Wang H, Su Z, Liu C, Meng F, Song B, Zhang S. Nonlinear Vibration Analysis of Bearing-Rotor Systems with Ball Defects Considering Time-Varying Displacement Excitation. SJT [Internet]. 2026 Mar. 22 [cited 2026 May 2];8(3):1-8. Available from: https://sjtechnology.org/index.php/ojs/article/view/345