【摘要】 主要研究矿用汽车发动机减振系统的非线性动力学行为。首先分析系统的稳定性,求出其异宿轨道,在此基础上利用Melnikov方法得到系统通向混沌的临界条件,并分析系统中非线性阻尼系数等参数对其非线性动力学行为的影响,最后利用数值计算方法进行验证。结果表明:非线性阻尼系数对混沌阈值的影响最大;同时随着曲轴半径的增大,系统存在着混沌的可能性。为设计与制造减振系统提供理论依据,改善矿用汽车平顺性和舒适性。更多还原

【Abstract】 The nonlinear behavior of mine automotive engine damping system was studied in this paper.Firstly,investigated stability of the system and obtained the hetrolinic orbit.Secondly,gained the critical value of chaos by Melnikov method and studied the influence of system parameters on the nonlinear dynamic behavior.Finally,the conclusion is validated that nonlinear damping coefficient is the biggest effect factors of chaotic threshold and the system will has the possibility of chaos when the crankshaft radius increases.The research Provide theoretical basis for designing and manufacturing damping system to improve the comfort of mine automobile.更多还原