Results 11 to 20 of about 47,269 (302)
Damping Ratio Estimation of Heavily Damped Structures Using State-Space Modal Responses [PDF]
SensorsVibration control systems are extensively utilized in structures to enhance their resilience against earthquakes and wind forces. However, structures with significant damping exhibit atypical damping behaviors, which impose constraints on the ...
Jungtae Noh +2 more
doaj +4 more sources
Energies, 2023 The high-frequency vibration and resonance of armature assembly in the hydraulic servo valve are the main reasons for instability and failure. Magnetic fluid (MF) operating in the squeeze mode can be taken as an effective damper for resonance suppression
Jinghui Peng +4 more
doaj +3 more sources
Equivalent Modal Damping Ratios of a Composite Tube-Type Tall Building to Dynamic Wind Loading [PDF]
Shock and Vibration, 1996 This article discusses computing methods of the equivalent modal damping ratio for a composite tube-type tall building. The equivalent damping ratio of a composite structure under wind-induced vibrations encompasses the combined effects from the ...
B.C. Huang +3 more
doaj +4 more sources
Estimation of damping ratios of steel structures by Operational Modal Analysis method
Journal of Constructional Steel Research, 2015 Abstract In this study, it is aimed to compare the modal damping ratios attained by considering the measurement duration, frequency range, sampling rate, and the method used in modal parameter identification as variable parameters. The investigations were performed on a 3 storey steel building model.
Kudu, Fatma Nur +4 more
openaire +4 more sources
Effect of the frequency spacing on modal damping estimation of a double-layer grid [PDF]
مهندسی عمران شریف, 2021 Although natural frequencies and mode shapes can be accurately measured by dynamic tests, error bounds in values of damping estimation can be large. Since damping strongly influences the design and control of structures, efforts are made to find the ...
S. Salehi +2 more
doaj +1 more source
Crystals, 2021 The variation in the viscous damping coefficient with the carbon fiber angle can be evaluated using the partial derivatives of the viscous damping coefficient with respect to the resonance frequency and modal damping ratio.
Chan-Jung Kim
doaj +1 more source
Experimental and computational evaluation of modal identification techniques for structural damping estimation [PDF]
E3S Web of Conferences, 2022 The damping ratio is a key indicator of a structures susceptability to human discomfort due to dynamic loads. Computational models, wind tunnel studies and empirical data can provide estimates of the damping ratio of a structure.
Moore Hollie +2 more
doaj +1 more source
Time-Domain Calculation Method of an Equivalent Viscous Damping Model Based on Complex Damping Model
Shanghai Jiaotong Daxue xuebao, 2021 The damping matrix of the complex damping model is easy to be constructed, which only depends on the material loss factor and the structural stiffness matrix.
SUN Panxu, YANG Hong, ZHAO Zhiming, LIU Qinglin
doaj +1 more source
International Journal of Naval Architecture and Ocean Engineering, 2022 The hydrodynamic damping characteristics of elastic rotating propeller blades are investigated theoretically and experimentally. Firstly, the modal hydrodynamic damping ratio of propeller blade rotating in water is theoretically predicted based on the ...
Hongyang Chen +3 more
doaj +1 more source
International Journal for Simulation and Multidisciplinary Design Optimization, 2021 The current study focussed on analysing natural frequency and damping of laminated composite beams (LCBs) by varying fiber angle, aspect ratio, material property and boundary conditions.
Naidu Balireddy Somi +3 more
doaj +1 more source