Modal Superposition Method for the Analysis of Seismic-Wave Amplification

2003 ◽  
Vol 93 (3) ◽  
pp. 1144-1153 ◽  
Author(s):  
J.-F. Semblat
Keyword(s):  
Seismic Wave ◽  
Superposition Method ◽  
Wave Amplification ◽  
Modal Superposition ◽  
Modal Superposition Method ◽  
Seismic Wave Amplification

Structural Shape Reconstruction of FBG Flexible Plate Using Modal Superposition Method

2017 ◽  
Author(s):  
Li Li ◽  
Ben S. Zhong ◽  
Zi Y. Geng ◽  
Wei Sun
Keyword(s):  
Mode Shape ◽  
Shape Reconstruction ◽  
Displacement Sensor ◽  
Superposition Method ◽  
Flexible Plate ◽  
Structural Shape ◽  
Modal Superposition ◽  
Displacement Mode ◽  
Modal Superposition Method ◽  
Strain Data

Structural shape reconstruction is a critical issue for real-time structural health monitoring in the fields of engineering application. This paper shows how to implement structural shape reconstruction using a small number of strain data measured by fiber Bragg grating (FBG) sensors. First, the basic theory of structural shape reconstruction is introduced using modal superposition method. A transformation is derived from the measured discrete strain data to global displacement field through modal coordinate, which is the same for strain mode shape superposition and displacement mode shape superposition. Then, optimization of the sensor layout is investigated to achieve the effective reconstruction effect. Finally, structural shape reconstruction algorithm using modal superposition method is applied in experiments. The experiment results show that the reconstructed displacements match well with those measured by a laser displacement sensor and the proposed approach is a promising method for structural shape reconstruction.

An Error Compensation Method for Structural Responses and Sensitivities

2011 ◽  
Vol 421 ◽  
pp. 743-749
Author(s):  
Xiao Ming Wu ◽  
Chun Liu
Keyword(s):  
Error Compensation ◽  
Truncation Error ◽  
Compensation Method ◽  
Superposition Method ◽  
Truncation Errors ◽  
Modal Superposition ◽  
Modal Superposition Method ◽  
Structural Responses ◽  
Epsilon Algorithm ◽  
Modal Method

Abstract. The computation of the responses and their design sensitivities play an essential role in structural analysis and optimization. Significant works have been done in this area. Modal method is one of the classical methods. In this study, a new error compensation method is constructed, in which the modal superposition method is hybrid with Epsilon algorithm for responses and their sensitivities analysis of undamped system. In this study the truncation error of modal superposition is expressed by the first L orders eigenvalues and its eigenvectors explicitly. The epsilon algorithm is used to accelerate the convergence of the truncation errors. Numerical examples show that the present method is validity and effectiveness.

scholarly journals Seismic‐Wave Amplification in 3D Alluvial Basins: 3D/1D Amplification Ratios from Fast Multipole BEM Simulations

2016 ◽  
Vol 106 (3) ◽  
pp. 1267-1281 ◽  
Author(s):  
Kristel C. Meza‐Fajardo ◽  
Jean‐François Semblat ◽  
Stéphanie Chaillat ◽  
Luca Lenti
Keyword(s):  
Seismic Wave ◽  
Fast Multipole ◽  
Wave Amplification ◽  
Seismic Wave Amplification

Site Effects for the Sacramento-San Joaquin Delta

2009 ◽  
Vol 25 (2) ◽  
pp. 301-322 ◽  
Author(s):  
Tadahiro Kishida ◽  
Ross W. Boulanger ◽  
Norman A. Abrahamson ◽  
Michael W. Driller ◽  
Timothy M. Wehling
Keyword(s):  
Seismic Wave ◽  
Regression Models ◽  
Site Effects ◽  
Site Response ◽  
Hazard Analysis ◽  
Ground Motions ◽  
Response Spectra ◽  
Organic Soils ◽  
Wave Amplification ◽  
Seismic Wave Amplification

Seismic site response and site effects models are presented for levees in the Sacramento-San Joaquin Delta where the subsurface soils include thick deposits of highly organic soils. Sources of uncertainty that contribute to the variation of seismic wave amplification are investigated, including variations in the input ground motions, soil profiles, and dynamic soil properties through Monte Carlo simulations of equivalent-linear site response analyses. Regression models for seismic wave amplification for levees in the Delta are presented that range from a function of peak outcrop acceleration alone to a vector of response spectra ordinates and soil profile parameters. The site effects models were incorporated into a probabilistic seismic hazard analysis for a representative location, and the relative impacts of the various models on the computed hazard are evaluated.

Sound Transmission in Dual-Coupling System of Elastic Plate and Acoustic Cavity Based on Modal Superposition Method

2013 ◽  
Vol 475-476 ◽  
pp. 1474-1478
Author(s):  
Hong Qiu Li ◽  
Guo Ping Chen
Keyword(s):  
Elastic Plate ◽  
Sound Transmission ◽  
Superposition Method ◽  
Acoustic Cavity ◽  
Modal Superposition ◽  
Coupling System ◽  
Modal Superposition Method ◽  
Cavity System ◽  
Coupling Characteristics ◽  
Plate System

This paper presents a study on the dual-coupling characteristics between elastic plate and acoustic cavity. Modal superposition method was employed to analyze sound transmission in the plate-cavity-plate system and cavity-plate-cavity system. Impedance and mobility methods were also adopted which were easy to investigate the characteristics between the structural and acoustic systems. The expression of sound transmission between plate-cavity-plate system and cavity-plate-cavity system were given.

Sign in / Sign up

Export Citation Format

Share Document