基于土-结构相互作用的核电厂房抗飞机撞击耦合分析与模型验证

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摘要相互作用是结构-地基体系在冲击载荷作用下动力响应的重要影响因素，尤其非岩基场地条件下地基对结构的刚度约束作用有所削弱，有效而合理地开展地基等因素模拟是保证结论可靠性的关键前提。本文结合高温气冷堆示范项目在飞机撞击条件下的动力特性分析开展了细致研究，提出了一种细致模拟的耦合动力分析方法，其中基于飞机载荷曲线和墙体冲击变形等因素，对密切关系到分析规模的模型网格疏密特征进行了精细对比分析；对完整地基场地进行建模，并在边界处设置完美匹配层(PML)模拟无限地基辐射阻尼效应；对不同柔、硬场地条件及飞机撞击的不同位置进行对比分析，得出上部结构振动响应的影响因素。模型参数的敏感性分析可为精细化模型的标准化建模提供依据，而数值结果显示在非岩基场地条件下，土-结构相互作用对于核电厂房抗飞机撞击的整体动力响应，尤其是楼层反应谱有较显著的影响。

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	王友刚1
	孙运轮1
	李建波2
	3
	李晓红1
	陈岩1
	梅润雨2
	3
	牛燕如2
	3
	林皋2
	3

关键词 ：高温气冷堆, 相互作用, 精细化, 人工边界, 振动响应

Abstract：The interaction is an important factor of the dynamic response of the structure - soil system under the impact load, especially under the condition of non - rock foundation site, the rigidity constraint of the structure is weakened. The effective and reasonable simulation of the foundation and other factors is the key premise to ensure the reliability of the conclusion. In this paper, combined with the analysis of dynamic characteristics of HTGR demonstration project under the condition of aircraft impact, a coupling dynamic analysis method of detailed simulation is proposed. Based on the factors such as aircraft load curve and wall impact deformation, the grid density closely related to the analysis scale is analyzed. A perfect matching layer (PML) is set up at the boundary to simulate the radiation damping effect of infinite foundation. The different soft and hard site conditions and different positions of aircraft impact are compared and analyzed, and the influencing factors of superstructure vibration response are obtained. The sensitivity analysis of the model parameters can provide the basis for the standardized modeling of the refined model, and the numerical results show that the soil structure interaction has a significant impact on the overall dynamic response of the nuclear power plant against aircraft impact in the condition of non - rock foundation site, especially the floor spectrum.

Key words： high temperature gas - cooled reactor interaction refinement artificial boundary vibration response

收稿日期: 2020-10-20 出版日期: 2022-03-28

引用本文:

王友刚1，孙运轮1，李建波2,3，李晓红1，陈岩1，梅润雨2,3，牛燕如2,3，林皋2,3. 基于土-结构相互作用的核电厂房抗飞机撞击耦合分析与模型验证[J]. 振动与冲击, 2022, 41(6): 115-122.
WANG Yougang1，SUN Yunlun1，LI Jianbo2,3，LI Xiaohong1，CHEN Yan1，MEI Runyu2,3，NIU Yanru2,3，LIN Gao2,3. Coupling analysis and model verification of anti aircraft impact on a nuclear power plant structure considering the soil-structure interaction. JOURNAL OF VIBRATION AND SHOCK, 2022, 41(6): 115-122.

链接本文:

http://jvs.sjtu.edu.cn/CN/ 或 http://jvs.sjtu.edu.cn/CN/Y2022/V41/I6/115

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