迈步过程接触刚度变化对超前支架动态响应影响分析

发布时间：2018-05-11 04:36

本文选题：超前支架 + 接触刚度　；参考：《中国机械工程》2017年12期

【摘要】：通过数值仿真和实验方法对超前支架迈步过程的动态响应特性进行研究。使用块系覆岩理论构造超前支架与顶板的耦合动力学模型。以超前支架与顶板接触刚度变化模拟超前支架的迈步过程。将超前支架迈步过程与顶部接触刚度设定为阶跃突变方式、指数型、直线型和对数型方式进行变化,研究此过程顶板、第一和第二支撑组的动态响应。使用MATLAB建立超前支架迈步过程动力学微分方程,并使用四阶龙格库塔计算方法对超前支架迈步过程的动力学问题进行求解。仿真和实验结果表明,使用阶跃突变方式进行支架迈步过程接触刚度的控制时,会引起顶板和各个支撑组的剧烈振动。使用对数型、直线型和指数型刚度变化方式进行迈步过程控制,能够减小顶板、第一和第二支撑组的振动量,并且三种方式减小振动量的效果逐渐递增。
[Abstract]:The dynamic response characteristics of the step-ahead support are studied by numerical simulation and experiment. The coupling dynamic model of leading support and roof is constructed by using block system overburden theory. The change of contact stiffness between the lead support and the roof is used to simulate the stepping process of the lead support. The dynamic response of the roof, the first and the second bracing groups was studied by setting the step change mode, exponential type, linear type and logarithmic mode of the step and the top contact stiffness of the leading bracket. The dynamic differential equation of advance support stepping process is established by MATLAB, and the dynamic problem of leading support stepping process is solved by using the fourth order Runge-Kutta method. The simulation and experimental results show that the control of the contact stiffness of the support by using the step mutation method will cause the strong vibration of the roof and the support groups. The change of logarithmic, linear and exponential stiffness can reduce the vibration of the roof, the first and the second bracing groups, and the effect of decreasing the vibration is increasing gradually.
【作者单位】：辽宁工程技术大学机械工程学院;
【基金】：国家自然科学基金资助项目(51304107) 辽宁省教育厅创新团队项目(LT2013009);辽宁省教育厅重点实验室项目(LJZS006)
【分类号】：TD353

【共引文献】