conditions where the shearer is operating beneath the well,a test is carried out on the force of the shearer's back smooth feet,and the values are compared with those simulated values. The results show that the traditional approach ensures a certain standard of accuracy for solving the static equation of the shearer body.
引文
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[2]赵丽娟,田震,刘旭南,等.薄煤层采煤机滚筒载荷特性仿真分析[J].系统仿真学报,2015,27(12):3102-3108.
[3]田立勇,毛君,王启铭.基于采煤机摇臂惰轮轴受力分析的综合煤岩识别方法[J].煤炭学报,2016,41(3):782-787.
[4]徐卫鹏.采煤机导向滑靴新材料的强度与耐磨性研究[J].机械制造,2016,54(12):39-41.
[5]李玉标.关于采煤机导向滑靴质量提升的研究[J].价值工程,2014,33(2):35-36.
[6]赵丽娟,刘旭南,马联伟.基于经济截割的采煤机运动学参数优化研究[J].煤炭学报,2013,38(8):1490-1495.
[7]陈洪月,白杨溪,刘占胜,等.随机激励下采煤机行走方向的振动特性分析[J].机械设计,2017,34(2):39-44.
[8]陈洪月,张坤,袁智,等.基于阻力测试的采煤机结构受力分析[J].中国机械工程,2016,27(19):2646-2651.
[9]杨丽伟.滚筒式采煤机整机力学模型理论和分析方法的研究[D].上海:煤炭科学研究总院,2006:6-22.
[10] Mazurkiewicz D. Empirical and analytical models of cuttin process of rocks[J]. Journal of Mining Science,2000,36(5):481-486.
[11] Hekimoglu O Z,Ozdemir L. Effect of angle of wrap on cutting performance of drum shearers and continuous miners[J].Mining Technology,2004,113(2):118-122.