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基于ANSYS二次开发技术的土层随机地震反应分析
引用本文:周爱红,袁颖,张鸿儒.基于ANSYS二次开发技术的土层随机地震反应分析[J].煤炭学报,2007,32(11):1175-1178.
作者姓名:周爱红  袁颖  张鸿儒
作者单位:1北京交通大学 土木建筑工程学院,北京,100044 2石家庄经济学院 勘查技术学院,河北 石家庄,050031
摘    要:利用虚拟激励法,将随机振动分析转化为一系列简谐振动分析,根据激励与响应之间的关系,提出一种直接输入加速度的加载方式,打破了传统意义上ANSYS谐响应分析中必须输入简谐力的限制;采用等价线性化法模拟材料的非线性,扩充了ANSYS的本构模型,并利用ANSYS的高级APDL语言编制了相应的外挂式程序.最后以非线性均质土层为例,研究了在5种不同方法下,等幅剪应变取值对随机地震反应的影响.结果表明:等幅剪应变不同取值方法,对等价剪切模量、等价阻尼比和位移标准差影响很大,建议采用直接插值法模拟材料非线性.

关 键 词:ANSYS二次开发  随机振动  直接加速度法  等效线性  虚拟激励法  
文章编号:0253-9993(2007)11-1175-04
收稿时间:2006-11-24
修稿时间:2006年11月24

Analysis of stochastic seismic responses of soil layers based on the secondary development of ANSYS
ZHOU Ai-hong,YUAN Ying,ZHANG Hong-ru.Analysis of stochastic seismic responses of soil layers based on the secondary development of ANSYS[J].Journal of China Coal Society,2007,32(11):1175-1178.
Authors:ZHOU Ai-hong  YUAN Ying  ZHANG Hong-ru
Abstract:Firstly,based on pseudo-excitation method,stochastic vibration analysis was converted into a series of simple harmonic vibration analysis.Secondly,according to the relationship between excitation and response,a direct acceleration iuput method was proposed breaking the limitation that traditionally harmonic force must be inputted for harmonic response analysis in ANSYS.Thirdly,equivalent linearization model was used to simulate the nonlinearity of material which expanded the constitutive model of ANSYS.The plug-in corresponding program was developed using the advanced ANSYS Parameter Design Language(APDL).Finally,taken the non-linear isotropic soil layer as an example,the effects of values of different constant amplitude shear strains for five different methods on the response of stochastic earthquake were studied.The results indicate that the values of different constant amplitude shear strains have great influence on the equivalent shear modulus,the equivalent damping ratio,the standard deviation for displacement and the direct interpolation equivalent linearization model was suggested.
Keywords:second development of ANSYS  stochastic vibration  direct acceleration method  equivalent linearization method  pseudo-excitation method
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