Reliability-based design optimization for elastoplastic mechanical structures

Kaymaz I., MARTI K.

COMPUTERS & STRUCTURES, cilt.85, sa.10, ss.615-625, 2007 (SCI-Expanded, Scopus) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 85 Sayı: 10
  • Basım Tarihi: 2007
  • Doi Numarası: 10.1016/j.compstruc.2006.08.076
  • Dergi Adı: COMPUTERS & STRUCTURES
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.615-625
  • Anahtar Kelimeler: reliability-based design optimization, reliability analysis, elastoplastic mechanical structures, direct computation of the beta-point
  • Atatürk Üniversitesi Adresli: Evet

Özet

In this paper, two special formulations to carry out a reliability-based design optimization of elastoplastic mechanical structures are introduced. The first approach is based on a well-known two-level method where the first level involves the optimization for the design parameters whereas the evaluation of the probabilistic constraints is carried out in a sub-optimization level. Because the evaluation of the probabilistic constraints in a sub-optimization level causes non-convergence behavior for some problems as indicated in the literature, an alternative formulation based on one-level is developed considering the optimality conditions of the beta-computation by which the probabilistic constraint appears in the first level reliability-based design optimization formulation. In both approaches, an explicit parameter optimization problem is proposed for the computation of a design point z*(x) for elastoplastic structures.