大型地下厂房结构振动反应分析

幸享林;陈建康;廖成刚;张宏战

振动与冲击 ›› 2013, Vol. 32 ›› Issue (9) : 21-27.

PDF(1256 KB)
PDF(1256 KB)
振动与冲击 ›› 2013, Vol. 32 ›› Issue (9) : 21-27.
论文

大型地下厂房结构振动反应分析

  • 幸享林1,陈建康1,廖成刚2,张宏战3
作者信息 +

Study on vibration response of large underground powerhouse

  • XING Xiang-lin1,CHEN Jian-kang1,LIAO Cheng-gang2,ZHANG Hong-zhan3
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文章历史 +

摘要

建立锦屏一级水电站地下厂房结构三维有限元动力分析模型,计算结构自振特性,并复核结构共振。通过模型水力脉动试验,获得锦屏一级水电站流道脉动压力荷载特性,用动力法分析厂房结构在机组振动荷载与水力脉动荷载作用下的振动反应,并据国内外有关规程规范对振动反应进行评价。研究结果表明,地下厂房结构与各种振源频率相差较大,不存在共振的可能性。地下厂房结构整体刚度较大,在机组振动荷载及水力脉动荷载作用下,振动位移、应力、速度均较小,满足有关规程要求。

Abstract

Characteristics of natural vibration and possible resonance of the underground powerhouse in Jinping I hydropower station were modelled and analysed with 3D dynamic finite element. Based on the model hydraulic pulse test, the turbine characteristics of fluctuating pressure loads of Jinping I hydropower were obtained. The vibration response of powerhouse structure, respectively under the unit vibration loads and the pulsating loads, were analysed by dynamic analysis and evaluated according to the related codes and specifications at home and abroad. The results show that the vibration frequencies of the underground structures are very different from that of various vibration sources, so the resonance has no way to happen. Meanwhile, because the total stiffness of the underground powerhouse structure, comparing to the unit vibration loads and the pulsating loads, is rather large, the vibration displacement, stress and velocity, respectively is small, and can meet the requirement of the related codes and specifications.

关键词

动力分析 / 水电站厂房 / 振动 / 脉动压力 / 评价

Key words

dynamic analysis / hydropower / vibration / pulsation pressure / evaluation

引用本文

导出引用
幸享林;陈建康;廖成刚;张宏战. 大型地下厂房结构振动反应分析[J]. 振动与冲击, 2013, 32(9): 21-27
XING Xiang-lin;CHEN Jian-kang;LIAO Cheng-gang;ZHANG Hong-zhan . Study on vibration response of large underground powerhouse[J]. Journal of Vibration and Shock, 2013, 32(9): 21-27

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