A new method for modification of ground motions using wavelet transform and enhanced colliding bodies optimization

2016 ◽  
Vol 47 ◽  
pp. 357-369 ◽  
Author(s):  
A. Kaveh ◽  
V.R. Mahdavi
Keyword(s):  
Wavelet Transform ◽  
Ground Motions ◽  
New Method ◽  
Colliding Bodies Optimization ◽  
Enhanced Colliding Bodies Optimization

scholarly journals A New Method for Fundamental Signal Extraction Based on Wavelet Transform

Automatika ◽  
2016 ◽  
Vol 57 (2) ◽  
Author(s):  
Javad Modarresi ◽  
Eskandar Gholipour
Keyword(s):  
Wavelet Transform ◽  
New Method ◽  
Signal Extraction

scholarly journals Prof. Comparing H2 and H∞ Algorithms for Optimum Design of Tuned Mass Dampers under Near-Fault and Far-Fault Earthquake Motions

2020 ◽  
Author(s):  
Ali Kaveh ◽  
Mazyar Fahimi Fazam ◽  
Rasool Maroofiazar
Keyword(s):  
Objective Function ◽  
Optimum Design ◽  
Ground Motions ◽  
Optimization Technique ◽  
Large Set ◽  
Near Fault ◽  
Colliding Bodies Optimization ◽  
Controlled Structure ◽  
Robust Optimum Design ◽  
Far Fault

In this study, the robust optimum design of Tuned Mass Damper (TMD) is established. The H2 and H∞ norm of roof displacement transfer function are implemented and compared as the objective functions under Near-Fault (NF) and Far-Fault (FF) earthquake motions. Additionally, the consequences of different characteristics of NF ground motions such as forward-directivity and fling-step are investigated on the behavior of a benchmark 10-story controlled structure. The Colliding Bodies Optimization (CBO) is employed as an optimization technique to calculate the optimum parameters of the TMDs. The resulting statistical assessment shows that the H∞ objective function is rather superior to H2 objective function for optimum design of TMDs under NF and FF earthquake excitations. Finally, the robustness of the designed TMDs is evaluated under a large set of natural ground motions.

scholarly journals New method for denoising borehole transient electromagnetic data with discrete wavelet transform

2019 ◽  
Vol 168 ◽  
pp. 41-48 ◽  
Author(s):  
Xueping Dai ◽  
Li Zhen Cheng ◽  
Jean-Claude Mareschal ◽  
Daniel Lemire ◽  
Chong Liu
Keyword(s):  
Wavelet Transform ◽  
Discrete Wavelet Transform ◽  
New Method ◽  
Discrete Wavelet ◽  
Electromagnetic Data ◽  
Transient Electromagnetic

A Study on Maximum Responses and Their Variances of Elasto-Plastic Structures Subjected to Synthesized Ground Motions

2014 ◽  
Author(s):  
Akira Sone ◽  
Ichiro Ichihashi ◽  
Arata Masuda
Keyword(s):  
Wavelet Transform ◽  
Coefficient Of Variation ◽  
Response Spectrum ◽  
Ground Motions ◽  
Frequency Characteristics ◽  
Target Response ◽  
Maximum Displacement ◽  
Time Frequency ◽  
Earthquake Ground Motions ◽  
The Given

A number of artificial earthquake ground motions compatible with time-frequency characteristics of recorded actual earthquake ground motions as well as the given target response spectrum are generated using wavelet transform. The coefficient of variation (C.O.V..) of maximum displacement on elasto-plastic SDOF systems excited by these artificial ground motions are numerically evaluated.

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