一种柔性支承转子系统的地震动响应分析

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摘要以工作在柔性支承上的超高速转子系统为对象，研究支撑框架对系统地震动响应的影响。采用欧进萍改进的地震波模型作为输入载荷，碰摩力模型模拟动静件之间的碰摩过程，以拉格朗日方法建立了系统的动力学模型。计算分析了支撑框架对地震动响应中时域波形、碰摩时间、最大振幅的影响。结果表明，转子系统和支撑框架地震动响应呈现出一致的规律，转子振幅约是支撑框架的1.5倍；最大振幅和碰摩时间随支撑框架刚度单调增长、随质量单调减小、随阻尼单调减小；支撑框架基频是影响转子系统地震动响应的关键因素；在工程设计中应先从保持基频不变的思路出发，如果支撑框架质量增加不可避免，而刚度又增无可增，则可增加支撑框架上的阻尼。
关键词：超高速；支撑框架；地震动响应

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	白宇杰1
	李诗图2
	杨璇3

关键词 ：超高速, 支撑框架, 地震动响应

Abstract：The seismic response of a flexibly connected ultra-high speed rotor system using different support frames is studied. With the Ou Jinping-modified-earthquake model as input vibration wave and the rub-impact model as interaction of different bodies, the governing equation was obtained using Lagrange theory. Influence of the support frame on time domain vibration, max interacting amplitude, rub-impact lasting time, in seismic response was analyzed. It was shown that time domain response of the rotor and support frame is similar with the amplitude is about 1.5 times; max interacting amplitudes and rub-impact lasting times both increase with support frame stiffness, decrease with mass and damping monotonically; the key factor in seismic response is fundamental frequency of the support frame; when designing the support frame the constant fundamental frequency is recommended.
Key words：ultra-high speed; support frame; seismic response

Key words： ultra-high speed support frame seismic response

收稿日期: 2021-08-11 出版日期: 2022-11-15

引用本文:

白宇杰1，李诗图2，杨璇3. 一种柔性支承转子系统的地震动响应分析[J]. 振动与冲击, 2022, 41(21): 292-298.
BAI Yujie1, LI Shitu2, YANG Xuan3. Seismic response analysis of an ultra-high speed rotor system with flexible supports. JOURNAL OF VIBRATION AND SHOCK, 2022, 41(21): 292-298.

链接本文:

http://jvs.sjtu.edu.cn/CN/ 或 http://jvs.sjtu.edu.cn/CN/Y2022/V41/I21/292

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