考虑人体受振因素的水电站厂房振动分析及评价

发布时间：2018-03-22 09:16

本文选题：主厂房　切入点：振动　出处：《水力发电》2017年06期 　论文类型：期刊论文

【摘要】：为明确人体受振评价的基本原则和应用方法,结合两个版本的人体暴露于全身振动的国际标准,阐述了建立主厂房人体受振评价标准的三个关键因素:控制目标、评价方法和具体标准,其中振动控制目标定为舒适层次还是健康层次为构建主厂房人体受振评价标准的根本。在此基础上,结合洪屏水电站执行脉动压力激振下的时程分析,评价楼板结构振动下人体的受振情况。结果表明:发电机层楼板的振动主要由转轮叶片数频率及其倍频的脉动压力成分引起,振动评价时必须考虑频率成分对人体的影响。频率计权均方根加速度作为基本评价指标相对频谱方法具有更好的实用性和普适性。无论振动控制目标选为舒适层次还是健康层次,该电站楼板的振动都能够满足国际标准的要求。
[Abstract]:In order to clarify the basic principles and application methods of human vibration evaluation, combined with two versions of international standards for human body exposure to full-body vibration, this paper expounds three key factors for establishing the evaluation standard of human vibration in main workshop: control goal. The evaluation method and concrete standard, in which the vibration control target is defined as comfort level or health level, is the basis of constructing the evaluation standard of human body vibration in main powerhouse. On this basis, the time-history analysis under pulsating pressure excitation is carried out in combination with Hongping Hydropower Station. The results show that the vibration of floor slab of generator is mainly caused by the frequency of runner blade and the fluctuating pressure component of frequency doubling. The influence of frequency component on human body must be taken into account in vibration evaluation. The frequency weighted RMS acceleration as the basic evaluation index has better practicability and universality than the spectrum method. No matter the vibration control target is chosen as the comfort layer. The next level of health, The floor vibration of the power station can meet the requirements of international standards.
【作者单位】：长江勘测规划设计研究有限责任公司;长江科学院;武汉大学水资源与水电工程科学国家重点实验室;
【基金】：国家自然科学基金资助项目(51679175)
【分类号】：TV312

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