多自由度刨煤机动力学模型的建立与仿真

康晓敏;李贵轩

振动与冲击 ›› 2010, Vol. 29 ›› Issue (7) : 139-144.

PDF(1632 KB)
PDF(1632 KB)
振动与冲击 ›› 2010, Vol. 29 ›› Issue (7) : 139-144.
论文

多自由度刨煤机动力学模型的建立与仿真

  • 康晓敏;李贵轩
作者信息 +

Multi-degree-of-freedom dynamic model of coal plough and simulation

  • KANG Xiao-min;LI Gui-xuan
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摘要

在单自由度刨煤机动力学模型的基础上,根据刨煤机的实际运行工况,建立了刨煤机多自由度非线性动力学模型,其中考虑了随机的煤壁作用力、刨链预紧力、链轮多边形效应因素的影响。并采用MATLAB/Simulink进行数值求解和仿真,得到了在各因素影响下刨头速度和刨链张力的变化状态。结果表明随机煤壁作用力和刨链预紧力对刨头速度和刨链张力变化的影响较大,链轮多边形效应影响较小,并且随机的煤壁作用力弱化了链轮多边形效应的影响。对多自由度和单自由度刨煤机动力学模型进行了比较分析,得出各种因素的影响规律是一致的,多自由度动力学模型更符合实际工况。为分析刨煤机动力学问题以及提高刨链可靠性提供理论基础。

Abstract

Based on single-degree-of-freedom(single-DOF)dynamic model of a coal plough and according to actual work conditions of a coal plough, multi-degree-of-freedom(multi -DOF) nonlinear dynamic model of a coal plough was presented. And the factors of stochastic forces of coal, pretension force of chain and sprocket polygon effect were considered for the dynamic model. MATLAB/Simulink soft ware was used to get numerical solution and simulation, and the changes of the plough body velocity and the chain tension were gained under the influence of each factor. The results showed that influences of forces of coal and pretension force of chain obvious on the plough body velocity and the chain tension, influence of sprocket polygon effect is less, and stochastic forces of coal reduce the influence of sprocket polygon effect. Comparing single-DOF dynamic model with multi-DOF dynamic model, the change under the influence of each factoris the same, and single-DOF dynamic model can be as reference for simple analysis of coal plough, but multi-DOF dynamic model accords with actual working conditions more. It provides theoretical basis for analyzing dynamic problem of coal plough and improving the reliability of plough chain.

关键词

刨煤机 / 多自由度 / 力学模型 / 刨削阻力 / 刨链预紧力 / 链轮多边形效应

Key words

coal plough / multi-degree-of-freedom(multi –DOF) / dynamic model / cutting resistance / pretension force of chain / sprocket polygon effect

引用本文

导出引用
康晓敏;李贵轩. 多自由度刨煤机动力学模型的建立与仿真[J]. 振动与冲击, 2010, 29(7): 139-144
KANG Xiao-min;LI Gui-xuan. Multi-degree-of-freedom dynamic model of coal plough and simulation[J]. Journal of Vibration and Shock, 2010, 29(7): 139-144

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