Vibration Analysis of Welded Tubular Structures Considering Local Joint Flexibility

Yamin Wang; Yongbo Shao; Shanshan Tu; Dongping Yang; Gengqi Niu; Fengle Long

doi:doi:10.11648/j.ajma.20170505.11

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Vibration Analysis of Welded Tubular Structures Considering Local Joint Flexibility

Yamin Wang, Yongbo Shao, Shanshan Tu, Dongping Yang, Gengqi Niu, Fengle Long

Published in American Journal of Mechanics and Applications (Volume 5, Issue 5)

Received: 5 December 2017 Published: 6 December 2017

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Abstract

Welded tubular structure is the backbone of offshore jacket platform. As a thin-walled structure, local joint flexibility (LJF) in a tubular structure is prominent, and it may produce significant effect on the dynamic performance for the overall structure. This study presents a simplified model to analyze the dynamic behavior of a steel tubular structure with LJF. The presented model simplifies a tubular structure into a frame model consisted of beam elements with considering the LJFs at the connections between any two elements. The LJF is simulated with a fictitious beam element (FBE). Methods for defining the dimensions of the cross section and the material properties of the FBE are provided. The accuracy of the presented method is verified through comparing with three dimensional (3D) finite element results on the vibration of a tubular structure. The tested results indicate that LJF has remarkable effect on the vibration of welded tubular structures, and the simplified model presented in this study can provide more accurate estimation compared to conventional rigid frame model.

Published in	American Journal of Mechanics and Applications (Volume 5, Issue 5)
DOI	10.11648/j.ajma.20170505.11
Page(s)	41-46
Creative Commons	This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited.
Copyright	Copyright © The Author(s), 2017. Published by Science Publishing Group

Keywords

Welded Tubular Structure, Local joint Flexibility (LJF), Simplified Model, Fictitious Beam Element (FBE), Vibration

References

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[3]	B. Z. Chen, Y. R. Hu, M. J. Tan, “Local joint flexibility of tubular joints of offshore, structures”, Marine Structures, 1990, vol. 3, pp. 177-197.
[4]	L. X. Yang, T. Y. Chen, S. Y. Wu, “Local flexibility behavior of tubular joints and its effect on global analysis of tubular structures”, China Ocean Engineering, 1990, vol. 4, pp. 371-384.
[5]	Y. R. Hu, B. Z. Chen, M. J. Tan, “An equivalent element representing local flexibility of tubular joints in structural analysis of offshore platforms”, Computers and Structures, 1993, vol. 47, pp. 957-969.
[6]	T. Chen, H. Zhang, “Stress analysis of spatial frames with consideration of local flexibility of multiplanar tubular joint”, Engineering Structures, 1996, vol. 18, pp. 465-471.
[7]	W. Wang, Y. Y. Chen, “Modeling and classification of tubular joint rigidity and its effect on the global response of CHS lattice girders”, Structural Engineering and Mechanics, vol. 21, pp. 677-698.
[8]	M. Mirtaheri, H. Ali Zakeri, P. Alanjari, M. Amin Assareh, “Effect of joint flexibility on overall behavior of jacket type offshore platforms”, American Journal of Engineering and Applied Sciences, 2009, vol. 2, pp. 25-30.
[9]	P. Alanjari, B. Asgarian, M. Kia, “Nonlinear joint flexibility element for the modelling of jacket-type offshore platforms”, Applied Ocean Research, 2011, vol. 33, pp. 147-157.
[10]	J. G. Bouwkamp, “An improved joint model and equations for flexibility of tubular joints”, Journal of Petroleum Technology, 1996, vol. 18, pp. 1491-1499.
[11]	Y. Ueda, S. M. H. Rashed, K. Nakacho, “An improved joint model and equations for flexibility of tubular joints”, Journal of Offshore Mechanics and Arctic Engineering, 1990, vol. 112, pp. 157-168.
[12]	G. Z. Qiu, J. C. Zhao, “Analysis and calculation of axial stiffness of tubular X-joints under compression on braces”, Journal of Shanghai Jiaotong University (Science Edition), 2009, vol. 14, pp. 410-417.
[13]	G. Z. Qiu, J. H. Gong, J. C. Zhao, “Parametric formulae for axial stiffness of CHS X-joints subjected to brace axial tension”, Journal of Zhejiang University - Science A (Applied Physics & Engineering), 2011, vol. 12, pp. 121-130.
[14]	F. Gao, B. Hu, H. P. Zhu, “Parametric equations to predict LJF of completely overlapped tubular joints under lap brace axial loading”, Journal of Constructional Steel Research, 2013, vol. 89, pp. 284-292.
[15]	F. Gao, B. Hu, H. P. Zhu, “Local joint flexibility of completely overlapped tubular joints under in-plane bending”, Journal of Constructional Steel Research, 2014, vol. 99, pp. 1-9.
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[17]	B. Asgarian, V. Mokarram, P. Alanjari, “Local joint flexibility equations for Y-, T and K-type tubular joints”, Ocean System Engineering, 2014, vol. 4, pp. 151-167.
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APA Style

Yamin Wang, Yongbo Shao, Shanshan Tu, Dongping Yang, Gengqi Niu, et al. (2017). Vibration Analysis of Welded Tubular Structures Considering Local Joint Flexibility. American Journal of Mechanics and Applications, 5(5), 41-46. https://doi.org/10.11648/j.ajma.20170505.11

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ACS Style

Yamin Wang; Yongbo Shao; Shanshan Tu; Dongping Yang; Gengqi Niu, et al. Vibration Analysis of Welded Tubular Structures Considering Local Joint Flexibility. Am. J. Mech. Appl. 2017, 5(5), 41-46. doi: 10.11648/j.ajma.20170505.11

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AMA Style

Yamin Wang, Yongbo Shao, Shanshan Tu, Dongping Yang, Gengqi Niu, et al. Vibration Analysis of Welded Tubular Structures Considering Local Joint Flexibility. Am J Mech Appl. 2017;5(5):41-46. doi: 10.11648/j.ajma.20170505.11

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@article{10.11648/j.ajma.20170505.11,
  author = {Yamin Wang and Yongbo Shao and Shanshan Tu and Dongping Yang and Gengqi Niu and Fengle Long},
  title = {Vibration Analysis of Welded Tubular Structures Considering Local Joint Flexibility},
  journal = {American Journal of Mechanics and Applications},
  volume = {5},
  number = {5},
  pages = {41-46},
  doi = {10.11648/j.ajma.20170505.11},
  url = {https://doi.org/10.11648/j.ajma.20170505.11},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ajma.20170505.11},
  abstract = {Welded tubular structure is the backbone of offshore jacket platform. As a thin-walled structure, local joint flexibility (LJF) in a tubular structure is prominent, and it may produce significant effect on the dynamic performance for the overall structure. This study presents a simplified model to analyze the dynamic behavior of a steel tubular structure with LJF. The presented model simplifies a tubular structure into a frame model consisted of beam elements with considering the LJFs at the connections between any two elements. The LJF is simulated with a fictitious beam element (FBE). Methods for defining the dimensions of the cross section and the material properties of the FBE are provided. The accuracy of the presented method is verified through comparing with three dimensional (3D) finite element results on the vibration of a tubular structure. The tested results indicate that LJF has remarkable effect on the vibration of welded tubular structures, and the simplified model presented in this study can provide more accurate estimation compared to conventional rigid frame model.},
 year = {2017}
}

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TY  - JOUR
T1  - Vibration Analysis of Welded Tubular Structures Considering Local Joint Flexibility
AU  - Yamin Wang
AU  - Yongbo Shao
AU  - Shanshan Tu
AU  - Dongping Yang
AU  - Gengqi Niu
AU  - Fengle Long
Y1  - 2017/12/06
PY  - 2017
N1  - https://doi.org/10.11648/j.ajma.20170505.11
DO  - 10.11648/j.ajma.20170505.11
T2  - American Journal of Mechanics and Applications
JF  - American Journal of Mechanics and Applications
JO  - American Journal of Mechanics and Applications
SP  - 41
EP  - 46
PB  - Science Publishing Group
SN  - 2376-6131
UR  - https://doi.org/10.11648/j.ajma.20170505.11
AB  - Welded tubular structure is the backbone of offshore jacket platform. As a thin-walled structure, local joint flexibility (LJF) in a tubular structure is prominent, and it may produce significant effect on the dynamic performance for the overall structure. This study presents a simplified model to analyze the dynamic behavior of a steel tubular structure with LJF. The presented model simplifies a tubular structure into a frame model consisted of beam elements with considering the LJFs at the connections between any two elements. The LJF is simulated with a fictitious beam element (FBE). Methods for defining the dimensions of the cross section and the material properties of the FBE are provided. The accuracy of the presented method is verified through comparing with three dimensional (3D) finite element results on the vibration of a tubular structure. The tested results indicate that LJF has remarkable effect on the vibration of welded tubular structures, and the simplified model presented in this study can provide more accurate estimation compared to conventional rigid frame model.
VL  - 5
IS  - 5
ER  -

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Author Information

Yamin Wang

School of Mechatronic Engineering, Southwest Petroleum University, Chengdu, China
Yongbo Shao

School of Mechatronic Engineering, Southwest Petroleum University, Chengdu, China
Shanshan Tu

School of Civil Engineering, Yantai University, Yantai, China
Dongping Yang

Technology Inspection Centerr, China Petroleum & Chemical Corporation, Dongying, China
Gengqi Niu

Technology Inspection Centerr, China Petroleum & Chemical Corporation, Dongying, China
Fengle Long

Technology Inspection Centerr, China Petroleum & Chemical Corporation, Dongying, China

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Plain Text BibTeX RIS

APA Style

Yamin Wang, Yongbo Shao, Shanshan Tu, Dongping Yang, Gengqi Niu, et al. (2017). Vibration Analysis of Welded Tubular Structures Considering Local Joint Flexibility. American Journal of Mechanics and Applications, 5(5), 41-46. https://doi.org/10.11648/j.ajma.20170505.11

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ACS Style

Yamin Wang; Yongbo Shao; Shanshan Tu; Dongping Yang; Gengqi Niu, et al. Vibration Analysis of Welded Tubular Structures Considering Local Joint Flexibility. Am. J. Mech. Appl. 2017, 5(5), 41-46. doi: 10.11648/j.ajma.20170505.11

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AMA Style

Yamin Wang, Yongbo Shao, Shanshan Tu, Dongping Yang, Gengqi Niu, et al. Vibration Analysis of Welded Tubular Structures Considering Local Joint Flexibility. Am J Mech Appl. 2017;5(5):41-46. doi: 10.11648/j.ajma.20170505.11

Copy | Download

@article{10.11648/j.ajma.20170505.11,
  author = {Yamin Wang and Yongbo Shao and Shanshan Tu and Dongping Yang and Gengqi Niu and Fengle Long},
  title = {Vibration Analysis of Welded Tubular Structures Considering Local Joint Flexibility},
  journal = {American Journal of Mechanics and Applications},
  volume = {5},
  number = {5},
  pages = {41-46},
  doi = {10.11648/j.ajma.20170505.11},
  url = {https://doi.org/10.11648/j.ajma.20170505.11},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ajma.20170505.11},
  abstract = {Welded tubular structure is the backbone of offshore jacket platform. As a thin-walled structure, local joint flexibility (LJF) in a tubular structure is prominent, and it may produce significant effect on the dynamic performance for the overall structure. This study presents a simplified model to analyze the dynamic behavior of a steel tubular structure with LJF. The presented model simplifies a tubular structure into a frame model consisted of beam elements with considering the LJFs at the connections between any two elements. The LJF is simulated with a fictitious beam element (FBE). Methods for defining the dimensions of the cross section and the material properties of the FBE are provided. The accuracy of the presented method is verified through comparing with three dimensional (3D) finite element results on the vibration of a tubular structure. The tested results indicate that LJF has remarkable effect on the vibration of welded tubular structures, and the simplified model presented in this study can provide more accurate estimation compared to conventional rigid frame model.},
 year = {2017}
}

Copy | Download

TY  - JOUR
T1  - Vibration Analysis of Welded Tubular Structures Considering Local Joint Flexibility
AU  - Yamin Wang
AU  - Yongbo Shao
AU  - Shanshan Tu
AU  - Dongping Yang
AU  - Gengqi Niu
AU  - Fengle Long
Y1  - 2017/12/06
PY  - 2017
N1  - https://doi.org/10.11648/j.ajma.20170505.11
DO  - 10.11648/j.ajma.20170505.11
T2  - American Journal of Mechanics and Applications
JF  - American Journal of Mechanics and Applications
JO  - American Journal of Mechanics and Applications
SP  - 41
EP  - 46
PB  - Science Publishing Group
SN  - 2376-6131
UR  - https://doi.org/10.11648/j.ajma.20170505.11
AB  - Welded tubular structure is the backbone of offshore jacket platform. As a thin-walled structure, local joint flexibility (LJF) in a tubular structure is prominent, and it may produce significant effect on the dynamic performance for the overall structure. This study presents a simplified model to analyze the dynamic behavior of a steel tubular structure with LJF. The presented model simplifies a tubular structure into a frame model consisted of beam elements with considering the LJFs at the connections between any two elements. The LJF is simulated with a fictitious beam element (FBE). Methods for defining the dimensions of the cross section and the material properties of the FBE are provided. The accuracy of the presented method is verified through comparing with three dimensional (3D) finite element results on the vibration of a tubular structure. The tested results indicate that LJF has remarkable effect on the vibration of welded tubular structures, and the simplified model presented in this study can provide more accurate estimation compared to conventional rigid frame model.
VL  - 5
IS  - 5
ER  -

Copy | Download