Zobrazeno 1 - 10
of 47
pro vyhledávání: '"Zhenzhou Lu"'
Publikováno v:
IEEE Transactions on Fuzzy Systems. 30:3166-3175
A fuzzy first order and second moment method (FFOSM) is proposed to efficiently estimate time-independent and time-dependent failure credibility in the presence of fuzzy uncertainty. For the time-independent linear performance function with independe
Publikováno v:
Fuzzy Sets and Systems. 424:170-184
To improve the computational efficiency of the fuzzy simulation in estimating failure possibility of the structure containing fuzzy uncertainty, a fuzzy importance sampling method is proposed in this paper. In the proposed method, the optimal importa
Publikováno v:
International Journal for Numerical Methods in Engineering. 123:226-244
Publikováno v:
Structural and Multidisciplinary Optimization. 64:4025-4044
The system failure possibility of multi-mode structural system (referred to as system) under fuzzy uncertainty is the joint membership function of input vector at the system fuzzy design point, and it can reasonably measure the safety degree of the s
Autor:
Zhenzhou Lu, Chunyan Ling
Publikováno v:
Journal of Intelligent & Fuzzy Systems. 40:12339-12359
To measure the effects of the fuzzy inputs on structural safety degree, this paper establishes the failure credibility-based global sensitivity by the fuzzy expected value of the absolute difference between the unconditional failure credibility and c
Publikováno v:
Structural and Multidisciplinary Optimization. 63:2125-2140
Failure credibility is popular in measuring safety degree of structure under fuzzy uncertainty, but the heavy computational cost is still a challenge in estimating the failure credibility. To alleviate this issue, an iterative method combining adapti
Publikováno v:
Engineering with Computers. 38:1349-1362
Global sensitivity analysis (GSA) is useful to recognize important inputs for assigning priority and unimportant inputs for simplifying models by exploring whole distribution ranges. Meanwhile, regional sensitivity analysis (RSA) is also studied for
Autor:
Zhenzhou Lu, Xia Jiang
Publikováno v:
Structural and Multidisciplinary Optimization. 62:1025-1039
The time-dependent failure credibility (TDFC) can reasonably measure the safety level of the time-dependent structure under the fuzzy uncertainty, but the direct optimization algorithm to estimate the TDFC requires large computational cost and even r
Publikováno v:
Fuzzy Sets and Systems. 387:89-107
For more and more complicated engineering structures, it is a challenge to efficiently estimate the profust failure probability based on the probability inputs and fuzzy state assumption. By combining active learning Kriging with Monte Carlo simulati
Publikováno v:
Engineering Optimization. 53:576-593
The global fuzzy reliability sensitivity can measure the effect of input on fuzzy failure probability (FFP) through the expected difference between the unconditional FFP and the conditional one. Th...