Results 11 to 20 of about 118,827 (219)

Comparison of Force Reconstruction Methods for a Lumped Mass Beam

Shock and Vibration, 1997
Two extensions of the force reconstruction method, the sum of weighted accelerations technique (SWAT), are presented in this article. SWAT requires the use of the structure’s elastic mode shapes for reconstruction of the applied force.
Vesta I. Bateman, Randall L. Mayes, Thomas G. Carne   +2 more
doaj   +1 more source

Determination of Axial Force in Tie Rods of Historical Buildings Using the Model-Updating Technique

Applied Sciences, 2020
Tie rods are structural elements that transfer axial tensile loads and are typically used on walls, vaults, arches, and buttresses in historical buildings.
Ivan Duvnjak, Suzana Ereiz, Domagoj Damjanović, Marko Bartolac   +3 more
doaj   +1 more source

Analysis of Seismic Action on the Tie Rod System in Historic Buildings Using Finite Element Model Updating

Buildings, 2021
Historic buildings have a high architectural value and their maintenance, repair and rehabilitation require a special approach. This approach is mainly based on the buildings’ performance under non-destructive tests such as operational modal analysis ...
Suzana Ereiz, Ivan Duvnjak, Domagoj Damjanović, Marko Bartolac   +3 more
doaj   +1 more source

Crack identification in multiple cracked beams made of functionally graded material by using stationary wavelet transform of mode shapes

Vietnam Journal of Mechanics, 2019
This paper presents crack identification in multiple cracked beams made of functionally graded material (FGM) by using stationary wavelet transform (SWT) of mode shapes and taking into account influence of Gaussian noise.
Tran Van Lien, Ngo Trong Duc
doaj   +1 more source

A method of calculating the reflection and transmission coefficients required for controlling the nodal positions of a mode shape as desired in a three-dimensional beam structure

Nihon Kikai Gakkai ronbunshu, 2022
This paper addresses a method of controlling the nodal positions of mode shapes as desired. The method is developed to calculate reflection and transmission coefficients at discontinuities and ends required for shaping mode shapes. The method is based on
Yuichi MATSUMURA, Haruto KATSUNO, Tomo YAMADA, Masashi KOMADA, Hidenori MORITA   +4 more
doaj   +1 more source

Model Updating Using Measurements from Sensors Installed in Arbitrary Positions and Directions

Applied Sciences, 2019
The present study proposes a method for model updating using measurements from sensors installed in arbitrary positions and directions. Modal identification provides mode shapes for physical quantities (acceleration strain, etc.) measured in specific ...
Keunhee Cho, Young-Hwan Park, Jeong-Rae Cho   +2 more
doaj   +1 more source

Role of Sensors in Error Propagation with the Dynamic Constrained Observability Method

Sensors, 2021
The inverse problem of structural system identification is prone to ill-conditioning issues; thus, uniqueness and stability cannot be guaranteed. This issue tends to amplify the error propagation of both the epistemic and aleatory uncertainties, where ...
Tian Peng, Maria Nogal, Joan R. Casas, Jose Turmo   +3 more
doaj   +1 more source

New approach based on operational strain modal analysis to identify dynamical properties of the high-speed reciprocating operation mechanism

Journal of Low Frequency Noise, Vibration and Active Control, 2019
A high-speed reciprocating operating mechanism with fast running and frequent stopping produces a certain vibration due to inertia. The inherent vibration of this mechanism becomes a key factor affecting positioning accuracy and time.
Xuchu Jiang, Bin Li, Xinyong Mao, Yili Peng, Songping He   +4 more
doaj   +1 more source

Modal Parameters Estimation of Building Structures from Vibration Test Data Using Observability Measurement

Shock and Vibration, 2015
The load distribution to each mode of a structure under seismic loading depends on the modal participation factors and mode shapes and thus the exact estimation of modal participation factors and mode shapes is essential to analyze the seismic response ...
Jae-Seung Hwang, Hongjin Kim, Bong-Ho Cho   +2 more
doaj   +1 more source

Numerical and Experimental Analysis of the Effects of Crack on Vibration Characteristics of GFRP-stiffened Pipes [PDF]

Journal of Stress Analysis, 2019
In this paper, the vibration characteristics of GFRP-stiffened pipes, in intact and cracked conditions are investigated. The results have different applications, which the most important ones are optimized designs of such pipes and diagnosis of the ...
M.H. Velayatparvardeh, A. Shooshtari
doaj   +1 more source