柔性基础对ICF装置稳定性的影响
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摘要
为探讨土-结构相互作用(SSI)对惯性约束聚变(ICF)装置在地脉动作用下响应的影响,建立了某ICF装置刚性地基和柔性地基两种有限元模型。通过设置人工虚拟边界的弹簧单元和阻尼装置来考虑SSI效应,并且通过设置具有概率意义的弹簧刚度和阻尼系数,来模拟岩土特性参数的不确定性。两个模型地脉动随机响应结果的对比分析,揭示了柔性地基条件下SSI效应及岩土地基参数不确定性对装置的影响。研究表明,考虑岩性地基的柔性时,ICF装置主要部位的位移响应和转角响应分别放大了1.24和1.49倍。
In order to study the influence of flexible foundation on the stability of ICF facility due to ambient vibration,two models are established for the "rigid" foundation and the flexible foundation,respectively.The soil-structure interaction(SSI) is considered by setting the springs and dampers on the dummy boundary,and uncertain soil properties are simulated by setting some stochastic parameters for stiffness of the springs and damping factors of the dampers.The influences of SSI and uncertain soil properties on the response of ICF facility are revealed by comparing simulation results of the two models.The ratios of the major displacement response and the rotation response in the flexible foundation model to those in the "rigid" foundation model are 1.24 and 1.49,respectively.
In order to study the influence of flexible foundation on the stability of ICF facility due to ambient vibration,two models are established for the "rigid" foundation and the flexible foundation,respectively.The soil-structure interaction(SSI) is considered by setting the springs and dampers on the dummy boundary,and uncertain soil properties are simulated by setting some stochastic parameters for stiffness of the springs and damping factors of the dampers.The influences of SSI and uncertain soil properties on the response of ICF facility are revealed by comparing simulation results of the two models.The ratios of the major displacement response and the rotation response in the flexible foundation model to those in the "rigid" foundation model are 1.24 and 1.49,respectively.
引文
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[16]陈学前,杜强,冯加权.神光Ⅲ原型装置环境条件及其测试技术研究[R].GF-A0093112G,2007.(Chen Xueqian,Du Qiang,Feng Jiaquan.The researching on the ambient conditions and the testing technique of the Shenguang-Ⅲprototype equipment.GF-A0093112G,2007)
[2]Hao H.Torsional response of building structure to spatial random ground excitations[J].Engineering Structures,1997,19(2):105-112.
[3]Avilés J,Suárez M.Effective periods and dampings of building-foundation systems including seismic wave effects[J].Engineering Struc-tures,2002,24(5):553-562.
[4]刘晶波,吕彦东.结构-地基动力相互作用问题分析的一种直接方法[J].土木工程学报,1988,31(3):55-64.(Liu Jingbo,LüYandong.A di-rect method on analyzing the soil-structure interaction.China Civil Engineering Journal,1988,31(3):55-64)
[5]王凤霞,何政,欧进萍.桩-土-结构动力相互作用的线弹性地震反应分析[J].世界地震工程,2003,6(19):58-66.(Wang Fengxia,HeZheng,Ou Jinping.The elastic seismic response analysis of pile-soil-structure interaction systems.World Earthquake Engineering,2003,6(19):58-66)
[6]孟昭博,吴敏哲,胡卫兵,等.考虑土-结构相互作用的西安钟楼地震反应分析[J].世界地震工程,2008,24(4):125-129.(Meng Zhaobo,WuMinzhe,Hu Weibing,et al.Seismic response analysis of Xi’an Bell Tower considering soil-structure interaction.World Earthquake Engi-neering,2008,24(4):125-129)
[7]陈跃庆,吕西林,李培振,等.不同土性的地基-结构动力相互作用振动台模型试验对比研究[J].土木工程学报,2006,39(5):58-64.(ChenYueqing,LüXilin,Li Peizhen,et al.Comparative study on the dynamic soil-structure interaction system with various soils by using shakingtable model tests.China Civil Engineering Journal,2006,39(5):58-64)
[8]尚守平,朱志辉,吴方伯.土-箱基-框架结构动力相互作用大比例模型野外试验研究[J].工程力学,2006,23(10):118-124.(Shang Shou-ping,Zhu Zhihui,Wu Fangbo.Large-scale field model test on dynamic soil-box foundation-structure interaction.Engineering Mechanics,2006,23(10):118-124)
[9]Tabatabaie M,Sommer S C.Analysis of soil-structure interaction due to ambient vibration[R].UCRL-JC-130342,1998.
[10]高丹盈,汤寄予,朱海堂.钢纤维高强混凝土的配合比及基本性能研究[J].郑州大学学报:工学版,2004,25(3):46-51.(Gao Danying,Tang Jiyu,Zhu Haitang.Research on mixing and elementary properties of steel fiber reinforced high-strength concrete.Journal of Zheng-zhou University:Engineering Science,2004,25(3):46-51)
[11]施士晟.混凝土的抗剪强度、剪切模量和弹性模量[J].土木工程学报,1999,32(2):47-52.(Shi Shisheng.Shear strength,modulus of ri-gidity and Young’s modulus of concrete.China Civil Engineering Journal,1999,32(2):47-52)
[12]李亚林,谢贤鹏,贺振华,等.地层条件下CX盆地地表岩样动弹参数的实验分析[J].成都理工学院学报,1999,26(2):161-167.(Li Yalin,Xie Xianpeng,He Zhenhua,et al.The experimental analysis of dynamic elastic parameters of exposure rock samples under formation condi-tions in CX basin.Journal of Chengdu University of Technology,1999,26(2):161-167)
[13]尤明庆.岩石试样的杨氏模量与围压的关系[J].岩石力学与工程学报,2003,21(2):53-60.(You Mingqing.Effect of confining pressure onthe Young’s modulus of rock specimen.Chinese Journal of Rock Mechanics and Engineering,2003,21(2):53-60)
[14]李忠献,李忠诚,梁万顺.考虑土-结构相互作用和岩土参数不确定性的核电厂结构地震响应分析[J].地震工程与工程振动,2006,26(2):143-148.(Li Zhongxian,Li Zhongcheng,Liang Wanshun.Seismic response analysis of nuclear power plant structures considering soil-structure interaction and uncertainty of soil properties.Earthquake Engineering and Engineering Vibration,2006,26(2):143-148)
[15]刘晶波,王振宇,杜修力,等.波动问题中的三维时域粘弹性人工边界[J].工程力学,2005,22(6):46-51.(Liu Jingbo,Wang Zhenyu,DuXiuli,et al.Three-dimensional visco-elastic artificial boundaries in time domain for wave motion problems.Engineering Mechanics,2005,22(6):46-51)
[16]陈学前,杜强,冯加权.神光Ⅲ原型装置环境条件及其测试技术研究[R].GF-A0093112G,2007.(Chen Xueqian,Du Qiang,Feng Jiaquan.The researching on the ambient conditions and the testing technique of the Shenguang-Ⅲprototype equipment.GF-A0093112G,2007)
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