摘要
为研究碟盘振动切削破碎煤岩机构的动力学特性,建立了机构的动力学仿真模型与理论模型。基于单因素模拟实验方案采用ADAMS动力学仿真软件分析激振器不同激振频率、弹簧刚度和偏心块质量对机构的固有频率、振幅与最大激振力的影响,并与理论模型计算值进行对比分析。结果表明:由于机构正常工作频率大于其固有频率,相同激振频率下,增大弹簧刚度可提高振幅;当机构固有频率小于10 Hz、激振频率在40~60 Hz时,最大激振力随激振频率的提高而增大,数值模拟与理论计算的振幅随激振频率的增加分别衰减2.7%和2.9%;单枚偏心块质量在5~15 kg时,振幅和最大激振力随偏心块质量的增大而增大,数值模拟和理论计算的固有频率随偏心块质量的增大而分别衰减3.7%和1.6%。该研究可为碟盘振动切削破碎煤岩机构的设计和工作性能的分析提供参考。
This paper aims to investigate the dynamic characteristics of the mechanism by developing the dynamic simulation model and theoretical model of the mechanism.The investigation building on the single factor simulation experiment scheme uses ADAMS dynamic simulation software to analyze the law governing the effect of different excitation frequency,spring stiffness,and eccentric mass of the exciter on the natural frequency,amplitude,and maximum excitation force of the mechanism and provides a comparative analysis with the calculated value of theoretical model.The results show that due to the greater normal working frequency than its natural frequency in the mechanism,an increase in the spring stiffness means the increased amplitude,given the same excitation frequency;the natural frequency of the mechanism of less than 10 Hz,and the excitation frequency ranging between 40 and 60 Hz afford an increase in the maximum exciting force depending on the increase of exciting frequency,and a decrease in the amplitudes of numerical simulation and theoretical calculation by 2.7%and 2.9%respectively with the increase of exciting frequency;and the mass of single eccentric block of 5-15 kg results in an increase in the amplitudes and the maximum exciting force with the increase of eccentric block mass,and a decrease in the natural frequencies of numerical simulation and theoretical calculation by 3.7%and 1.6%respectively with the increase of eccentric block mass.This study could inform the design of the mechanism and the analysis of its working performance.
作者
刘春生
那洪亮
韩德亮
Liu Chunsheng;Na Hongliang;Han Deliang(Heilongjiang University of Science & Technology, Harbin 150022, China;School of Mechanical Engineering, Heilongjiang University of Science & Technology, Harbin 150022, China)
出处
《黑龙江科技大学学报》
CAS
2020年第3期284-290,共7页
Journal of Heilongjiang University of Science And Technology
基金
国家自然科学基金项目(51674106,51974111)。
关键词
碟盘振动机构
振动切削
煤岩
动力学特性
ADAMS
disk vibration mechanism
vibration cutting
coal rock
dynamic characteristics
ADAMS
