Systematic method for positioning clamps and strongbacks based on their influence on welding displacements

Donghan Woo, Mitsuru Kitamura*, Akihiro Takezawa

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)


To control welding displacements, mitigation methods such as clamps and strongbacks are widely used in heavy industries. It can be easily concluded that providing for as many clamps and strongbacks as feasible on welded structures to minimize welding displacements is common knowledge, but this may not always be feasible due to restrictive work environments as well as cost factors and interference from other portions of the structure. Currently there is not a distinct system to efficiently position clamps and strongbacks at welded structures. Based on understanding of how clamps and strongbacks effect on the reduction of welding displacements, a systematic method to efficiently position them will enable improvements to the welding process. In the present study, several cases which have differently positioned clamps and strongbacks at welded structures were numerically simulated by the elastic Finite Element Method (FEM) using inherent strain theory to investigate the influence of clamps and strongbacks on the reduction of welding distortions. According to the simulation data, the applicable systematic method for efficiently positioning clamps and strongbacks for minimizing welding deformations is proposed herein.

Original languageEnglish
Article number107084
JournalOcean Engineering
Publication statusPublished - 2020 Apr 15
Externally publishedYes


  • FEM
  • Ship grillage structure
  • Welding displacement

ASJC Scopus subject areas

  • Environmental Engineering
  • Ocean Engineering


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