| Energy Anaiysis for TMD-Structure Systems Subjected to Impact Loading |
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| 作者姓名： | 王树青 李华军 嵇春艳 焦桂英 |
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| 作者单位： | College of Engineering，Ocean University of Qingdao，Qingdao 266071，China，College of Engineering，Ocean University of Qingdao，Qingdao 266071，China，College of Engineering，Ocean University of Qingdao，Qingdao 266071，China，College of Engineering，Ocean University of Qingdao，Qingdao 266071，China |
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| 摘 要： | This paper investigates the characteristics of reduction of the lateral vibration by use of a Tuned Mass Damper (TMD) for offshore jacket platforms under impact loading. Unlike traditional analysis, the present analysis focuses on the energy concept of TMD/structure systems. In this study, a time domain is taken. The platform is modeled as a simplified single-degree-of-freedom (SDOF) system by extraction of the first vibration mode of the structure and the excited force is assumed to be impact loading. The energy dissipation and energy transmission of the structure-TMD system are studied. Finally, an optimized TMD design for the modeled platform is demonstrated based on a new type of cost function - maxi-mum dissipated energy by TMD. Results indicate that TMD control is effective in reducing the Standard deviation of the deck motion but less effective in reducing the maximum response under impact loading.
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Energy Anaiysis for TMD-Structure Systems Subjected to Impact Loading |
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| WANG Shuqing LI Huajun
JI Chunyan and JIAO Guiying
College of Engineering,Ocean University of Cingdaa,Cingdaa ,China.Energy Anaiysis for TMD-Structure Systems Subjected to Impact Loading[J].China Ocean Engineering,2002(3). |
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| Authors: | WANG Shuqing LI Huajun
JI Chunyan and JIAO Guiying
College of Engineering Ocean University of Cingdaa Cingdaa China |
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| Institution: | WANG Shuqing LI Huajun
JI Chunyan and JIAO Guiying
College of Engineering,Ocean University of Cingdaa,Cingdaa 266071,China |
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| Abstract: | This paper investigates the characteristics of reduction of the lateral vibration by use of a Tuned Mass Damper (TMD) for offshore jacket platforms under impact loading. Unlike traditional analysis, the present analysis focuses on the energy concept of TMD/structure systems. In this study, a time domain is taken. The platform is modeled as a simplified single-degree-of-freedom (SDOF) system by extraction of the first vibration mode of the structure and the excited force is assumed to be impact loading. The energy dissipation and energy transmission of the structure-TMD system are studied. Finally, an optimized TMD design for the modeled platform is demonstrated based on a new type of cost function - maxi-mum dissipated energy by TMD. Results indicate that TMD control is effective in reducing the Standard deviation of the deck motion but less effective in reducing the maximum response under impact loading. |
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| Keywords: | tuned mass damper impact loading energy analysis offshore platforms vibration reduction |
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