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データ同化に基づく鋳造プロセスにおける伝熱解析のパラメータ推定

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Please use this identifier to cite or link to this item:http://hdl.handle.net/2115/75378

Title: データ同化に基づく鋳造プロセスにおける伝熱解析のパラメータ推定
Other Titles: Parameter Estimation in Heat Conduction Problem of Casting Processes Based on Data Assimilation
Authors: 岡, ゆきみ1 Browse this author
大野, 宗一2 Browse this author →KAKEN DB
松浦, 清隆3 Browse this author →KAKEN DB
Authors(alt): Oka, Yukimi1
Ohno, Munekazu2
Matsuura, Kiyotaka3
Keywords: casting
data assimilation
parameter estimation
heat transfer coefficient
thermal conductivity
Issue Date: 1-Dec-2017
Publisher: 日本鉄鋼協会
Journal Title: 鉄と鋼
Volume: 103
Issue: 12
Start Page: 755
End Page: 762
Publisher DOI: 10.2355/tetsutohagane.TETSU-2017-031
Abstract: Heat transfer analyses of casting processes offer an effective way of understanding solidification processes which is important for prevention of formation of casting defects and for control of segregations. The accuracy of the simulations depends on the accuracy of input parameters such as thermal conductivity and heat transfer coefficient. It is not straightforward to evaluate such parameters, especially thermal conductivities of bulks and heat transfer coefficient with high accuracy. It is very important to develop a reliable method for estimation of these parameters. In this study, particle filter, which is a method of data assimilation, is applied to estimation of thermal conductivity of melt and heat transfer coefficient during alloy solidification in mold casting and its applicability is systematically investigated on the basis of twin experiments. It is shown that a constant heat transfer coefficient can be accurately estimated in this method by utilizing a single cooling curve measured in the mold or in the melt near the mold, while the thermal conductivity can be accurately estimated from a single cooling curve measured in the melt. In addition, this method can be utilized for estimation of time-dependent heat transfer coefficient without any assumption and/or approximation on its time dependence. Importantly, the thermal conductivity and time-dependent heat transfer coefficient can be estimated simultaneously with high accuracy.
Rights: 著作権は日本鉄鋼協会にある
Type: article
URI: http://hdl.handle.net/2115/75378
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 大野 宗一

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