The Frequency Domain Decomposition (FDD) method has been extensively applied in modal analysis of structures under operational conditions. It is based on the singular value decomposition of the Power Spectral Density matrix of structural responses. The modal frequencies of the structure are picked from...
The solution of the time-history analysis is obtained through a Newmark integration method, assuming a Rayleigh viscous damping\(\zeta\)equal to 0.03 for the first\(\mathrm {T}_y\)and fourth\(\mathrm {T}_x\)modes. In succession, thanks to the research version of the solver allowing to ...
System and method for 3D frequency domain waveform inversion based on 3D time-domain forward modeling According to a first preferred aspect of the instant invention, there is provided an efficient method of computing a 3D frequency domain waveform inversion based on 3D time domain modeling. In the...
An operational modal analysis method in frequency and spatial domain A frequency and spatial domain decomposition method (FSDD) for operational modal analysis (OMA) is presented in this paper, which is an extension of the co... 王彤,张令弥,田村幸雄 - 《地震工程与工程振动(英文版)》 被引量: ...
The solution of the resultant linear algebraic system employs the lower-upper (LU) decomposition method. Symmetry properties can be exploited, and the open multi-processing (OpenMP) parallelization technique can be applied to reduce the computation burden. The accuracy and the efficiency of the ...
Singular value decomposition was found to produce better results than LU decomposition of the design matrix. The feasibility of the deconvolution method and of the algorithm are demonstrated using both synthetic and experimental data. Copyright 1999 Academic Press. 展开 ...
Three-dimensional parallel frequency-domain visco-acoustic wave modelling based on a hybrid direct/iterative solver We present a parallel domain decomposition method based on a hybrid direct-iterative solver for 3D frequency-domain modelling of visco-acoustic waves. The ... F Sourbier,A Haidar,L Gi...
A time-domain macromodel method is proposed in this paper to deal with the field-to-wire coupling. The proposed method is equivalent to the frequency-domain moment method, but the size is greatly reduced. The extraction of the macromodel is actually a process of full-wave simulation. Once ext...
On spatial filtering for angle-of-arrival estimation in a scattering environment by eigendecomposition-based methods Applying the conventional bandpass filters used in the spatial frequency domain, the spatial filtering method effectively suppresses the unwanted coherence ... C Zhou,F Haber - 《Antennas...
For 2D and 3D frequency-domain elastic wave modeling, a parallel iterative solver based on a conjugate gradient acceleration of the symmetric Kaczmarz row-projection method, named the conjugate-gradient-accelerated component-averaged row projections (CARP-CG) method, shows interesting convergence ...