碟盘振动切削煤岩机构的动力学模型与幅频特性  

Dynamic model and amplitude frequency characteristics of disc vibration cutting mechanism for coal and rock

作　　者：刘春生[1] 韩德亮 那洪亮 Liu Chunsheng;Han Deliang;Na Hongliang(Heilongjiang University of Science & Technology, Harbin 150022, China;School of Mechanical Engineering, Heilongjiang University of Science & Technology, Harbin 150022, China)

机构地区：[1]黑龙江科技大学,哈尔滨150022 [2]黑龙江科技大学机械工程学院,哈尔滨150022

出　　处：《黑龙江科技大学学报》2020年第5期499-504,共6页Journal of Heilongjiang University of Science And Technology

基　　金：国家自然科学基金项目(51674106,51974111)。

摘　　要：为分析碟盘振动切削破碎煤岩机构的动力学特性,构建了机构空载动力学等效模型,分析其幅频与相频特性,利用ADAMS软件建立了虚拟样机模型,模拟不同频率下其振幅变化过程,通过搭建碟盘振动切削破碎煤岩实验台分析空载实验机构的固有频率与稳态振幅。结果表明,机构固有频率约为9 Hz、稳态振幅约为2 mm,理论计算和数值模拟所得固有频率与实验所测相对误差分别为3.5%和2.7%。理论计算与实验测得不同频率下的振幅相对误差最大为18.6%、最小为2.1%,数值模拟与实验所测相对误差最大为12.9%、最小为0.2%,三种方法所得振幅随频率变化规律一致。该研究为碟盘振动切削破碎煤岩机构动力学特性的深入分析提供了参考。This paper intends to analyze the dynamic characteristics of the disc vibration mechanism for cutting and crushing coal rock.The study is focused on the efforts to develop the mechanism airborne dynamics equivalent model,analyze its amplitude and phase frequency characteristics,build a virtual sample model using ADAMS software to simulate the amplitude change process at different frequencies,and analyze the inherent frequency and steady-state amplitude of the empty-loaded experimental mechanism by constructing the disc vibration cutting and crushing coal rock laboratory.The results show that given the natural frequency of the mechanism of about 9 Hz and the steady amplitude of about 2 mm,the relative errors observed between the natural frequency derived from theoretical calculation and numerical simulation and that from experimental measurement are 3.5%and 2.7%respectively;for the amplitude at different frequencies,the maximum and minimum relative errors between theoretical calculation and experimental measurement are 18.6%and 2.1%respectively;the maximum and minimum relative errors between numerical simulation and experimental measurement are 18.6%and 2.1%respectively,suggesting that the three methods point to the law of how amplitude varies with frequency.This research lays the foundation for the in-depth analysis of the dynamics characteristics of the disc vibration cutting crushed coal rock mechanism.

关 键 词：碟盘 振动切削 煤岩 激振频率 振幅 

分 类 号：TD421.5[矿业工程—矿山机电]