| Thermoelastoplastic Deformation Analysis of Electromechanical Equipments under Electrocaloric Shock |
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| 引用本文： | 于建国 吕晨亮 叶庆泰. Thermoelastoplastic Deformation Analysis of Electromechanical Equipments under Electrocaloric Shock[J]. 东华大学学报(英文版), 2006, 23(1): 42-48 |
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| 作者姓名： | 于建国 吕晨亮 叶庆泰 |
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| 作者单位： | 640th Institute, School of Mechanical Engineering, Shanghai J iaotong University, Shanghai 200030 |
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| 摘 要： | A coupled thermomechanical model is presented to investigate the thermoelastoplastic deformation mechanism of electromechanical equipments under the condition of electrocaloric shock. In the coupling model, differentiating from the previous analyzing viewpoint that looked upon deformation work as additional heat source, temperature- field equation is established by considering the weakening role of deformation work on the intensity of internal heat source; in the process of setting up displacement-field equation, G-derivative of nonlinear functional is introduced into the traditional theory of elastoplastic finite deformation to simplify the expression of structural stiffness; stress-field equation is constructed by using the least square method to improve the stress solution obtained by constitutive equation. The presented model is converted into finite element program to simulate deforming process of 3-D structures with temperature-dependent material properties. As an example, thermal deformation analysis of Shanghai metro cars＇ brake resistor is performed and compared with experimental results for illustrating the validity of the presented model.
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| 关 键 词： | 电力机械设备 热弹性塑料 变形分析 电热冲击 |
| 收稿时间： | 2004-11-25 |
Thermoelastoplastic Deformation Analysis of Electromechanical Equipments under Electrocaloric Shock |
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| YU Jian-guo,L Chen-liang,YE Qing-tai. Thermoelastoplastic Deformation Analysis of Electromechanical Equipments under Electrocaloric Shock[J]. Journal of Donghua University, 2006, 23(1): 42-48 |
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| Authors: | YU Jian-guo L Chen-liang YE Qing-tai |
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| Affiliation: | 640th Institute, School of Mechanical Engineering, Shanghai Jiaotong University, Shanghai 200030 |
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| Abstract: | A coupled thermomechanical model is presented to investigate the thermoelastoplastic deformation mechanism of electromechanical equipments under the condition of electrocaloric shock. In the coupling model, differentiating from the previous analyzing viewpoint that looked upon deformation work as additional heat source, temperature-field equation is established by considering the weakening role of deformation work on the intensity of internal heat source; in the process of setting up displacement-field equation, G-derivative of nonlinear functional is introduced into the traditional theory of elastoplastic finite deformation to simplify the expression of structural stiffness; stress-field equation is constructed by using the least square method to improve the stress solution obtained by constitutive equation. The presented model is converted into finite element program to simulate deforming process of 3-D structures with temperature-dependent material properties. As an example, thermal deformation analysis of Shanghai metro cars' brake resistor is performed and compared with experimental results for illustrating the validity of the presented model. |
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| Keywords: | electromechanical equipments electrocaloric shock thermomechanical coupling finite element analysis |
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