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Reliability Analysis of Systems with Nonlinear Limit States; Application to Automotive Door Closing Effort
Technical Paper
2003-01-0142
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
In this paper, an efficient method for the reliability analysis of systems with nonlinear limit states is described. It combines optimization-based and simulation-based approaches and is particularly applicable for problems with highly nonlinear and implicit limit state functions, which are difficult to solve by conventional reliability methods. The proposed method consists of two major parts. In the first part, an optimization-based method is used to search for the most probable point (MPP) on the limit state. This is achieved by using adaptive response surface approximations. In the second part, a multi-modal adaptive importance sampling method is proposed using the MPP information from the first part as the starting point. The proposed method is applied to the reliability estimation of a vehicle body-door subsystem with respect to one of the important quality issues -- the door closing effort. The superiority of the proposed method, in terms of efficiency and accuracy, is demonstrated with a numerical example of highly nonlinear limit state problem, as well as an automotive door closing effort application. A generalized framework for reliability estimation is also proposed for problems with large numbers of random variables and complicated limit states.
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Citation
Zou, T., Mahadevan, S., Mourelatos, Z., and Meernik, P., "Reliability Analysis of Systems with Nonlinear Limit States; Application to Automotive Door Closing Effort," SAE Technical Paper 2003-01-0142, 2003, https://doi.org/10.4271/2003-01-0142.Also In
Reliability & Robust Design in Automotive Engineering on CD-ROM
Number: SP-1736CD; Published: 2003-03-03
Number: SP-1736CD; Published: 2003-03-03
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