An integrated reliability-based design optimization of offshore towers

Karadeniz H., TOĞAN V., Vrouwenvelder T.

RELIABILITY ENGINEERING & SYSTEM SAFETY, cilt.94, sa.10, ss.1510-1516, 2009 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 94 Sayı: 10
  • Basım Tarihi: 2009
  • Doi Numarası: 10.1016/j.ress.2009.02.008
  • Dergi Adı: RELIABILITY ENGINEERING & SYSTEM SAFETY
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.1510-1516
  • Anahtar Kelimeler: Reliability-based optimization, Reliability analysis, Offshore towers, Uncertainty, STRUCTURAL OPTIMIZATION, GENETIC ALGORITHMS, STEEL STRUCTURES, CONSTRAINTS, SYSTEMS
  • Karadeniz Teknik Üniversitesi Adresli: Hayır

Özet

After recognizing the uncertainty in the parameters such as material, loading, geometry and so on in contrast with the conventional optimization, the reliability-based design optimization (RBDO) concept has become more meaningful to perform an economical design implementation, which includes a reliability analysis and an optimization algorithm. RBDO procedures include structural analysis, reliability analysis and sensitivity analysis both for optimization and for reliability. The efficiency of the RBDO system depends on the mentioned numerical algorithms. In this work, an integrated algorithms system is proposed to implement the RBDO of the offshore towers, which are subjected to the extreme wave loading. The numerical strategies interacting with each other to fulfill the RBDO of towers are as follows: (a) a structural analysis program, SAPOS, (b) an optimization program, SQP and (c) a reliability analysis program based on FORM. A demonstration of an example tripod tower under the reliability constraints based on limit states of the critical stress, buckling and the natural frequency is presented. (c) 2009 Elsevier Ltd. All rights reserved.