基于LRB和FPS隔震策略的小型堆安全壳地震响应分析  

Seismic Response Analysis of Small Modular Reactor Containment Based on LRB and FPS Isolation Strategies

作　　者：姬晓宇 陈南宇 陈睦锋 张帅军 侯钢领 蔡雪松 JI Xiaoyu;CHEN Nanyu;CHEN Mufeng;ZHANG Shuaijun;HOU Gangling;CAI Xuesong(Yantai Research Institute,Harbin Engineering University,Yantai 264006,China;Guangzhou Institute of Science and Technology,Guangzhou 510540,China)

机构地区：[1]哈尔滨工程大学烟台研究院,山东烟台264006 [2]广州理工学院,广东广州510540

出　　处：《原子能科学技术》2025年第4期900-910,共11页Atomic Energy Science and Technology

基　　金：广东珠海LNG扩建项目二期工程EPC工程创优基金(Z2023LGENT1210);黑龙江省重点研发计划(2022ZX01A14);新兴方向培育专项计划(3072024XX2718)。

摘　　要：为验证在安全停堆地震动(SSE)下不同隔震策略对于小型堆安全壳的隔震效果,本研究利用有限元方法对小型堆安全壳结构进行三维建模,采用铅芯橡胶支座(LRB)和摩擦摆支座(FPS)对安全壳结构进行隔震设计,通过模态分析提取结构的前4阶振型和自振频率,进而对小型堆安全壳进行地震响应分析。通过研究安全停堆地震动下的结构响应,评估不同隔震策略在小型堆上的适用性。结果显示:LRB和FPS隔震方案将小型堆安全壳的自振周期延长至2.46 s和2.53 s。在小型堆安全停堆地震下,LRB和FPS隔震结构顶点水平加速度减震率为74.6%和63.2%,安全壳结构峰值水平变形可减小75.1%和68.4%。证明LRB和FPS隔震策略可提高小型堆结构的抗震性能。Small modular reactor(SMR)refers to a new generation of reactors with a unit power output of less than 300 MW.These reactors utilize innovative technologies for modular design and rapid onsite assembly.The assurance of structural seismic safety becomes a crucial prerequisite for the commercial application of SMR.Traditional seismic resistance theories enhance the strength and stiffness of the structure itself to resist earthquake-induced damage.In contrast,seismic isolation theory employs isolation devices to absorb and dissipate seismic energy,thereby reducing structural deformation and damage and better protecting the internal equipment and piping.To verify the effectiveness of different seismic isolation strategies for SMR under safe shutdown earthquake(SSE)conditions,this study uses the finite element method(FEM)to conduct three-dimensional modeling of the SMR containment structure.Modal analysis is performed to extract the first four modes of vibration and natural frequencies of the structure.Lead rubber bearings(LRB)and friction pendulum systems(FPS)were utilized for the seismic isolation design of the SMR structure,and finite element models of the isolated SMR structures were established.Subsequently,seismic response analyses of the SMR containment structure were conducted.By studying the structural response under SSE and double SSE conditions,the applicability of different seismic isolation strategies for SMR was evaluated.The results show that the natural vibration periods of the SMR containment structure are extended to 2.46 s and2.53 s based on the LRB and FPS isolation schemes.Under the SSE,the acceleration reduction rates at the peak of the LRB and FPS isolated structures are 74.6%and 63.2%,and the peak horizontal deformation of the containment structure can be reduced by 75.1%and 68.4%.Under the double SSE,the maximum tensile stress peaks of the containment structure can be reduced by 33.5%and 35.8%with the LRB and FPS isolation strategies.In non-isolated structures,tensile damage is mostly concentr

关 键 词：小型堆 隔震设计 铅芯橡胶支座 摩擦摆支座 

分 类 号：TL48[核科学技术—核技术及应用] TU312[建筑科学—结构工程]