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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。
The main study of mining automobile engine damping system nonlinear dynamics behavior. Firstly, the stability of the system is analyzed and its orbital trajectory is obtained. Based on this, Melnikov method is used to get the critical condition of the system leading to chaos. The influence of nonlinear damping coefficient and other parameters on the nonlinear dynamic behavior of the system is analyzed. Finally, the numerical calculation method is used to verify. The results show that the nonlinear damping coefficient has the greatest influence on the chaos threshold. At the same time, as the radius of the crankshaft increases, the system has the possibility of chaos. It provides a theoretical basis for designing and manufacturing vibration-damping system and improves the smoothness and comfort of mining vehicles.