Abstract：As a widely used passive vibration control device, the fluid viscous damper exhibits mechanical performance alteration throughout the entire service life. To explore the mechanical parameter changing mode and reveal the mechanism of performance alteration, experimental and simulation studies were conducted with oil leakage and temperature effects as the main influencing factors. Firstly, cyclic tests and viscousity-temperature analysis were carried out on viscous dampers under different oil leakage levels and ambient temperatures, respectively. Secondly, fluid dynamics simulations were performed to obtain the alternating tendency of the hysteresis performance. Finally, an analytical model reflecting the performance alteration of viscous dampers under combined oil leakage and temperature effects was established and verified. The results show that oil leakage will cause a “zero-force gap” appearing in the hysteresis loop, of which the length is proportional to the leakage level. Temperature increase will lead to a decrease in the damping coefficient, which affects the peak damping force. The established performance alteration model can accurately reflect the changes in mechanical performance of viscous dampers.
杨孟刚1，曹恺悦1，李新2，胡尚韬 1. 考虑泄漏和温度效应的黏滞阻尼器性能演变研究[J]. 振动与冲击, 2024, 43(8): 169-177.
YANG Menggang1,CAO Kaiyue1,LI Xin2,HU Shangtao1. A study on the damping performance alteration of a fluid viscous damper considering oil leakage and temperature variation effect. JOURNAL OF VIBRATION AND SHOCK, 2024, 43(8): 169-177.
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