Inverse reliability measures and reliability-based design optimisation

Palaniappan Ramu, Xueyong Qu, Byeng Dong Youn, Raphael T. Haftka, Kyung K. Choi
2006 International Journal of Reliability and Safety  
Several inverse reliability measures (e.g. Probabilistic Performance Measure (PPM) and Probabilistic Sufficiency Factor (PSF)) that are essentially equivalent have been introduced in recent years as measures of safety. The different names for essentially the same measure reflect the fact that different researchers focused on different advantages of inverse measures. These advantages include improved computational efficiency of Reliability-Based Design Optimisation (RBDO), accuracy in Response
more » ... uracy in Response Surface Approximations (RSAs) and easy estimates of resources needed for achieving target safety levels. This paper surveys these inverse measures and describes their advantages compared with the direct measures of safety such as probability of P. Ramu et al. failure and reliability index. Methods to compute the inverse measures are also described. RBDO with inverse measure is demonstrated with a beam design example. ) 'Inverse reliability measures and reliability-based design optimisation', Int. the InfoTech -Pratt and Whitney centre for excellence as a research assistant and design engineer, respectively, till 2003. His current research interests include reliability-based design optimisation, design for low failure probabilities and surrogate-based optimisation. Xueyong Qu received his PhD in Aerospace Engineering in 2004 at the University of Florida. He received a BSc and a MEng in Aircraft Design from Nanjing University of Aeronautics and Astronautics, China. He currently works on structural optimisation software development in Altair Engineering, Inc. His research interests include structural reliability analysis and design optimisation, finite element analysis and design sensitivity analysis, composite structure analysis and optimum design.
doi:10.1504/ijrs.2006.010697 fatcat:gnxvojeh5rb2pbdfx4h5zqa324