Results 21 to 30 of about 131,690 (264)
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 +2 more
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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
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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 +2 more
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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 +3 more
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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 +4 more
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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 +2 more
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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
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An Investigation of Complex Mode Shapes
, 2022 This paper presents an investigation of complex mode shape analysis caused by non-linear damping. Nowadays, most academics are accustomed to complex mode shapes, which are a characteristic of most axisymmetric structures. The topic was deeply investigated during the 1980s, sparking the sharpest debates about their physical existence or not.
Verhoeven, C. +4 more
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Fluid Structure Interaction Using Modal Superposition and Lagrangian CFD
Journal of Marine Science and EngineeringThis study investigates the impact of fluid loads on the elastic deformation and dynamic response of linear structures. A weakly coupled modal solver is presented, which involves the solution of a dynamic equation of motion with external loads.
Manigandan Paneer +5 more
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On the Dynamic Analysis of a Beam Carrying Multiple Mass-Spring-Mass-Damper System
Shock and Vibration, 2014 The exact natural frequencies, mode shapes, and the corresponding orthogonality relations are important in forced vibration analysis via modal expansion.
O. Barry, D. C. D. Oguamanam, J. W. Zu
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