Volume 7, Issue 3
Nonlinear Vertical Vibration of Tension Leg Platforms with Homotopy Analysis Method

Arash Reza & Hamid M. Sedighi

Adv. Appl. Math. Mech., 7 (2015), pp. 357-368.

Published online: 2018-05

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  • Abstract

One of the useful methods for offshore oil exploration in the deep regions is the use of tension leg platforms (TLP). The effective mass fluctuating of the structure which due to its vibration can be noted as one of the important issues about these platforms. With this description, dynamic analysis of these structures will play a significant role in their design. Differential equations of motion of such systems are nonlinear and providing a useful method for its analysis is very important. Also, the amount of added mass coefficient has a direct effect on the level of nonlinearity of partial differential equation of these systems. In this study, Homotopy analysis method has been used for closed form solution of the governing differential equation. Linear springs have been used for modeling the stiffness of this system and the effects of torsion, bending and damping of water have been ignored. In the study of obtained results, the effect of added mass coefficient has been investigated. The results show that increasing of this coefficient decreases the bottom amplitude of fluctuations and the system frequency. The obtained results from this method are in good agreement with the published results on the valid articles.

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@Article{AAMM-7-357, author = {}, title = {Nonlinear Vertical Vibration of Tension Leg Platforms with Homotopy Analysis Method}, journal = {Advances in Applied Mathematics and Mechanics}, year = {2018}, volume = {7}, number = {3}, pages = {357--368}, abstract = {

One of the useful methods for offshore oil exploration in the deep regions is the use of tension leg platforms (TLP). The effective mass fluctuating of the structure which due to its vibration can be noted as one of the important issues about these platforms. With this description, dynamic analysis of these structures will play a significant role in their design. Differential equations of motion of such systems are nonlinear and providing a useful method for its analysis is very important. Also, the amount of added mass coefficient has a direct effect on the level of nonlinearity of partial differential equation of these systems. In this study, Homotopy analysis method has been used for closed form solution of the governing differential equation. Linear springs have been used for modeling the stiffness of this system and the effects of torsion, bending and damping of water have been ignored. In the study of obtained results, the effect of added mass coefficient has been investigated. The results show that increasing of this coefficient decreases the bottom amplitude of fluctuations and the system frequency. The obtained results from this method are in good agreement with the published results on the valid articles.

}, issn = {2075-1354}, doi = {https://doi.org/10.4208/aamm.2013.m314}, url = {http://global-sci.org/intro/article_detail/aamm/12052.html} }
TY - JOUR T1 - Nonlinear Vertical Vibration of Tension Leg Platforms with Homotopy Analysis Method JO - Advances in Applied Mathematics and Mechanics VL - 3 SP - 357 EP - 368 PY - 2018 DA - 2018/05 SN - 7 DO - http://doi.org/10.4208/aamm.2013.m314 UR - https://global-sci.org/intro/article_detail/aamm/12052.html KW - AB -

One of the useful methods for offshore oil exploration in the deep regions is the use of tension leg platforms (TLP). The effective mass fluctuating of the structure which due to its vibration can be noted as one of the important issues about these platforms. With this description, dynamic analysis of these structures will play a significant role in their design. Differential equations of motion of such systems are nonlinear and providing a useful method for its analysis is very important. Also, the amount of added mass coefficient has a direct effect on the level of nonlinearity of partial differential equation of these systems. In this study, Homotopy analysis method has been used for closed form solution of the governing differential equation. Linear springs have been used for modeling the stiffness of this system and the effects of torsion, bending and damping of water have been ignored. In the study of obtained results, the effect of added mass coefficient has been investigated. The results show that increasing of this coefficient decreases the bottom amplitude of fluctuations and the system frequency. The obtained results from this method are in good agreement with the published results on the valid articles.

Arash Reza & Hamid M. Sedighi. (1970). Nonlinear Vertical Vibration of Tension Leg Platforms with Homotopy Analysis Method. Advances in Applied Mathematics and Mechanics. 7 (3). 357-368. doi:10.4208/aamm.2013.m314
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