|Table of Contents|

Numerical Solution Algorithm to Dynamic Impedance of Foundation for Nuclear Power Plant Based on Harmonic Response(PDF)

《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

Issue:
2009年03期
Page:
65-70
Research Field:
Publishing date:
2009-09-20

Info

Title:
Numerical Solution Algorithm to Dynamic Impedance of Foundation for Nuclear Power Plant Based on Harmonic Response
Author(s):
ZHU Xiu-yun1;  LI Jian-bo1; 2;  LIN Gao1; 2;  ZHONG Hong1; 2
1. Earthquake Engineering Research Division, Dalian University of Technology, Dalian 116024, Liaoning, China; 2. State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116024, Liaoning, China
Keywords:
nuclear power plant;  dynamic impedance of foundation;  lumped parameter model;  harmonic response;  dynamic stiffness
PACS:
TU271
DOI:
-
Abstract:
In the framework of lumped parameter numerical models, the traditional soil dynamic models were only expressed by a single parallel connection system of spring and damper, which could not reflect the dynamic stiffness varying with excitation frequencies, and could not simulate the cases of nonhomogeneous site conditions. Based on the essential concepts of dynamic solution method of harmonic response, an improved numerical solution to the dynamic impedance of foundation for nuclear power plant was presented by using viscoelastic soil dynamic model, which was especially fit for the numerical simulation of nonhomogeneous soil condition, and gave the dynamic impedance of foundation varying with the excitation frequencies. To solve the problems of 2-D and 3-D types, some numerical examples were given to validate its accuracy and applicability by comparing the method with the classical solutions and lumped parameter model suggested by seismic design codes. The results show that the dynamic impedance calculated by the method can satisfy the engineering precision, and the method can take dynamic impedance of foundation changed with excitation frequencies.

References:

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Last Update: 2009-09-20