采煤机整机非线性静力学特性研究

发布时间：2018-05-21 19:27

本文选题：采煤机 + Levenberg-Marguardt算法　；参考：《煤炭学报》2017年11期

【摘要】：为研究大跨度、过约束条件下采煤机支撑滑靴受力特点,考虑采煤机倾角及俯仰角等因素影响,构建了18个载荷下的采煤机整机静力学模型,针对模型系数矩阵的不确定性,提出采用改进凝聚函数对采煤机静力学方程的绝对值系数矩阵进行了处理,获取修正后的光滑非线性方程组,将截割实验下的滚筒三向力载荷作为输入激励代入到静力学方程中,再利用Levenberg-Marguardt算法对方程组进行求解,得到各滑靴受力的理论计算值,并与实际测量值进行比较,误差范围在10%以内,验证了理论模型的正确性。采用控制变量法分别改变采煤机倾角和俯仰角的取值,研究采煤机倾角和俯仰角变化对采煤机各滑靴受力的影响。研究结果表明:采煤机倾角变化对前后导向滑靴侧推力影响较大,对前后导向滑靴以及平滑靴支撑力影响较小;采煤机倾角变化对各滑靴受力均有一定的影响,且受力变化呈近似线性关系。
[Abstract]:In order to study the mechanical characteristics of shearer support slippers under long span and overconstraint conditions, considering the influence of shearer inclination angle and pitch angle, the statics model of shearer under 18 loads is constructed, and the uncertainty of the model coefficient matrix is pointed out. An improved condensing function is proposed to deal with the absolute coefficient matrix of the static equation of the shearer, and the modified smooth nonlinear equations are obtained. The three-dimensional force load of the cylinder in the cutting experiment is put into the statics equation as input excitation, and then the equations are solved by Levenberg-Marguardt algorithm, and the theoretical calculation value of the force on each slide shoe is obtained, and the results are compared with the actual measurement value. The error range is less than 10%, which verifies the correctness of the theoretical model. The control variable method is used to change the inclination and pitch angle of the shearer, and the influence of the variation of the inclination angle and the pitch angle of the shearer on the sliding boots of the shearer is studied. The results show that the change of shearer inclination has a great influence on the lateral thrust of the front and rear guide slippers, but has little effect on the supporting force of the front and rear guide skates and smooth boots, and the variation of the shearer inclination angle has a certain effect on the forces on the sliding boots. The change of force is approximately linear.
【作者单位】：辽宁工程技术大学机械工程学院;煤炭工业协会高端综采成套装备动力学测试与大数据分析中心;
【基金】：国家能源研发(实验)中心重大资助项目(2010_215) 国家自然科学基金资助项目(51774162)
【分类号】：TD421.6

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