Mechanical property of a novel vibration isolation and dampingdevice for power equipments

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Journal of Vibration and Shock ›› 2024, Vol. 43 ›› Issue (10) : 64-72.

FENG Yulong1，WANG Tonglong1，WANG Decai2，WANYAN Jianfei3，WANG Chengjian3

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Abstract

Vibration isolators can effectively reduce the high frequency vibration generated due to the use of power equipment, however, the displacement response of the equipment vibration isolator is larger under low-frequency earthquakes. The disc spring and annular friction sleeve are used as a vertical vibration isolation unit and energy dissipation unit respectively, and a vibration gap is set in the vertical energy dissipation unit to achieve a two-stage mechanism of vibration isolation in normal work and damping in earthquakes, which forms a new type of vibration isolation and damping device for power equipment. Based on the theoretical analysis, the design process of the vibration isolation and damping device is given, and an example design is conducted. The static performance analysis of the device and the dynamic performance analysis of the power equipment entire system are carried out using ABAQUS software. The results show that the numerical simulations of the device and the system proposed match well with the theoretical calculation results; the designed example achieves a two-stage vibration isolation and damping mechanism, in which the device only isolates the equipment from vibration when the equipment is working normally, and the vertical energy dissipation unit is activated under earthquakes; the vertical energy dissipation unit reduces the equipment's vertical seismic displacement response by more than 50%, and a horizontal energy dissipation unit reduces the horizontal seismic shear force of the device by more than 80%, which reduce the risk of seismic overturning and damage of the device.

Key words

Power equipment / Two-stage design / Vibration isolation and damping device / Static performance / Dynamic

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FENG Yulong1，WANG Tonglong1，WANG Decai2，WANYAN Jianfei3，WANG Chengjian3. Mechanical property of a novel vibration isolation and dampingdevice for power equipments[J]. Journal of Vibration and Shock, 2024, 43(10): 64-72

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