کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
513821 866654 2013 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Model updating of a dynamic system in a high-temperature environment based on a hierarchical method
موضوعات مرتبط
مهندسی و علوم پایه مهندسی کامپیوتر نرم افزارهای علوم کامپیوتر
پیش نمایش صفحه اول مقاله
Model updating of a dynamic system in a high-temperature environment based on a hierarchical method
چکیده انگلیسی


• Model updating in a high temperature environment is proposed based on the hierarchical method.
• Theoretical and numerical examples using the hierarchical method are presented.
• A method to improve the robustness and efficiency of the temperature field updating method was researched.
• The RBF with the difference basis function was evaluated by ANOVA.
• The analysis of variance method was used in dynamic structure model updating.

In the past, structural model updating methods have been widely researched as a means to reconcile mathematical models because the key parameters in dynamic systems often change during their life cycle due to repair and replacement of parts or the environment. However, there is very little literature that references model updating under the condition of complicated multi-physics fields such as a high temperature environment (HTE). In this paper, model updating in an HTE is proposed based on the hierarchical method, and an iterative procedure is presented. With this method, the temperature field updating of a structure is taken as the first stage, and the multi-objective optimization method and a surrogate model of radial-basis functions are introduced to improve the robustness and efficiency of this stage, respectively. Then, the temperature distribution achieved from the former is imposed on the structure as a thermal load, and the residuals of the modal characteristics are taken as objective functions to update the dynamic model of the structure in HTE. The proposed method is tested on an FE model of a wing model, and the analysis of variance approach is employed to evaluate the parameter variability significance and to select the updating variable. The results of the study show that the developed hierarchical method is capable of identifying the input parameters of the temperature field and structure with good accuracy.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Finite Elements in Analysis and Design - Volume 77, December 2013, Pages 59–68
نویسندگان
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