2006, Volume 8, Issue 4
Strategic Study of CAE >> 2006, Volume 8, Issue 4
The Method to Identify Dynamic Characteristics of Hydro Plant's Supporting Structure Using Machine Halting Process
School of Civil Engineering , Tianjin University , Tianjin 300072 , China
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Abstract
During running process, the effect of dynamic loads is quite complex. So determining dynamic characteristics of supporting structure are of great importance when making hydro plant's dynamic analysis. However, conventional testing measures often cause intensive destruction or are too complicated to implement. In order to solving above problems，this paper，basing on principle of dynamics, applies the test data to analyze the structure vibration and variability of loads during machine halting process，and further puts forward a new method to identify dynamic characteristics of hydro plants supporting structure using machine halting process. The test data comes from prototype observation in Lijiaxia's power house structure of two-row placed units. The method, combining unit test and structure test result, and fully using advantage of wavelet analysis, successfully overcomes poor factor like long variation time of loads，vibration fluctuation，etc.,when analyzing halting problem.
Keywords
supporting structure of power house ; machine halting process ; dynamic characteristics ; wavelet analysis
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References
[ 1 ] 天津大学水利水电工程系.李家峡真机试验报告[R].2004
[ 2 ] 冉启文，课立英.小被分析与分数傅立叶变换及应用[M].北京.国防工业出版社，2002
[ 3 ] 董敏新.水轮发电机组振动[M].大连理工出版社，1989
[ 4 ] 练继建，秦亮.双排机水电站厂房结构动力特性研究[J].水力发电学报，2004，（2） link1
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