School of Control Engineering;
Northeastern University at Qinhuangdao;
Qinhuangdao 066004;
Hebei;
China;
School of Electrical Engineering;
Yanshan University;
Qinhuangdao 066004;
Hebei;
China;
Vertical-horizontal coupling; Nonlinear vibration; Mixed lubrication; Dynamic rolling force; Main resonance; Amplitude-frequency characteristic;