| Analysis of the hull girder vibration by dynamic stiffness matrix method |
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| 作者姓名： | ZHOU Ping ZHAO De-you |
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| 作者单位： | ZHOU Ping and ZHAO De-you Department of Naval Architecture，Dalian University of Technology，Dalian 116023，China |
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| 摘 要： | 1 Introduction1 The excitations of the main engine and propellers may induce harmful vibration of the ship. To avoid resonance, the overall natural frequencies and responses of the ship hull must be calculated firstly, and the results can be taken as the …
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| 关 键 词： | 船梁 振动性 动态刚度矩阵 计算模型 |
| 文章编号： | 1671-9433（2006）03-0030-06 |
| 收稿时间： | 2006-06-22 |
Analysis of the hull girder vibration by dynamic stiffness matrix method |
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| ZHOU Ping ZHAO De-you.Analysis of the hull girder vibration by dynamic stiffness matrix method[J].Journal of Marine Science and Application,2006,5(3):30-35. |
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| Authors: | Ping Zhou De-you Zhao |
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| Institution: | (1) Department of Naval Architecture, Dalian University of Technology, Dalian, 116023, China |
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| Abstract: | Dynamic stiffness matrix method is applied to compute vibration of hull girder in this paper. This method can not only simplify the computational model, but also get much higher frequencies and responses accurately. The analytical expressions of dynamic stiffness matrix of a Timoshenko beam for transverse vibration are presented in this paper. All effects of rotatory inertia and shear deformation are taken into account in the formulation. The resulting dynamic stiffness matrix combined with the Wittrick-Williams algorithm is used to compute natural frequencies and mode shapes of the 299,500 DWT VLCC, and then the vibrational responses are solved by the mode superposition method. The computational results are compared with those obtained from other approximate methods and experiment, and it indicates that the method is accurate and efficient. |
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| Keywords: | hull girder vibration characteristics dynamic stiffness matrix |
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