摘要
地下矿山岩层的地质构造非常复杂,存在着不规则的岩石结构、孔隙分布以及断裂带等。这种不规则性导致异常特征之间产生强烈的耦合干扰,从而使得掘进机械刀盘在岩层中挖掘时,异常振动特征的频率响应变得难以确定。为了解决这一问题,研究地下矿山开采掘进机刀盘异常振动的频率响应特征。结合能量传递转换规律与刀盘运动学原理,深入分析了掘进机刀盘异常振动的频率响应特征。通过计算和测量刀盘能量,建立了振动与能量的对应关系方程,结合能力和频率的关系,分析刀盘异常振动对应的频率特征,从而进行异常振动特征的频率响应分析。实验结果表明:通过设定刀盘的出刀前角度数、刀盘旋转速度和刀盘进给速度,可以得出能量-频率、能量-振动、频率-振动三者的响应关系曲线,得出刀盘发生异常振动的主要因素,该方法为地下矿山开采掘进机的优化设计和作业效率提升提供了重要的理论依据和实践指导。
The geological structure of underground mining rock layers is very complex,with irregular rock structures,pore distribution and fault zones.This irregularity leads to strong coupling interference between abnormal features,making it difficult to determine the frequency response of abnormal vibration characteristics when the excavation machinery cutterhead excavates in rock layers.To solve this problem,the frequency response characteristics of abnormal vibration of the cutterhead of underground mining and excavation machines are studied.By combining the law of energy transfer and conversion with the principle of cutterhead kinematics,the frequency response characteristics of abnormal vibration of the cutterhead of a tunneling machine are analyzed in depth.By calculating and measuring the energy of the cutterhead,a corresponding equation between vibration and energy is established.Combining the relation between capacity and frequency,the frequency characteristics corresponding to abnormal vibration of the cutterhead are analyzed,and the frequency response analysis of abnormal vibration characteristics is carried out.The experimental results show that by setting the degree of the front foot of the cutterhead,the rotation speed of the cutterhead and the feed speed of the cutterhead,the response curves of energy frequency,energy vibration and frequency vibration can be obtained.And the main factors causing abnormal vibration of the cutterhead can be identified.This method provides important theoretical basis and practical guidance for the optimization design and operation efficiency improvement of underground mining tunneling machines.
作者
荆忠亮
李洪宇
赵丽
王超
JING Zhongliang;LI Hongyu;ZHAO Li;WANG Chao(Department of Mechanical Engineering,Shanxi Institute of Technology,Yangquan Shanxi 045000 China;College of Ocean Science and Engineering,Shandong University of Science and Technology,Qingdao Shandong 266590,China)
出处
《机械设计与研究》
CSCD
北大核心
2024年第6期128-132,139,共6页
Machine Design And Research
基金
首批教育部新工科研究与实践项目(2-6-07)
山西省高等学校教学改革创新项目(J20221238,J2020391,J2019223,J2018212)
山西省高等学校大学生创新创业训练计划项目(2021990)
阳泉市科技研发项目(2022JH052,2020YF046,2019G12)。
关键词
频率响应
能量响应
机械刀盘振动
振动激励
刀盘推进力
frequency response
energy response
mechanical cutter head vibration
vibration excitation
knife disc propulsion force
