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  

Coupling analysis and model verification of anti aircraft impact on a nuclear power plant structure considering the soil-structure interaction

作　　者：王友刚 孙运轮 李建波[2,3] 李晓红 陈岩 梅润雨 牛燕如 林皋[2,3] WANG Yougang;SUN Yunlun;LI Jianbo;LI Xiaohong;CHEN Yan;MEI Runyu;NIU Yanru;LIN Gao(Chinergy Co.,Ltd.,Beijing 100193,China;State Key Laboratory of Coastal and Offshore Engineering,Dalian University of Technology,Dalian 116024,China;Institute of Earthquake Engineering,Dalian University of Technology,Dalian 116024,China)

机构地区：[1]中核能源科技有限公司,北京100193 [2]大连理工大学海岸与近海工程国家重点实验室,辽宁大连116024 [3]大连理工大学工程抗震研究所,辽宁大连116024

出　　处：《振动与冲击》2022年第6期115-122,共8页Journal of Vibration and Shock

基　　金：国家科技重大专项(2018ZX06902016);国家自然科学基金(51779222);中央高校基本科研业务费(DUT20TD209)。

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。该研究结合某核电厂房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。The interaction between structure and soil is an important factor for the dynamic responses of a structure-soil system under impact load,especially in the case of non-rock foundation site,the rigidity constraint on the structure by the foundation is somewhat weakened.The effective and reasonable simulation of the foundation and other factors is the key premise to ensure the reliability of the conclusion.In the paper,combining with the analysis of the dynamic characteristics in a nuclear power plant(NPP)structure under the condition of aircraft impact,a coupling dynamic analysis method for detailed simulation was proposed.Based on the factors such as aircraft load curve and wall impact deformation,the effect of grid density closely related to the analysis scale was analyzed.A perfect matching layer(PML)was set up at the boundary to simulate the radiation damping effect of an infinite foundation.The different soft and hard site conditions and different locations of aircraft impact were compared and analyzed,and the influencing factors on superstructure vibration responses were obtained.The sensitivity analysis of the model parameters was carried out,providing a basis for the standardized modeling of the refined model.The numerical results show that the soil structure interaction has a significant impact on the overall dynamic responses of the nuclear power plant structure against aircraft impact in the condition of non-rock foundation site,especially on the floor spectrum the effect is rather evident.

关 键 词：核电厂房 相互作用 精细化 人工边界 振动响应 

分 类 号：TU352[建筑科学—结构工程]