Results 251 to 260 of about 106,634 (300)

The derivation of modal damping ratios from complex-plane response plots

Journal of Sound and Vibration, 1973
Theoretically derived Kennedy-Pancu type plots for two-degree-of-freedom systems are evaluated to assess the likely accuracy of the determination of natural frequencies and damping ratios from empirical plots. Within the region in which an amplitude/frequency plot alone is inadequate, it is shown that there is a much more restricted region (an ...
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Theoretical Determination of Modal Damping Ratio of Sloshing Using a Variational Method

Journal of Pressure Vessel Technology, 2011
This paper investigates a variational method for theoretically determining the first damping ratio of sloshing in cylindrical and arbitrary axisymmetric tanks. In this method, a virtual work expression for the viscous terms in the Navier–Stokes equations is transformed into the first-mode damping term, thereby extending Hamilton’s principle for ...
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Identification of natural frequencies and modal damping ratios from response data

The Journal of the Acoustical Society of America, 1976
Response data are processed in the frequency domain to determine natural frequencies and modal damping ratios of a multidegree-of-freedom system. The excitation can be either deterministic or a random function of time. When the time history of the excitation is now known, the method requires its power spectral density to be flat. An iterative scheme is
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Conditioned NExT Analysis, A Technique for Estimation of Modal Damping Ratios of Operating Piston Engines

SAE Technical Paper Series, 1999
<div class="htmlview paragraph">A new approach of estimating the modal parameters of operating piston engines is presented. The developed approach represents a combination of concepts from currently existing analyses such as the natural excitation technique (NExT), conditioned input analysis (CIA), and conditioned source analysis (CSA), and is ...
Kiran Govindswamy, Michael F. Albright
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Analytical determination of equivalent modal damping ratios of a composite tower in wind-induced vibrations

Computers & Structures, 1996
Abstract We present two methods to determine the equivalent modal damping ratios of a composite tower under wind-induced vibrations. Different damping characteristics arise from the construction of the tower with two materials; for the lower main part, say of reinforced concrete and an upper part, say of steel.
Huang, BC, Leung, AYT, Lam, KM, Cheung, YK   +3 more
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Investigation into vibration-based structural damage identification and amplitude-dependent damping ratio of reinforced concrete bridge deck slab under different loading states

Journal of Civil Structural Health Monitoring, 2022
Sania Gohar, Y. Matsumoto, T. Maki, Satoru Sakuma   +3 more
semanticscholar   +1 more source

Calculation on Modal Damping Ratio of Stay Cable Using Nonlinear Friction Damper

Advanced Materials Research, 2012
Stay cables of long span cable-stayed bridges are easy to vibrate under wind or wind/rain loads owning to their very low inherent damping. To install cable dampers near to the anchorages of cable has become a common practice for cable vibration control of cable-stayed bridge structures.
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Design Using Modal Damping Ratios

2021
George A. Papagiannopoulos, George D. Hatzigeorgiou, Dimitri E. Beskos   +2 more
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Modal Damping Ratio and Optimal Elastic Moduli of Human Body Segments for Anthropometric Vibratory Model of Standing Subjects.

Journal of Biomechanical Engineering, 2017
M. Gupta, T. C. Gupta
semanticscholar   +1 more source

Modal parameter identification and damping ratio estimation from the full-scale measurements of a typical Tibetan wooden structure

Earthquake Engineering and Engineering Vibration, 2016
Lu Dai, N. Yang, S. Law, Qingshan Yang
semanticscholar   +1 more source