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Статті в журналах з теми "Very Large Floating Structures"

Автор: Grafiati

Опубліковано: 10 березня 2023

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1

Cengiz Ertekin, R., Jang Whan Kim, Koichiro Yoshida, and Alaa E. Mansour. "Very large floating structures (VLFS) Part I." Marine Structures 13, no. 4-5 (July 2000): 215–16. http://dx.doi.org/10.1016/s0951-8339(00)00037-x.

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2

Cengiz Ertekin, R., Jang Whan Kim, Koichiro Yoshida, and Alaa E. Mansour. "Very large floating structures (VLFS) Part II." Marine Structures 14, no. 1-2 (January 2001): 3–4. http://dx.doi.org/10.1016/s0951-8339(01)00004-1.

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3

NAKAHIRA, Tatsuya, Taro KAKINUMA, Ko YAMAMOTO, Kei YAMASHITA, and Takahiro MURAKAMI. "Can Very Large Floating Structures Reduce Tsunami Height?" Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering) 70, no. 2 (2014): I_911—I_915. http://dx.doi.org/10.2208/kaigan.70.i_911.

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4

Newman, J. N. "Efficient hydrodynamic analysis of very large floating structures." Marine Structures 18, no. 2 (March 2005): 169–80. http://dx.doi.org/10.1016/j.marstruc.2005.07.003.

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5

Wang, C. M., and Z. Y. Tay. "Very Large Floating Structures: Applications, Research and Development." Procedia Engineering 14 (2011): 62–72. http://dx.doi.org/10.1016/j.proeng.2011.07.007.

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6

Kagemoto, Hiroshi, and Dick K. P. Yue. "Hydrodynamic interaction analyses of very large floating structures." Marine Structures 6, no. 2-3 (January 1993): 295–322. http://dx.doi.org/10.1016/0951-8339(93)90025-x.

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7

Che, Xiling, Dayun Wang, Minglun Wang, and Yingfan Xu. "Two-Dimensional Hydroelastic Analysis of Very Large Floating Structures." Marine Technology and SNAME News 29, no. 01 (January 1, 1992): 13–24. http://dx.doi.org/10.5957/mt1.1992.29.1.13.

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Анотація:

We have reached a stage at which we are capable of building very large floating structures to meet the steadily increasing needs of ocean resource utilization or to fulfill some special industrial or civil purpose. When such a structure is large enough, its behavior in waves may be substantially different from that of ordinary offshore structures due to low resonant frequencies of the deformable body, and its analysis may require different techniques. In this paper, a two-dimensional hydroelastic theory is applied to a very large floating structure that may be multimodule and extend in the longitudinal direction. A revised strip theory is employed to analyze the hydrodynamic coefficients, but some modifications are introduced to allow for multibody cross sections. The structure is considered to be a flexible beam responding to waves in the vertical direction. Numerical examples are presented with reference to an integrated system of semisubmersibles. A simple model for engineering estimation is also presented.

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8

Hadizadeh Asar, Tannaz, Keyvan Sadeghi, and Arefeh Emami. "Free Vibration Analysis of Very Large Rectangular Floating Structures." International Journal of coastal and offshore engineering 2, no. 1 (June 1, 2018): 59–66. http://dx.doi.org/10.29252/ijcoe.2.1.59.

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9

Ertekin, R. C., H. R. Riggs, X. L. Che, and S. X. Du. "Efficient Methods for Hydroelastic Analysis of Very Large Floating Structures." Journal of Ship Research 37, no. 01 (March 1, 1993): 58–76. http://dx.doi.org/10.5957/jsr.1993.37.1.58.

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The linear hydroelastic response of a very large floating structure (VLFS) consisting of multiple modules is studied theoretically, following a review of the past work on hydroelasticity in fluid-structure interaction. The 3-dimensional Green function method and Morison's equation approach are used to determine the fluid loading in conjunction with two different hydroelastic models. The first method uses a rigid module, flexible connector model in which the hydrodynamic interaction between rigid modules is taken into account. The double composite source distribution method, which is a numerically efficient implementation of the Green function method that exploits double symmetry of the structure in the longitudinal and lateral directions, is used to reduce computations. In the second method, fully elastic modules are considered. In this approach, the fluid loading is obtained by Morison's equation, and the structure is modeled by frame finite elements. The predictions for the rigid-body motions and structural deformations, as well as module-connector loads, obtained by the two different methods are compared. The proposed methods of hydroelasticity have been used to predict the response of a 16-module VLFS, 100 m by 1600 m. Both methods are sufficiently efficient to allow the analysis of even larger VLFS.

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10

Maeda, Hisaaki, Koichi Masuda, Shogo Miyajima, and Tomoki Ikoma. "Hydroelasitic Responses of Pontoon Type Very Large Floating Offshore Structures." Journal of the Society of Naval Architects of Japan 1996, no. 180 (1996): 365–71. http://dx.doi.org/10.2534/jjasnaoe1968.1996.180_365.

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11

Pham, D. C., and C. M. Wang. "Optimal Layout of Gill Cells for Very Large Floating Structures." Journal of Structural Engineering 136, no. 7 (July 2010): 907–16. http://dx.doi.org/10.1061/(asce)st.1943-541x.0000182.

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12

Seto, Hideyuki, Makoto Ohta, Mayumi Ochi, and Shoji Kawakado. "Integrated hydrodynamic–structural analysis of very large floating structures (VLFS)." Marine Structures 18, no. 2 (March 2005): 181–200. http://dx.doi.org/10.1016/j.marstruc.2005.07.008.

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13

König, Marcel, Daniel Ferreira González, Moustafa Abdel-Maksoud, and Alexander Düster. "Hydrodynamic Behaviour of Very Large Floating Structures (VLFS) in Waves." PAMM 14, no. 1 (December 2014): 531–32. http://dx.doi.org/10.1002/pamm.201410253.

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14

Jiang, D., K. H. Tan, C. M. Wang, and J. Dai. "Research and development in connector systems for Very Large Floating Structures." Ocean Engineering 232 (July 2021): 109150. http://dx.doi.org/10.1016/j.oceaneng.2021.109150.

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15

Fujikubo, Masahiko, Tetsuya Yao, and Yutaka Wada. "Structural Modeling for Overall Structural Analysis of Very Large Floating Structures." Journal of the Society of Naval Architects of Japan 1997, no. 182 (1997): 399–406. http://dx.doi.org/10.2534/jjasnaoe1968.1997.182_399.

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16

YAMASHITA, Yasuo, Shunichi KAWACHI, Yoshitaka KINOSHITA, and Koichi OKAMOTO. "Geometric Accuracy Control of Very Large Floating Structures Considering Welding Distortion." QUARTERLY JOURNAL OF THE JAPAN WELDING SOCIETY 25, no. 1 (2007): 106–13. http://dx.doi.org/10.2207/qjjws.25.106.

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17

Qi, Tao, Xiaoping Huang, and Liangbi Li. "Spectral-based fatigue crack propagation prediction for very large floating structures." Marine Structures 57 (January 2018): 193–206. http://dx.doi.org/10.1016/j.marstruc.2017.10.003.

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18

Tabeta, Shigeru, Yoshiyuki Inoue, Shigeru Kimura, and Hiroyuki Makino. "Numerical Calculation of Forces on Very Large Floating Structures by Tsunami." Journal of the Society of Naval Architects of Japan 1998, no. 184 (1998): 303–9. http://dx.doi.org/10.2534/jjasnaoe1968.1998.184_303.

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19

Garrison, C. J. "A Numerically Efficient Method for Analysis of Very Large Articulated Floating Structures." Journal of Ship Research 42, no. 03 (September 1, 1998): 174–86. http://dx.doi.org/10.5957/jsr.1998.42.3.174.

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Анотація:

A method is presented for evaluation of the motion of long structures composed of interconnected barges, or modules, of arbitrary shape. Such structures are being proposed in the construction of offshore airports or other large offshore floating structures. It is known that the evaluation of the motion of jointed or otherwise interconnected modules which make up a long floating structure may be evaluated by three dimensional radiation/diffraction analysis. However, the computing effort increases rapidly as the complexity of the geometric shape of the individual modules and the total number of modules increases. This paper describes an approximate method which drastically reduces the computational effort without major effects on accuracy. The method relies on accounting for hydrodynamic interaction effects between only adjacent modules within the structure rather than between all of the modules since the near-field interaction is by far the more important. This approximation reduces the computational effort to that of solving the two-module problem regardless of the total number of modules in the complete structure.

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20

Wang, Suqin, R. C. Ertekin, and H. R. Riggs. "Computationally efficient techniques in the hydroelasticity analysis of very large floating structures." Computers & Structures 62, no. 4 (February 1997): 603–10. http://dx.doi.org/10.1016/s0045-7949(96)00268-4.

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21

Kim, Jin-Gyun, Seong-Pil Cho, Ki-Tae Kim, and Phill-Seung Lee. "Hydroelastic design contour for the preliminary design of very large floating structures." Ocean Engineering 78 (March 2014): 112–23. http://dx.doi.org/10.1016/j.oceaneng.2013.11.006.

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22

Okada, Shinzo. "Study on Edge Shape of Very Large Floating Structures to Reduce Motion." Journal of the Society of Naval Architects of Japan 1998, no. 184 (1998): 263–69. http://dx.doi.org/10.2534/jjasnaoe1968.1998.184_263.

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23

Takezawa, Seiji, Tsugukiyo Hirayama, Seiya Ueno, and Hiroaki Kajiwara. "Experiments on Responses of Very Large Floating Offshore Structures in Directional Spectrum Waves." Journal of the Society of Naval Architects of Japan 1992, no. 171 (1992): 511–23. http://dx.doi.org/10.2534/jjasnaoe1968.1992.511.

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24

Takezawa, Seiji, Tsugukiyo Hirayama, Seiya Ueno, S. Akin Tuzcuoglu, and Hiroaki Kajiwara. "Experiments on Responses of Very Large Floating Offshore Structures in Directional Spectrum Waves." Journal of the Society of Naval Architects of Japan 1993, no. 173 (1993): 147–59. http://dx.doi.org/10.2534/jjasnaoe1968.1993.147.

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25

Lamas-Pardo, Miguel, Gregorio Iglesias, and Luis Carral. "A review of Very Large Floating Structures (VLFS) for coastal and offshore uses." Ocean Engineering 109 (November 2015): 677–90. http://dx.doi.org/10.1016/j.oceaneng.2015.09.012.

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26

Tay, Z. Y., and C. M. Wang. "Reducing hydroelastic response of very large floating structures by altering their plan shapes." Ocean Systems Engineering 2, no. 1 (March 25, 2012): 69–81. http://dx.doi.org/10.12989/ose.2012.2.1.069.

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27

Moasami, Ali, Bahador Fatehi-Nobarian, and Yousef Hassanzadeh. "Numerical Study on the Effect of Water Waves and Depths on Inclined Braces with Respect to the Stability of VLFS Platforms in the Caspian Sea." Slovak Journal of Civil Engineering 30, no. 1 (March 1, 2022): 42–48. http://dx.doi.org/10.2478/sjce-2022-0005.

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Анотація:

Abstract Very large floating structures (VLFSs) have various applications, such as recreational applications, port facilities, etc. A surge in the population, the advantages of building floating structures compared to traditional methods of land extraction from the sea, and the development of construction technologies, have led to engineers paying attention to very large floating structures. Bracing systems are capable of controlling and reducing the horizontal responses of a floating platform, but they have no major impact on its vertical responses. In the present study, the semi-floating platform was numerically designed to be least affected by the three factors of wave force, horizontal torsion, and horizontal displacement. In order to optimize the design, the semi-floating platform was simulated and subjected to the three wave directions with collision angles of 40, 45 and 55 degrees in the environmental conditions of the Caspian Sea and by exerting the wave effect in a Flow-3D model. Examination of the platform’s movements has demonstrated that the arrangement of an eight-way restraint system with a 40-degree restraint angle responds better to the impact of waves and is more economical compared to other designs.

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28

Tsubogo, Takashi, and Hiroo Okada. "A Basic Investigation on Deflection Wave Propagation and Strength of Very Large Floating Structures." Journal of the Society of Naval Architects of Japan 1997, no. 181 (1997): 299–307. http://dx.doi.org/10.2534/jjasnaoe1968.1997.299.

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29

ETO, Hiroaki, Hitomi KASHIMA, Tomoki IKOMA, and Koichi Masuda. "FUNDAMENTAL STUDY ON MOORING DESIGN OF ELASTIC MOORING SYSTEM FOR VERY LARGE FLOATING STRUCTURES." Journal of Japan Society of Civil Engineers, Ser. B3 (Ocean Engineering) 78, no. 2 (2022): I_271—I_276. http://dx.doi.org/10.2208/jscejoe.78.2_i_271.

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30

Shi, Q. J., D. L. Xu, H. C. Zhang, H. Zhao, and Y. S. Wu. "Optimized stiffness combination of a flexible-base hinged connector for very large floating structures." Marine Structures 60 (July 2018): 151–64. http://dx.doi.org/10.1016/j.marstruc.2018.03.014.

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31

Papaioannou, Iason, Ruiping Gao, Ernst Rank, and Chien Ming Wang. "Stochastic hydroelastic analysis of pontoon-type very large floating structures considering directional wave spectrum." Probabilistic Engineering Mechanics 33 (July 2013): 26–37. http://dx.doi.org/10.1016/j.probengmech.2013.01.006.

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32

Bessho, Masatoshi, Hisaaki Maeda, Koichi Masuda, and Hiroaki Takamura. "Fundamental Study on Numerical Calculation for Sea Shock Response of Very Large Floating Structures." Journal of the Society of Naval Architects of Japan 1999, no. 186 (1999): 215–22. http://dx.doi.org/10.2534/jjasnaoe1968.1999.186_215.

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33

Namba, Yasuhiro, Syunji Kato, and Masakatu Saito. "Estimation method of slowly varying wave drift force acting on very large floating structures." Journal of the Society of Naval Architects of Japan 1999, no. 186 (1999): 235–42. http://dx.doi.org/10.2534/jjasnaoe1968.1999.186_235.

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34

Namba, Yasuhiro, Syunji Kato, Masakatsu Saito, and Tetsuya Hiraishi. "Estimation method of slowly varying wave drift force acting on very large floating structures." Journal of the Society of Naval Architects of Japan 2000, no. 187 (2000): 151–60. http://dx.doi.org/10.2534/jjasnaoe1968.2000.151.

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35

Murai, Motohiko, and Hiroshi Kagemoto. "A Study on the Optimization of the Hydroelastic Responses of Very Large Floating Structures." Journal of the Society of Naval Architects of Japan 2000, no. 187 (2000): 175–84. http://dx.doi.org/10.2534/jjasnaoe1968.2000.175.

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36

Namba, Yasuhiro, Shunji Kato, Hiroshi Sato, Tomoki Ikoma, and Katsuya Maeda. "Estimation method of slowly varying wave drift force acting on very large floating structures." Journal of the Society of Naval Architects of Japan 2000, no. 188 (2000): 287–93. http://dx.doi.org/10.2534/jjasnaoe1968.2000.188_287.

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37

Takezawa, Seiji, Tsugukiyo Hirayama, Seiya Ueno, Akin Tuzcuoglu, and Hiroaki Kajiwara. "Experiments on Responses of Very Large Floating Offshore Structures in Directional Spectrum Waves (second report)." Journal of the Society of Naval Architects of Japan 1992, no. 172 (1992): 57–68. http://dx.doi.org/10.2534/jjasnaoe1968.1992.172_57.

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38

OKAMOTO, Kyoichi, Takeshi ONO, and Osamu SAIJO. "SIMULATION OF TIDAL CURRENTS AND DIFFUSION TAKING INTO DENSITY STRATIFICATION AROUND VERY LARGE FLOATING STRUCTURES." Journal of Structural and Construction Engineering (Transactions of AIJ) 65, no. 528 (2000): 189–95. http://dx.doi.org/10.3130/aijs.65.189_2.

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39

Xu, Jin, Yonggang Sun, Zhifu Li, Xiantao Zhang, and Da Lu. "Analysis of the Hydroelastic Performance of Very Large Floating Structures Based on Multimodules Beam Theory." Mathematical Problems in Engineering 2017 (2017): 1–14. http://dx.doi.org/10.1155/2017/6482527.

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Анотація:

The hydroelastic behavior of very large floating structures (VLFSs) is investigated based on the proposed multimodules beam theory (MBT). To carry out the analysis, the VLFS is first divided into multiple submodules that are connected through their gravity center by a spatial beam with specific stiffness. The external force exerted on the submodules includes the wave hydrodynamic force as well as the beam bending force due to the relative displacements of different submodules. The wave hydrodynamic force is computed based on three-dimensional potential theory. The beam bending force is expressed in the form of a stiffness matrix. The motion response defined at the gravity center of the submodules is solved by the multibody hydrodynamic control equations; then both the displacement and the structure bending moment of the VLFS are determined from the stiffness matrix equations. To account for the moving point mass effects, the proposed method is extended to the time domain based on impulse response function (IRF) theory. The method is verified by comparison with existing results. Detailed results through the displacement and bending moment of the VLFS are provided to show the influence of the number of the submodules and the influence of the moving point mass.

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40

Wei, Wei, Shixiao Fu, Torgeir Moan, Chunhui Song, and Tongxin Ren. "A time-domain method for hydroelasticity of very large floating structures in inhomogeneous sea conditions." Marine Structures 57 (January 2018): 180–92. http://dx.doi.org/10.1016/j.marstruc.2017.10.008.

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41

Liuchao, Qiu, and Liu Hua. "Three-Dimensional Time-Domain Analysis of Very Large Floating Structures Subjected to Unsteady External Loading." Journal of Offshore Mechanics and Arctic Engineering 129, no. 1 (June 3, 2006): 21–28. http://dx.doi.org/10.1115/1.2355511.

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Анотація:

The strong interest in very large floating structure (VLFS) is a result of a need to utilize effectively the ocean space for transportation, industrial use, storage, habitats, and military bases, among others. The VLFS has great width and length and relatively small flexural rigidity, therefore, investigation of its hydroelastic behavior including fluid-structure interaction is of greater importance than studies of its motion as rigid bodies. In addition to the most important wave-induced responses, the operation of the VLFS also requires determination of its dynamic responses with respect to the effect of unsteady external loading due to intense traffic, load movement, takeoffs and landings of airplanes, missile takeoffs, etc. Therefore, the transient responses of a VLFS to impulsive and moving loads must be studied by a reliable calculation method. In this study, a finite element procedure developed directly in time domain for solution of transient dynamic response of the coupled system consists of a VLFS and a fluid domain subjected to arbitrary time-dependent external loads is presented. The hydrodynamic problem is formulated based on linear, inviscid, and slightly compressible fluid theory and the structural response is analyzed under the thin plate assumption. For numerical calculations, a scaled model of the Mega-Float is exemplified. Three tests—weight pull-up test, weight drop test, and weight moving test which idealize the airplane landing and takeoff—are carried out and compared with published experimental data. The overall agreement was favorable which indicates the validation of the present method.

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42

TABETA, Shigeru, Yuichi NAGANO, and Nobuyasu HAGIWARA. "Numerical Experiments of Water Exchange and Investigation of the Influences by Very Large Floating Structures." Journal of the Society of Naval Architects of Japan 1998, no. 183 (1998): 259–65. http://dx.doi.org/10.2534/jjasnaoe1968.1998.259.

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43

Fujikubo, Masahiko, Tetsuya Yao, and Hironori Oida. "Structural Response Analysis of Very Large Floating Structures in Waves Using One-Dimensional Finite Element Model." Journal of the Society of Naval Architects of Japan 1996, no. 179 (1996): 349–58. http://dx.doi.org/10.2534/jjasnaoe1968.1996.349.

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44

YAMASHITA, Yasuo, Shinzoh OKADA, Seiichi SHIMAMUNE, Masayuki YONEZAWA, Norihiko OHNO, and Yoshitaka KINOSHITA. "Joining Technology of Very Large Floating Structures Considering Thermal Distortion and Thermal Stress Caused by Sunshine." QUARTERLY JOURNAL OF THE JAPAN WELDING SOCIETY 25, no. 1 (2007): 114–21. http://dx.doi.org/10.2207/qjjws.25.114.

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45

Talavera, Alejandro L., Koji Masaoka, Takashi Tsubogo, Hiroo Okada, and Yoshisada Murotsu. "A study on reliability-based design systems of very large floating structures under extreme wave loads." Marine Structures 14, no. 1-2 (January 2001): 259–72. http://dx.doi.org/10.1016/s0951-8339(00)00054-x.

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46

Gao, R. P., C. M. Wang, and C. G. Koh. "Reducing hydroelastic response of pontoon-type very large floating structures using flexible connector and gill cells." Engineering Structures 52 (July 2013): 372–83. http://dx.doi.org/10.1016/j.engstruct.2013.03.002.

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47

Liu, Wen Bai, Ke Jia Su, and Shi Lei Xi. "The Selection and Numerical Simulation of Marine Engineering Floating Pier Structure." Advanced Materials Research 243-249 (May 2011): 4705–11. http://dx.doi.org/10.4028/www.scientific.net/amr.243-249.4705.

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As a type of very large floating structures，the design concept of the grid structure is applied to the marine engineering floating pier structure. The grid structure has many merits such as high structural strength, stiffness, integrity, lower weight and high degree of industrialization. A finite element software named ABAQUS is used to analyze the stress and strain of the marine engineering floating pier structure in the marine environment. The analysis shows that the structure meets the engineering requirements in structural strength, stiffness, stability and wave resistance.

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48

Pimenta, Francisco, Carlo Ruzzo, Giuseppe Failla, Felice Arena, Marco Alves, and Filipe Magalhães. "Dynamic Response Characterization of Floating Structures Based on Numerical Simulations." Energies 13, no. 21 (October 29, 2020): 5670. http://dx.doi.org/10.3390/en13215670.

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Output-only methods are widely used to characterize the dynamic behavior of very diverse structures. However, their application to floating structures may be limited due to their strong nonlinear behavior. Therefore, since there is very little experience on the application of these experimental tools to these very peculiar structures, it is very important to develop studies, either based on numerical simulations or on real experimental data, to better understand their potential and limitations. In an initial phase, the use of numerical simulations permits a better control of all the involved variables. In this work, the Covariance-driven Stochastic Subspace Identification (SSI-COV) algorithm is applied to numerically simulated data of two different solutions to Floating Offshore Wind Turbines (FOWT) and for its capability of tracking the rigid body motion modal properties and susceptibility to different modeling restrictions and environmental conditions tested. The feasibility of applying the methods in an automated fashion in the processing of a large number of datasets is also evaluated. While the structure natural frequencies were consistently obtained from all the simulations, some difficulties were observed in the estimation of the mode shape components in the most changeling scenarios. The estimated modal damping coefficients were in good agreement with the expected results. From all the results, it can be concluded that output-only methods are capable of characterizing the dynamic behavior of a floating structure, even in the context of continuous dynamic monitoring using automated tracking of the modal properties, and should now be tested under uncontrolled environmental loads.

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Pham, D. C., C. M. Wang, and E. P. Bangun. "Experimental study on anti-heaving devices for very large floating structure." IES Journal Part A: Civil & Structural Engineering 2, no. 4 (October 14, 2009): 255–71. http://dx.doi.org/10.1080/19373260903017415.

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50

Karperaki, Angeliki E., and Kostas A. Belibassakis. "Hydroelastic analysis of Very Large Floating Structures in variable bathymetry regions by multi-modal expansions and FEM." Journal of Fluids and Structures 102 (April 2021): 103236. http://dx.doi.org/10.1016/j.jfluidstructs.2021.103236.

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