具有隔震构造的安全壳飞机撞击耦合动力响应模拟分析

发布时间：2018-10-22 13:23

【摘要】：建筑物隔震构造主要用于削弱地基中地震荷载对上部结构的影响,而来自上部的飞机撞击对于安全壳隔震体系的影响如何是保证核电安全值得探讨的重要问题。为评价核电站安全壳隔震体系与飞机撞击的耦合动力效应,该文提供了一种细致的模拟耦合动力分析的手段,建立了安全壳细致的动力数值模型,针对不同刚度的隔震支座及无隔震条件,进行多种类型飞机撞击作用下安全壳的动力响应分析。结果显示,飞机撞击作用期间,不同刚度的隔震支座与无隔震条件相比,撞击位置中心节点位移与冲击力的大小具有相关性,因而存在差异,而对于安全壳混凝土结构损伤区域分布则差异不大;但在撞击荷载作用后,不同刚度的隔震支座则会对安全壳振动衰减过程有较大影响。研究表明在隔震体系设计阶段,不能片面的考虑隔震体系在削弱地震响应方面的需求,需要与飞机撞击振动衰减过程耦合分析,从而确定适宜的隔震支座水平刚度等参数。
[Abstract]:The isolated structure of building is mainly used to weaken the influence of seismic load on the superstructure in the foundation, and the influence of the aircraft impact from the upper part on the containment isolation system is an important problem to be discussed to ensure the safety of nuclear power. In order to evaluate the coupling dynamic effect between containment isolation system and aircraft impact of nuclear power plant, this paper provides a detailed method for simulating coupled dynamic analysis, and establishes a detailed dynamic numerical model of containment. The dynamic response of containment subjected to various types of aircraft impact is analyzed for different stiffness isolation bearings and no isolation conditions. The results show that the displacement of the center node of the impact position and the magnitude of the impact force are different between the different stiffness of the isolation support and the non-isolation condition during the aircraft impact, so there are differences in the displacement of the center node and the impact force. However, the regional distribution of concrete structure damage is not different, but after the impact load, the vibration attenuation process of the containment will be greatly affected by the isolation bearing with different stiffness. The research shows that in the design stage of the isolation system, the needs of the isolation system in weakening the seismic response can not be considered one-sidedly, and the coupling analysis with the attenuation process of the aircraft impact vibration is needed to determine the appropriate horizontal stiffness of the isolation support and other parameters.
【作者单位】：海岸与近海工程国家重点实验室大连理工大学;工程抗震研究所建设工程学部水利工程学院大连理工大学;
【基金】：国家重点研发计划项目(2016YFB0201000) 国家自然科学基金委创新研究群体项目(51421064) 国家自然科学基金项目(51779222) 中央高校基本科研业务费项目(DUT17LK16)
【分类号】：TM623.8

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