کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
805266 1468214 2016 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Probability assessments of identified parameters for stochastic structures using point estimation method
ترجمه فارسی عنوان
ارزیابی احتمال پارامترهای مشخص برای سازه های تصادفی با استفاده از روش برآورد نقطه‌ای
کلمات کلیدی
مشکل معکوس نامشخص؛ برآورد نقطه‌ای؛ حداکثر آنتروپی؛ انتشار عدم قطعیت. ساختار تصادفی
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی مکانیک
چکیده انگلیسی


• A new computational inverse method based on point estimation is proposed.
• Uncertain inverse problem is turned into several deterministic inverse problems.
• The proposed method improves the efficiency of uncertain inverse problem.

In this paper, a kind of inverse problem for assessing the probabilities of identified parameters with uncertainties in structural parameters and limited experimental results is investigated. The point estimation method and maximum entropy principle are adopted to efficiently evaluate the effect of uncertain parameters on the identified parameters. First, the probability distribution function of each uncertain parameter can be approximately represented by several nodes. Thus, the uncertain inverse problem can be transformed into several deterministic inverse problems through multivariate Taylor expansion and point estimation method. Then, to obtain the moments of identified parameters, the deterministic inverse process for each selected node with concentrated probability are conducted by the genetic algorithm. Finally, the probability distribution functions of the identified parameters can be assessed by the obtained moments based on the maximum entropy principle. The proposed method effectively avoids the low efficiency of uncertain inverse problem, which commonly involves a double-loop procedure with uncertainty propagation and inverse calculation. Numerical examples and the engineering application demonstrate the feasibility and effectiveness of the proposed method.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Reliability Engineering & System Safety - Volume 156, December 2016, Pages 51–58
نویسندگان
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