工程设计学报Issue(1)：56-61,6.DOI:10.3785/j.issn.1006-754X.2014.01.010
井下移动式破碎机垂直方向随机振动响应的研究
Study on vertical random vibration response of underground mobile crusher
摘要
Abstract
In order to explore the vertical vibration characteristics of an underground mobile crusher and reasons of its low working reliability under a random load ,the dynamic models and motion equations in vertical direction were built according to the theory of multi-body dynamics and the mathematical model of vertical vibration response was derived based on the pseudo excita-tion method by some hypothesis and simplification .Taking a domestic underground mobile crush-er as an example ,random load on the head of the crusher impacting rocks was determined .By u-sing MATLAB ,the random vibration response of the crusher head ,arm and body under the ac-tion of random load in high stand conditions were obtained .The results show that under the ac-tion of random excitation w hose peak load is 375 kN ,mean load is 186 kN ,and frequency is 10 Hz ,the peak/mean amplitudes of the machine parts are :crusher head 0.012 5 m/0.007 25 m ;arm 0.010 m/0.006 57 m ;body 0.006 1 m/0.003 62 m .The vibration of every part is violent and the degree of vibration and volatility are ordered from maximum to minimum as follows :the crush head ,the arm ,the body .And this is consistent with the actual situation .At the maximum amplitudes of every part ,the low frequency of crusher head ,arm and body are close to the natu-ral frequency and it is easy to occur resonance w hich is the main reason leading machine vibration , leading the machine part failure ,and reducing the service life .T he results offer reference to im-prove mobile breaker design ,take reasonable vibration reduction measures ,and prolong the ma-chine service life .关键词
移动式破碎机/多体动力学/随机载荷/响应Key words
mobile crusher/multi-body dynamics/random load/response分类
矿业与冶金引用本文复制引用
李晓豁,刘藏泽,孟冉,吴云..井下移动式破碎机垂直方向随机振动响应的研究[J].工程设计学报,2014,(1):56-61,6.基金项目
国家自然科学基金资助项目（59774033）；中国煤炭工业协会科学技术研究指导性计划项目（M T K J2011-325）；辽宁省第二批科学技术计划项目（2008403010）． （）
