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完整後設資料紀錄
DC 欄位 | 值 | 語言 |
---|---|---|
dc.contributor.advisor | 丁肇隆 | |
dc.contributor.author | Chao-Hong Wang | en |
dc.contributor.author | 王超弘 | zh_TW |
dc.date.accessioned | 2021-06-16T16:34:03Z | - |
dc.date.available | 2013-01-16 | |
dc.date.copyright | 2013-01-16 | |
dc.date.issued | 2012 | |
dc.date.submitted | 2012-11-25 | |
dc.identifier.citation | 1.Brossard, J., Chagdali, M., 2001. “Experimental investigation of harmonic generation by wave over a submerged plate.” Coastal Engineering 42, pp. 277-290.
2.Brossard, J., Perret, G., Blonce, L., Diedhiou, A., 2009. “Higher harmonics induced by a submerged horizontal plate and a submerged rectangular step in a wave flume. ” Coastal Engineering 56, pp. 11-22. 3.Cho, Y.S., Lee, J.I., Kim, Y.T., 2004. “Experimental study of strong reflection of regular water waves over submerged breakwaters in tandem.” Ocean Engineering, Volume 31, Issue 10, pp. 1325-1335. 4.Chang, H.K., Liou, J.C., 2007. “ Long wave reflection from submerged trapezoidal breakwaters.” Ocean Engineering, Volume 34, Issue 1, January 2007,pp. 185-191. 5.Christou, M.C., Swan, O.T., Gudmestad, 2008. “The interaction of surface water waves with submerged breakwaters” Coastal Engineering, Volume 55, Issue 12, pp. 945-958. 6.Dick, T.M., Brebner, A., 1968. “Solid and permeable submerged breakwaters.” Proceedings of the 11th International Conference on Coastal Engineering , pp. 1141-1158. 7.Davies, A.G. and Heathershaw, A.D., 1984. “Surface-wave propagation over sinusoidally varying topography.” J.Fliud Mech,Vol. 144,pp. 416-446 8.Driscoll, A.M., Dalrymple, R.A., Grill, S.T., 1992. “Harmonic generation and transmission past a submerged rectangular obstacle. ” Proc. 23rd Int. Coastal Eng. Conf., Venice, ASCE, pp. 1142–1152. 9.Goda, Y., Suzuki, Y., 1976. “Estimation of incident and reflected wave in random wave experiments.” Proceeding of 15th International Conference on Coastal Engineering. ASCE, Honolulu, Hawaii, pp. 828-845. 10.Hirt, C.W., Nichols, B.D., Romero, N.C., 1975. “ SOLA-a numerical solution algorithm for transient fluid flows. ” Los Alamos Scientific Laboratory, LA 5852, pp. 1-50. 11.Huang, C.J., Dong, C.M., 1999. “ Wave deformation and vortex generation in water waves propagating over a surmerged dike. ” Coastal Engineering 37, pp. 123-1480. 12.Johnson, J.W., Fuchs, R.A., Morison, J.R., 1951. “ The damping action of submerged breakwaters. ” Transactions American Geophysical Union 32, pp. 704-718. 13.Kirby, J.T., Anton, J.P., 1990. “Bragg reflection of surface water waves by periodic sansbars. ” Journal of Fluid Mechanics 152, pp. 315-335. 14.Kuo, C.A., Hwung, H.H., Chien, C.H., 2009. “Using time-stack overlooking images to separate incident and reflected waves in wave flume.” Wave Motion 46, pp.189-199. 15.Le Méhauté, B., 1976. “An introduction to hydrodynamics and water waves.” Springer, ISBN 0387072322. 16.Losada, I.J., Patterson, M.D., Losada, M.A., 1997. “Harmonic generation past a submerged porous step.” Coastal Engineering, Volume 31, Issues 1–4, pp. 281-304. 17.Li, F.C., Ting, C.L., 2012. “Separation of free and bound harmonics in waves. ” Coastal Engineering 67, pp. 29-40. 18.Mei, C.C., Ünlüata, U., 1972 .“Harmonic generation in shallow water waves.” 19.Massel, S.R., 1983. “Harmonic generation by waves propagating over a submerged step. ” Coastal Engineering 7, pp. 357-380. 20.Ma, Y.X., Dong, G.H., Ma, X.Z., Wang, G., 2010. “A new method for separation of 2D incident and reflected waves by the Morlet wavelet transform. ” Coastal Engineering 57, pp. 597-603. 21.Nwogu, O., 1993. “An alternative form of Boussinesq equations for modeling the propagation of waves from deep to shallow water.” J. Waterway, Port, Coast. Ocean Eng. ASCE 119 (6), pp.618-638. 22.Ohyama, T., Nadaoka, K.,1992. “Modelling of transformation of nonlinear waves passing over a submerged dike. ” Proceedings of the 23rd Coastal Engineering Conference. ASCE, New York, pp.526-539. 23.Rojanakamthorn, S., Isobe, M., Watanabe, A., 1989. “Design equation for transmission at submerged rubble mound breakwaters” Coastal Engineering in Japan, 32, pp. 209-234. 24.Seelig, W.N., 1980. “ Two-dimensional tests of wave transmission and reflection characteristics of laboratory breakwaters. ” Tech. Rept. No. 80-1, US Army Coast. Engrg. Res. Ctr., Fort Belvoir, VA. 25.Ting, C.L., Lin, M.C., Hsu, C.M., 2005. “Spatial variations of waves propagating over a submerged rectangular obstacle. ” Ocean Engineering 32, pp. 1448-1464. 26.Wei, G., Kirby, J.T., Grilli, S.T., Subramanya, R., 1995. “A Time-dependent numerical code for extended Boussinesq equations.” J. Waterway, Port, Coast. Ocean Eng., ASCE, Vol. 121, No. 5, pp.251-261. 27.Young, C.C., 2009. “Development of a Non-hydrostatic model for simulating free-surface waves.” Department of Civil Engineering,National Taiwan University,Doctoral Dissertation. 28.許展豪,2006。「波浪通過不透水潛堤之流場實驗研究」,國立台灣大學工程科學暨海洋工程學系碩士班論文。 29.丁肇隆,林銘崇,李芳承,許展豪,2006。「波浪通過潛堤之流場特性與諧和波生成之實驗研究」,第二十八屆海洋工程研討會論文集,pp.361-366。 30.許朝敏,林敏崇,2008。「數值模擬波浪通過潛堤之變形」,第二十八屆海洋工程研討會論文集,pp.57-62。 31.陳莉妏,2010。「重力水波下粒子運動軌跡及質量傳輸之研究」,國立台灣大學工程科學暨海洋工程學系碩士論文。 32.王如君,2012。「二波共存之質量與能量傳輸」,國立台灣大學工程科學暨海洋工程學系碩士班論文。 | |
dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/63308 | - |
dc.description.abstract | 本文採用實驗方式與數值方法探討單一週期波通過梯形潛堤所產生之複雜波場。利用流場可視化並搭配接圖技巧,在不考慮碎波條件下,研究波浪通過潛堤時,因非線性效應增強導致波浪產生變形,並產生高階諧和波之現象。將兩者方法分析結果,作一定性與定量上的比較,其中結果包含時序列、空間序列波形、堤前與堤上反射率和全域波浪總能之分析,以確保數值模式模擬之效果良好。此外,本文也利用數值方法模擬波浪通過潛堤之方式,探討高階諧和波生成之現象,討論潛堤堤寬與堤上水深對生成強弱之影響。
從結果發現,數值計算之波速較實驗為快,波高亦較實驗稍大,然而在堤上非線性效應較強的區域,卻觀察到實驗波速大於數值的現象。數值反射率較實驗大,且都有振幅越小反射率越大的情形,不過差異不大。從平均總能結果可發現,兩者皆有入射波振幅越大,諧和波生成越明顯的現象,且數值之諧和波生成現象較實驗強烈,出堤後兩者也發現主頻波與倍頻波之間有能量互相傳遞的現象。 本文同時利用數值方法探討諧和波生成的現象,從結果看出,堤寬對諧和波生成的影響不明顯。相反的,水深呈現而越淺諧和波生成越多的現象,並發現入射條件之Ur數(Ur=(aL^2)/h^3 )與諧和波生成的振幅比例呈現線性的關係。 | zh_TW |
dc.description.abstract | Monochromatic surface waves propagating over a impermeable submerged trapezoidal breakwater under non-breaking conditions were investigated in this research experimentally and numerically. The effect of nonlinearity due to waves shoaling will induce wave deformations as well as the generations of super harmonics. A flow visualization measurement system and image-connection technique were used to record wave profiles, such that surface wave profiles could be analyzed.Numerical calculations were verified by experiment data. Based on the measured results, wave profiles, the reflection coefficients and wave energy were calculated in this research.
From the comparisons of numerical results and experimental data, it shows that the wave celerity and the wave height of numerical results are faster and larger than those from experimental measurements. However, above the breakwaters, the measured wave celerity was faster than the velocity from numerical calculation. It was also observed that the larger the incident wave amplitude, the more apparent super harmonics were generated. After wave transmitting over the breakwaters, waves entered to deep water and wave-wave interaction were observed during propagation. To study the mechanism of harmonic generation, different widths of and water depths above breakwaters were examined numerically. It was found the widths have no apparent effects on the generation of harmonic. However harmonics are generated more easily in shallow water than in deep water. A parameter was proposed to describe the mechanism of harmonic generation successfully. | en |
dc.description.provenance | Made available in DSpace on 2021-06-16T16:34:03Z (GMT). No. of bitstreams: 1 ntu-101-R99525003-1.pdf: 5627633 bytes, checksum: 79a6a383b18ae64bae98262f0b341349 (MD5) Previous issue date: 2012 | en |
dc.description.tableofcontents | 第一章 緒論....................................1
1-1 研究動機.....................................1 1-2 文獻回顧.....................................2 1-2.1 實驗方法.................................2 1-2.2 數值方法.................................5 1-3 研究內容.....................................7 第二章 實驗佈置方法與影像分析方法..............8 2-1 實驗設備.....................................8 2-1.1 實驗水槽.................................8 2-1.2 造波系統.................................8 2-1.3 雷射與光學透鏡組.........................9 2-1.4 高速攝影系統.............................9 2-2 實驗佈置與條件..............................10 2-2.1 實驗佈置................................10 2-2.2 實驗條件................................12 2-3 實驗步驟....................................13 2-4 波形重複性驗證..............................15 2-4.1 造波機與取像時間之穩定性分析............15 2-4.2 波浪週期重複性之驗證....................16 2-5 影像處理....................................17 2-5.1 拍攝解析度..............................17 2-5.2 影像連結................................18 2-5.3 邊緣偵測................................19 2-6 分析方法....................................20 2-6.1 傅立葉轉換(Fourier Transform)...........20 2-6.2 反射率計算..............................26 2-6.3 位能之計算..............................29 第三章 數值與實驗結果驗證與討論...................30 3-1 數值模式之造波驗證..........................30 3-2 波形比較....................................32 3-2.1 時序列波形比較與一維FFT分析.............32 3-2.2 全域波形比較............................36 3-3 反射率計算結果..............................40 3-4 波浪能量計算結果............................46 第四章 諧和波生成現象探討......................50 4-1 條件設計與分析方法.......................50 4-1.1 條件設計.............................50 4-1.2 分析方法.............................55 4-2 堤寬影響.................................57 4-2.1 Case A振幅比例圖.....................57 4-2.2 Case A能量比例圖.....................58 4-3 水深影響.................................60 4-3.1 Case B振幅比例圖.....................60 4-3.2 Case B能量比例圖.....................62 4-3.3 Case B振幅與能量比例圖(引入d/h)......64 4-4 重現距結果...............................67 第五章 結論與建議...........................68 參考文獻....................................71 附錄........................................75 | |
dc.language.iso | zh-TW | |
dc.title | 波浪通過潛堤高階諧和波生成現象探討 | zh_TW |
dc.title | Harmonic Generation of Water Waves Propagating over An Impermeable Submerged Trapezoidal Obstacle | en |
dc.type | Thesis | |
dc.date.schoolyear | 101-1 | |
dc.description.degree | 碩士 | |
dc.contributor.coadvisor | 楊智傑 | |
dc.contributor.oralexamcommittee | 林明崇,許朝敏,江允智 | |
dc.subject.keyword | 流場可視化,潛堤,高階諧和波,反射率,波浪總能,Ur數, | zh_TW |
dc.subject.keyword | Flow Visualization,submerged breakwater,harmonic generation,wave reflection coefficients,wave energy,Ursell number, | en |
dc.relation.page | 87 | |
dc.rights.note | 有償授權 | |
dc.date.accepted | 2012-11-26 | |
dc.contributor.author-college | 工學院 | zh_TW |
dc.contributor.author-dept | 工程科學及海洋工程學研究所 | zh_TW |
顯示於系所單位: | 工程科學及海洋工程學系 |
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