PWR堆芯燃料组件非线性梁模型研究
Study on Nonlinear Beam Model of PWR Fuel Assembly
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摘要: 为描述燃料组件的非线性特性，采用有限元方法建立燃料组件横向梁模型，并引入迟滞模型，用于模拟燃料组件横向变形时的非线性效应。计算结果表明：该非线性梁模型能够更准确地获得组件的弯曲变形和受力，有助于开展燃料组件事故分析。Abstract: In order to describe the nonlinear characteristics of the fuel assembly, a lateral beam model of assembly is built by the finite element method. The beam model is embedded with the hysteretic model to simulate the nonlinear effect occurred at lateral deformation. The calculation shows that the bending deformation and force can be derived from the nonlinear beam model, which is beneficial for the analysis of fuel assembly accidents.
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Key words:
- Fuel assembly /
- Beam model /
- Nonlinear effect /
- Finite element analysis
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