臺灣博碩士論文加值系統

台灣位在地震活躍區，東臨環太平洋火山板塊，西臨菲律賓海底板塊。板塊頻繁地向西北碰撞歐亞板塊，因此地震頻繁。板塊碰撞前緣的斷層作用震源深度較淺，地震震度大且容易造成嚴重災情。2011年3月11日本福島發生規模9.0級大地震，雙葉郡的福島第一核電廠遭受侵襲。機組與電力網的連接受到嚴重損毀，只能倚賴柴油發電機驅動電子系統與冷卻系統。因地震產生的大海嘯淹沒緊急發電機室，損毀了緊急柴油發電機。核子反應爐因冷卻系統停止運作而過熱導致爐內氫氣爆炸。輻射外洩造成大範圍核災，更凸顯出核能發電廠地震防治之重要性。國內核能發電廠防震設備多數不足以應付強烈地震發生，因此核能發電廠的防震系統可說是擔任相當重要的角色。
本論文主要是研究探討阻尼隔震器於地震振動下之動態分析，利用電腦輔助設計軟體Solid Works來繪製出阻尼隔震器之3D立體模型，將建立完成之3D立體模型匯入有限元素分析軟體，並匯入阻尼隔震器之材料系數(楊氏係數、浦松比、密度、黏滯係數)至ANSYS Workbench中，進行有限元素分析求出自然振動頻率及其模態特性。並且模擬地震時所產生的振動觀察隔震器的減振效果。
關鍵字: 隔震器、阻尼、動態特性

Taiwan is situated in between two highly active tectonic plates, the Circum-Pacific Seismic Belt at the east and the Philippine Sea Plate at the west. The Philippine Sea Plate frequently collides with the Eurasian plate, causing intensive seismic activities. Seismic activities in this area are characterized by shallow hypocenter and high intensity and therefore large-scale devastations have been recorded throughout history. On March 11th 2011, a magnitude 9.0 earthquake hit Japan’s Fukushima region, and the nearby Fukushima Daiichi Nuclear Power Plant (Futaba District) was severely damaged. Irreversible damage on the power network, which was the main power source to the six boiling water reactors (BWR), left the power company no choice but to switch on the emergency diesel power generator in order to maintain the functions of the electronic and cooling systems. To make things worse, the earthquake triggered deadly tsunami. Gushing saltwater flooded the emergency power generator room and destroyed the emergency diesel power generator. The cooling systems were permanently shut down and, as a consequence, the nuclear reactors became overheated. Hydrogen exploded inside the reactors, causing release of radioactivity in massive scale. This incident brought the world to reexamine the safety of their nuclear plants, especially on the aspect of sustainability associated with earthquake. In the wake of the Fukushima earthquake, issues of nuclear safety resurfaced and gained wide attention in Taiwan. We found that the majority of the nuclear power plants in Taiwan have not been designed to sustain violent earthquake and therefore shock isolation systems for nuclear power plants emerged as a significant subject of research.

This dissertation presents a dynamic analysis on damping isolator under simulated earthquake vibration. Analysis was conducted using computer-aided design software Solid Works to produce a 3D model of the damping isolator, which was then imported into ANSYS Workbench, along with the material coefficients of the damping isolator (Young’s modulus, Poisson’s ratio and density), for finite element analysis. From the finite element analysis, we derived the natural vibration frequency and modal characteristics and made an observation on the effect of the damping isolator under a simulated earthquake. Statistics derived from the analyses were entered into a comparison to determine whether the designed damping isolator can effectively prevent damage to the power generator during earthquake.
Keywords: isolator, damping, dynamic characteristics

第1章 緒論...................................................................1
1.1研究動機..................................................................1
1.2研究目的..................................................................1
1.3隔震器簡介................................................................2
1.4文獻回顧..................................................................8
1.5論文大綱..................................................................12
第2章 有限元素分析............................................................16
2.1有限元素分析簡介...........................................................16
2.1.1ANSYS分析軟體介紹.......................................................16
2.2ANSYS有限元素分析流程......................................................17
第3章 阻尼隔震器動態分析.......................................................21
3.1阻尼隔震器衝擊動態分析架構...................................................21
3.2阻尼隔震器地震振動動態分析架構................................................22
第4章 結果與討論..............................................................26
4.1阻尼隔震器有限元素收斂性分析.................................................26
4.2有限元素阻尼隔震器模態分析...................................................28
4.3固體與液體阻尼液隔震器衝擊動態分析.............................................32
4.4液面高度影響之隔震器衝擊動態分析..............................................36
4.4.1阻尼隔震器受衝擊後時域比較.................................................39
4.5阻尼隔震器地震振動動態分析...................................................43
4.5.1垂直地震振動後時域反應....................................................44
4.5.2水平地震振動後時域反應....................................................47
4.6載重影響之隔震器振動動態分析.................................................49
4.7彈簧材料與K值影響之隔震器振動動態分析..........................................54
第5章 結論與建議..............................................................59
5.1結論.....................................................................59
5.2建議.....................................................................60
參考文獻.....................................................................61

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