石墨块碰撞模型的理论与参数识别研究

彭星铭; 张弛; 吴耀祖; 兰天宝; 罗亚军

doi:10.21656/1000-0887.450295

石墨块碰撞模型的理论与参数识别研究

doi: 10.21656/1000-0887.450295

1. 中国核电工程有限公司，北京 100840;
2. 西安交通大学复杂服役环境重大装备结构强度与寿命全国重点实验室; 航天航空学院，西安 710049

基金项目:

国家自然科学基金（12372155）

详细信息

作者简介:
彭星铭（1987—），男，高级工程师；罗亚军（1980—），男，教授（通讯作者. E-mail: luoyajun@mail.xjtu.edu.cn).

通讯作者:
罗亚军（1980—），男，教授（通讯作者. E-mail: luoyajun@mail.xjtu.edu.cn).

中图分类号: O327|TB123
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- 文章访问数: 12
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- PDF下载量: 2
- 被引次数: 0
出版历程
- 收稿日期: 2024-10-30
- 修回日期: 2025-05-27
- 网络出版日期: 2025-12-31

The Theory and Parameter Identification for the Graphite Block Collision Model

1. China Nuclear Power Engineering Co., Ltd., Beijing 100840, P.R.China;
2. State Key Laboratory for Strength and Vibration of Mechanical Structures; School of Aerospace Engineering, Xi’an Jiaotong University，Xi’an 710049, P.R.China

Funds:

The National Science Foundation of China(12372155)

摘要

摘要: 石墨堆芯作为气冷反应堆的核心构件，在地震载荷作用下可能因构件间隙引发碰撞，直接影响反应堆安全，研究其碰撞动力学特性对核工程安全评估具有重要意义.核设备的抗震分析常对整体系统进行简化后（如模态叠加法）开展高效动力学计算，因此寻找线性化的堆芯碰撞行为分析模型非常必要.首先，基于石墨块的碰撞行为开展了经典的LN碰撞模型和Kelvin碰撞模型，并开展了线性简化模型的建模理论分析；然后，探讨了模型参数对其碰撞行为的影响规律，进而提出了一种碰撞模型参数的迭代识别算法；最后，搭建了一套石墨块的碰撞试验系统，采集了不同初速度下的碰撞响应并对碰撞特征量进行了统计分析，实现了碰撞模型的参数识别和线性等效模型的有效性验证.研究工作可为含石墨堆芯等碰撞构件的核设备抗震分析模型提供重要参考依据.
- 石墨堆芯 /
- 间隙 /
- 碰撞模型 /
- 参数识别 /
- 碰撞试验
Abstract: The graphite core, as the crucial component of a gas-cooled reactor, may trigger collision due to the gap between components under seismic loads, to affect the safety of the reactor. Studying its collision dynamic characteristics is of great significance for the safety assessment of nuclear engineering. For seismic analysis of nuclear equipment, the whole system is often simplified (such as the modal superposition method) to carry out efficient dynamic calculations, so it is necessary to find a linearized core collision behavior analysis model. The classical L-N collision modeling, the Kelvin collision modeling, and the modeling theory analysis of the linear simplified model were carried out based on the collision behaviors of graphite blocks. Then, the effects of model parameters on its collision behaviors were discussed, and an iterative recognition algorithm for model parameters was proposed. Finally, a dedicated collision test system for graphite blocks was established. The collision responses under various initial velocities were measured, to enable the statistical analysis of collision characteristics, the parameter identification for the collision model, and the validation of the linear equivalent model. This study can provide an important reference for the seismic analysis model for nuclear equipment containing graphite cores and other collision components.
- graphite core /
- clearance /
- collision model /
- parameter identification /
- collision experiment

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参考文献(23)

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