Reliability-based robust design for flange based on OSAM and SORM

Article type: Research Article

Authors: Lin, Weiguo^a | Huang, Weijun^{a; *} | Guo, Jianwei^a | Zhang, Min^b

Affiliations: [a] College of Engineering, Huazhong Agricultural University, Wuhan, Hubei 430070, China | [b] Basic Courses Department, Wuhan Ordnance N.C.O Academy of PLA, Wuhan, Hubei 430075, China

Correspondence: [*] Corresponding author: Weijun Huang, College of Engineering, Huazhong Agricultural University, Wuhan, Hubei 430070, China. Tel.: +86 27 87282120; Fax: +86 27 87282120; E-mail:wjhuang529@mail.hzau.edu.cn

Abstract: A new integration method of the optimal square approximation method (OSAM) and the second order reliability method (SORM) was presented to ensure the mechanism structure design more reliable and robust. As for arbitrary distribution variables of mechanical structure design, the performance function of mechanical structure is expanded into the second-order Taylor series, the probability density function (PDF) and the first four moments (FFM) including the mean, the variance, the third-order moment and the fourth-order moments of performance function, which can be obtained according to the integration of OSAM and SORM. The numerical example of power-output shaft flange demonstrates that the sensitivity matrix conforms to the qualitative analysis for reliability design, and the presented integration method has the characteristics of high engineering precision in the reliability-based robust design of mechanical structure.

Keywords: Reliability-based robust design, optimal square approximation method (OSAM), second order reliability method (SORM), random variables, sensitivity matrix, flange

DOI: 10.3233/JCM-160703

Journal: Journal of Computational Methods in Sciences and Engineering, vol. 16, no. 4, pp. 943-953, 2016