考虑地基辐射阻尼的灯泡贯流泵房水力振动分析
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摘要
根据测点的脉动压力时程,构造整个流道的脉动压力场,通过三维有限元数值模拟对淮阴三站泵房进行了水力振动时程分析,计算了新型的灯泡贯流泵房的动力响应。和常规无质量地基模型的计算结果作对比,考虑地基辐射阻尼会使泵房的动力响应值最大降低50%左右,地基辐射阻尼对淮阴三站动力响应的影响比较显著。同时,根据相关控制标准,对泵房振动进行评价,为工程抗振设计提供依据。
On the basis of the pulsating pressure of the measuring locations, the pulsating pressure field of the whole flow passage is structured. The hydraulic vibration time-history analysis of the pump-house of Huaiyin Sanzhan pumping station was made by using 3D finite element numerical simulation, and then the dynamic response of new bulb tubular pump-house was calculated. Compared with the conventional method of fixed boundary and no weight foundation, the dynamic response would decrease by about 50% in consideration of foundation radiation damping. Thus the influence of foundation radiation damping on the dynamic response of Huaiyin Sanzhan pumping station is relatively obvious. At the same time, the vibration of the pump house was evaluated in accordance with relative control standards, which will provide the basis for the anti-vibration design of project.
On the basis of the pulsating pressure of the measuring locations, the pulsating pressure field of the whole flow passage is structured. The hydraulic vibration time-history analysis of the pump-house of Huaiyin Sanzhan pumping station was made by using 3D finite element numerical simulation, and then the dynamic response of new bulb tubular pump-house was calculated. Compared with the conventional method of fixed boundary and no weight foundation, the dynamic response would decrease by about 50% in consideration of foundation radiation damping. Thus the influence of foundation radiation damping on the dynamic response of Huaiyin Sanzhan pumping station is relatively obvious. At the same time, the vibration of the pump house was evaluated in accordance with relative control standards, which will provide the basis for the anti-vibration design of project.
引文
[1]马震岳,董毓新.水电站机组及厂房振动的研究与治[M].北京:中国水利水电出版社,2004.
[2]马震岳,陈婧,刘志明,等.三峡水电站主厂房振动分析[J].三峡大学学报,2004,26(2):111-115.
[3]欧阳金惠,陈厚群,李德玉.三峡电站厂房结构振动计算与试验研究[J].水利学报,2005,36(4):484-490.
[4]贺向丽,李同春.无限域中的动力人工边界[J].水利水电科技进展,2005,25(3):64-67.
[5]Deeks A J,Randolph M F.Axisymmetric Time-domain Transmitting Boundaries[J].Journal of Engineering Mechanics,1994.120(1):25-42.
[6]贺向丽,李同春.粘-弹性人工边界在重力坝动力分析中的应用[J].水电能源科学,2006,24(1):30-32.
[7]吴健,金峰,张楚汉,王光纶.无限地基辐射阻尼对溪洛渡拱坝地震响应的影响[J].岩土工程学报,2002,24(6):716-719.
[8]泵站设计规范GB-T50265-97.
[9]陈婧,马震岳,刘志明,等.水轮机压力脉动诱发厂房振动分析[J].水力发电,2004,30(5):24-27.
[10]欧阳金惠,陈厚群,张超然,等.156m水位下三峡水电站15#机组厂房结构的振动安全研究[J].水利水电技术,2007,38(9):48-51.
[2]马震岳,陈婧,刘志明,等.三峡水电站主厂房振动分析[J].三峡大学学报,2004,26(2):111-115.
[3]欧阳金惠,陈厚群,李德玉.三峡电站厂房结构振动计算与试验研究[J].水利学报,2005,36(4):484-490.
[4]贺向丽,李同春.无限域中的动力人工边界[J].水利水电科技进展,2005,25(3):64-67.
[5]Deeks A J,Randolph M F.Axisymmetric Time-domain Transmitting Boundaries[J].Journal of Engineering Mechanics,1994.120(1):25-42.
[6]贺向丽,李同春.粘-弹性人工边界在重力坝动力分析中的应用[J].水电能源科学,2006,24(1):30-32.
[7]吴健,金峰,张楚汉,王光纶.无限地基辐射阻尼对溪洛渡拱坝地震响应的影响[J].岩土工程学报,2002,24(6):716-719.
[8]泵站设计规范GB-T50265-97.
[9]陈婧,马震岳,刘志明,等.水轮机压力脉动诱发厂房振动分析[J].水力发电,2004,30(5):24-27.
[10]欧阳金惠,陈厚群,张超然,等.156m水位下三峡水电站15#机组厂房结构的振动安全研究[J].水利水电技术,2007,38(9):48-51.
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