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- Title
侧风作用下悬挂式单轨轨道梁动力响应分析及 减振措施设计.
- Authors
赵 威; 刘 艳; 李秋彤; 姜秀杰; 刘 欢; 陈亚楠
- Abstract
The beam of the suspension monorail is an opened steel box with a small damping ratio and prone to wind-induced vibrations, which affects the ride comfort, structural durability and train safety. Therefore, it is necessary to analyze the wind-induced vibration characteristics of the suspended monorail beam and the corresponding vibration control measures. Considering the fluid characteristics of wind, a wind-beam fluid-structure coupling model is established and verified based on the CFD and FEM, and the dynamic response of the beam is analyzed. The design of vibration reduction of the X-type shock absorber is, therefore, proposed. The correlations of spring stiffness and the damping characteristics of the damper are studied as well. The results show that under the force of 11 strong cross-wind, vortex-induced vibration near the rail beam can be induced, leading to the amplified transverse displacement response by resonance. The X-type shock absorber can effectively suppress the resonance amplification. When the stiffness is 50kN/ m and the damping is 50 kN·s/ m, the best vibration reduction effect is achieved, reducing the displacement amplitude of the rail beam by 36. 7% and the maximum vibration energy dissipation effect is obtained in 0. 2 s.
- Subjects
SHOCK absorbers; ENERGY dissipation; RESONANCE; SOIL vibration; STEEL; DURABILITY
- Publication
Railway Standard Design, 2022, Vol 66, Issue 7, p88
- ISSN
1004-2954
- Publication type
Article
- DOI
10.13238/j.issn.1004-2954.202101200002