Proposition of a modal filtering method to enhance heat source computation within heterogeneous thermomechanical problems
Proposition of a modal filtering method to enhance heat source computation within heterogeneous thermomechanical problems
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DOI：
10.1016/j.ijengsci.2014.04.010
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发表时间：
2014-08
影响因子：
6.6
通讯作者：
T. Pottier;H. Louche;S. Samper;H. Favrelière;F. Toussaint;P. Vacher
中科院分区：
文献类型：
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作者：
T. Pottier;H. Louche;S. Samper;H. Favrelière;F. Toussaint;P. Vacher
本文提出了一种新的方法来评估热源的热场测量。基于动力学的模态投影（离散模态分解）被用来估计热扩散问题的空间项。一个数值例子，以验证这种方法，并将其与一个更经典的谱分解（基于热的考虑）。结果表明，所提出的投影基础不仅提供了更密切的评估的热源，但也更稳定的噪声和副作用。最后，提出了一种基富集方法，并进行了测试。它表明，虽然近似（例如，从应变测量）的热源形状的先验知识增强了伴随材料变形的热效应的评估。
This paper presents a new approach to evaluate heat sources from thermal field measurements. A modal projection based on dynamics (Discrete Modal Decomposition) is used to estimate the spatial term of a heat diffusion problem. A numerical example is presented in order to validate this approach and compare it to a more classical spectral decomposition (based on thermal considerations). Results show that the proposed projection basis not only provides closer assessment of the heat sources but is also more stable to noise and side effects. Finally, a basis enrichment method is presented and tested. It shows thata prioriknowledge of the heat sources shape though approximated (e.g. from strain measurement) enhances the assessment of calorific effects accompanying material deformation.