土-结构系统的非线性参数反演研究
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摘要
研究土-结构系统的非线性参数反演问题.建立了土-结构系统的二维集中质量非线性计算模型,提出了变量分离的非线性参数拟合法.利用非线性计算模型和变量分离的非线性参数反演法,实现了复杂的土-结构系统的非线性参数反演.以湖南大学建立的野外大比例尺土-结构系统的试验模型为算例,利用地震输入和系统响应,对系统的非线性动力参数进行反演.算例表明,该算法计算量小,反演精度高,可用于土-结构系统的非线性参数的在线反演.
The parameter inversion problem of soil-structure system was investigated.The 2-D lumped mass nonlinear model was established to simulate the soil-structure system,and the variables separated nonlinear parameters inversion method was proposed.The nonlinear parameters of the complicated soil-structure system were inversed according to this nonlinear calculating model and this inversion method.A field large-scale soil-structure system in Hunan University was taken as the example,and the nonlinear dynamic parameters of the system were inversed according to the seismic input and the system response.The results show that the analysis model in this paper has less computation and the algorithm is valid,which can be used for the online nonlinear parameter inversion of the soil-structure system in engineering.
The parameter inversion problem of soil-structure system was investigated.The 2-D lumped mass nonlinear model was established to simulate the soil-structure system,and the variables separated nonlinear parameters inversion method was proposed.The nonlinear parameters of the complicated soil-structure system were inversed according to this nonlinear calculating model and this inversion method.A field large-scale soil-structure system in Hunan University was taken as the example,and the nonlinear dynamic parameters of the system were inversed according to the seismic input and the system response.The results show that the analysis model in this paper has less computation and the algorithm is valid,which can be used for the online nonlinear parameter inversion of the soil-structure system in engineering.
引文
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[11]中华人民共和国建设部.JGJ3—2002.高层建筑混凝土结构技术规程[S].北京:中国建筑工业出版社,2002.Ministry of Construction of the P R China.JGJ 3—2002.Techni-cal specification for concrete structures of high-rise building[S].Beijing:China Architecture&Building Press,2002.(In Chinese)
[2]唐驾时,霍全忠.由自由振动响应识别非线性系统参数的一种方法[J].振动工程学报,1989,2(4):63-69.TANG J S,HUO Q Z.A method of nonlinear parameter idenfi-cation by free vibration response[J].Journal of Vibration Engi-neering,1989,2(4):63-69.(In Chinese)
[3]赵威.估计非线性结构参数的直接拟合法[J].地震工程与工程振动,1990,10(4):83-89.ZHAO W.A fitting directly method of estimating nonlinear struc-tural parameters[J].Earthquake Engineering and Engineering Vi-bration,1990,10(4):83-89.(In Chinese)
[4]唐驾时.非线性系统参数识别的一种频域方法[J].振动与冲击,1991,10(3):67-71.TANG J S.A method on frequency domain for parametric identi-fication of nonlinear system[J].Journal of Vibration and Shock,1991,10(3):67-71.(In Chinese)
[5]唐驾时,伊小波.非线性振动系统参数识别的频响函数[J].湖南大学学报:自然科学版,1996,23(3):35-38.TANG J S,YI X B.Frequency-response functions for parameter i-dentification of nonlinear vibration systems[J].Journal of HunanUniversity:Natural Sciences,1996,23(3):35-38.(In Chinese)
[6]LEE G M.Estimation of Non-linear system parameters usinghigher-order frequency response functions[J].Mechanical Sys-tems and Signal Processing,1997,11(2):219-228.
[7]李伟,王柯,朱德懋.基于遗传算法的非线性迟滞系统参数识别[J].振动与冲击,2000,19(1):8-11.LI W,WANG K,ZHU D M.The parametric identification of anonlinear hysteretic system based on genetic algorithm[J].Jour-nal of Vibration and Shock,2000,19(1):8-11.(In Chinese)
[8]尚守平,朱志辉,涂文戈.土-箱型基础-结构动力相互作用的模态试验分析[J].湖南大学学报:自然科学版,2004,31(5):71-76.SHANG S P,ZHU Z H,TU W G.Modal experimental analysisfor soil-box foundation-structure dynamic interaction system[J].Journal of Hunan University:Natural Sciences,2004,31(5):71-76.(In Chinese)
[9]张新培.钢筋混凝土抗震结构非线性分析[M].北京:科学出版社,2003:23-26.ZHANG X P.Nonlinear analysis for reinforced concrete seismicstructures[M].Beijing:Sciense Press,2003:23-26.(In Chi-nese)
[10]IDRISS I M,DOBRY R,SINGH R D.Nonlinear behavior of softclays during cyclic loading[J].Soil Mech and Found Div,ASCE,1978,104(12):1427-1447.
[11]中华人民共和国建设部.JGJ3—2002.高层建筑混凝土结构技术规程[S].北京:中国建筑工业出版社,2002.Ministry of Construction of the P R China.JGJ 3—2002.Techni-cal specification for concrete structures of high-rise building[S].Beijing:China Architecture&Building Press,2002.(In Chinese)
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