Theoretical analysis and tests for mechanisms of viscoelastic damping ring as a dynamic absorber and vibration amplification of flywheel in launching phase
HUANG Xiuchang 1 Ding Quanhui 1 WANG Yong 2 WANG Sen 2 HUA Hongxing 1
1.Institute of Vibration, Shock and Noise, School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China;
2.Shanghai Aerospace Control Technology Research Institute, Shanghai 200233, China
Abstract:Flywheels will undergo resonance amplification under the excitation of vibration and shock of the interface in the launching phase. To suppress this resonance amplification, friction ring has been advanced. However, there were few published literatures on this topic. Aimed at this problem, the theoretical dynamic model is established based on finite element method, the mechanisms of resonance amplification and suppression of friction ring are revealed. An equivalent multi-degrees-of-freedom model is built to get the optimal damping for friction ring. It is demonstrated that the “flap mode” is the modes that result in the amplification and the friction ring works based on two mechanisms, the first one is dynamic vibration absorber for one mode of the friction ring that interacts with the “flap mode” of the flywheels; the second one is the viscoelastic damping that dissipates the energy. Experimental study is carried out and the comparative results concerning frequency response functions are employed to verify the theoretical findings.
黄修长 1,丁泉惠 1,王勇 2,王森 2,华宏星 1. 发射段阻尼环对飞轮轮体振动放大的粘弹性阻尼动力吸振抑振机理分析和试验研究[J]. 振动与冲击, 2019, 38(9): 266-270.
HUANG Xiuchang 1 Ding Quanhui 1 WANG Yong 2 WANG Sen 2 HUA Hongxing 1 . Theoretical analysis and tests for mechanisms of viscoelastic damping ring as a dynamic absorber and vibration amplification of flywheel in launching phase. JOURNAL OF VIBRATION AND SHOCK, 2019, 38(9): 266-270.
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