冲击破岩掘进机冲击机构的动态分析及优化  

DYNAMIC ANALYSIS AND OPTIMIZATION OF IMPACT MECHANISM FOR IMPACTING AND BREAKING ROCK ROADEADER

作　　者：李晓豁[1,2] 钱亚森 焦丽[1] 李岩 史尚伟 翁正洋 

机构地区：[1]辽宁工程技术大学机械工程学院,阜新123000 [2]广东文理职业学院机电工程系,湛江524400

出　　处：《机械强度》2017年第4期976-980,共5页Journal of Mechanical Strength

基　　金：国家自然科学基金项目(59774033);中国煤炭工业协会科学技术研究指导性计划项目(MTKJ2011-325)资助~~

摘　　要：为了改善冲击破岩掘进机冲击机构在周期冲击载荷作用下破岩过程的动态特性,利用应力波合成理论和有限元分析方法,对该机冲击机构进行模态分析及谐响应分析,获得了前六阶固有频率及振型和位移-频率曲线,确定了该机构的主要变形部位和各阶主振方向和三个轴向上最薄弱共振点,采用多目标遗传算法对摇臂的结构尺寸优化,减小了机构工作状态下的最大位移响应,改善了机构的动态特性,为该型掘进机冲击机构动态特性的研究与完善提供了方法和依据。In order to improve the impact mechanism of the impacting and breaking rock roadheader dynamic characteristics under the cycle impact load,the first six natural frequency and mode shape as well as the displacement-frequency curves were obtained by using stress wave synthesis theory and finite element method in the paper,the modal and harmonic response of the mechanism were analyzed,the main deformation portion and main vibration direction and three axial weakest points of the mechanism were confirmed,structure size optimization of the rocker arm were adopted with multiple objective genetic algorithm,The maximum displacement response of the mechanism was reduced,and the dynamic characteristics of the mechanism were improved,which provides a method and basis for researching and improving the dynamic performance of the mechanism.

关 键 词：掘进机 冲击机构 模态 谐响应 优化设计 

分 类 号：TD421.53[矿业工程—矿山机电]