海洋構造物の溶接変形の予測と制御に関する基礎的研究　第１報　海洋構造物の溶接部の局部溶接変形量とその影響因子

• 中長 啓治

  大阪大学

• 盛岡 純一

  川崎製鐵(株)

• 上田 幸雄

  大阪大学

書誌事項

タイトル別名

• Prediction and Control of Welding Deformation of Offshore Structure (Report 1). Local Shrinkage and Rotations near the Joint by Welding in Offshore Structure and Their Influential Factors.
• Prediction and Control of Welding Deformation of Offshore Structure (Report 1)
• 海洋構造物の溶接変形の予測と制御に関する基礎的研究(第1報)

抄録

Most of offshore structures for oil exploitation are composed of a deck and legs which are framed by welding many pipes. The prediction and control of the welding deformation is very important for the efficient and economical building of offshore structures. This is a basic study of the prediction and control, of which object is the offshore structure of jacket type.<BR>Almost all studies on the welding deformations of pipes (cylindrical drums, cylindrical shells) have been performed in relation to the local deformation by the circumferential butt welding. In this study, the welding deformation when a pipe (brace) is welded on the wall of another pipe (chord), like the welding of T-joint or Y-joint, was investigated in the actual building process of a jacket. The local deformations of the braces by welding were measured near the joints. At the same time, the influential factors, such as brace sizes, groove shapes, welding sequences, heat inputs, etc., on the local deformations were investigated.<BR>The correlations between the deformations and the factors were examined. As a result, it was made clear that the total heat input (the summation of heat inputs per unit length, of all welding passes) for each joint had influence on the local deformations most. The relations between the local deformations, namely, axial shrinkage, in-plane rotation, out-of-plane rotation, of the brace and the total heat input were formulated by the regression analysis. Also, the mechanisms of the increase and decrease of the deformations were discussed in detail, related to the total heat input, the welding sequence, etc. In the next report, the welding deformation of the whole structure will be simulated by the theoretical analysis, using the above relations for the local deformations.

収録刊行物

• 溶接学会論文集

  溶接学会論文集 15 (1), 135-140, 1997

  一般社団法人 溶接学会

キーワード

• Welding deformation
• Shrinkage and rotation
• Joint
• Prediction
• Control
• Offshore structure
• Jacket type

詳細情報

• CRID: 1390282679699490304
• NII論文ID: 130003764556
• DOI: 10.2207/qjjws.15.135
• ISSN: 24348252
• ISSN: 02884771
• 本文言語コード: ja
• データソース種別:
  • JaLC
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可