【摘要】 完成了恰西玛核电站(CHASNUPP)蒸汽发生器下部模拟体的地震响应分析和试验。下部模拟体由管板、441根U形棒(模拟U形管)、9根拉杆、管束套筒、下筒体以及下筒体和管束套筒间的一些定位螺栓所组成。分析和试验数据表明蒸汽发生器下部模拟体的刚性比纯管束模拟体大,下部模拟体在地震条件下以系统运动的形式出现。另外,下部模拟体的固有基频高于管束而低于下筒体的对应值,整体频率分量占绝对优势而局部频率分量不明显。试验数据和有限元的分析结果符合得很好,验证了数学模型的有效性。更多还原

【Abstract】 The seismic response analysis and test of CHASNUPP steam generator lower part model has been performed. The lower part model consists of a tube sheet, 441 U-shaped rods (modeled on U-shaped tubes), 9 tie rods,a tube bundle wrapper, a lower shell and some position bolts between the lower shell and the wrapper. The analytical and experimental data show that the steam generator lower part model is more stiffer than pure tube bundle model. The movement of the lower part model appears in a systematic mode in earthquake condition. The fundamental natural frequency of this model is higher than that of the tube bundle model and lower than that of the lower shell. The global frequency components are absolutely dominant and the local frequency components are insignificant. The experimental data are in good agreement with the results from finite element method. The effectiveness of mathematical model is verified.更多还原