Results 21 to 30 of about 47,269 (302)
Optimization of VEDs for Vibration Control of Transmission Line Tower
Advances in Civil Engineering, 2021 This paper investigates the optimization of viscoelastic dampers (VEDs) for vibration control of a transmission line tower. Considering the stiffness of the steel brace connected to a VED, the mechanical model of the VED-brace system was established ...
Guoping Huang +4 more
doaj +1 more source
The Determination of Modal Damping Ratios and Natural Frequencies from Bispectrum Modeling [PDF]
OCEANS '87, 1987 We present a new signal processing and testing technique by using a higher statistical moment, the bispectrum, to determine the damping ratio and natural frequency of offshore structures excited by both unexpected Gaussian forces and known non-Gaussian driving forces. Due to unexpected exciting forces, such as turbulence, in the ocean, environment, the
Liou, C. -Y., Chang, C. -C.
openaire +2 more sources
Study of the effect of specimen size and frequency on the structural damping property of beam
Mechanical Engineering Journal, 2016 It is said that the parameters that characterize structural damping, i.e., the loss factor, are identical to the material of the specimen, but in actuality, the damping property is sometimes affected by specimen size or the frequency.
Shozo KAWAMURA +3 more
doaj +1 more source
Significance of low energy impact damage on modal parameters of composite beams by design of experiments [PDF]
, 2009 This paper presents an experimental study on the effects of multi-site damage on the vibration response of composite beams damaged by low energy impacts around the barely visible impact damage limit (BVID).
A Shahdin +9 more
core +5 more sources
Errors in Estimating Modal Damping Ratio.
TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series C, 1995 The purpose of this paper is to investigate the effect of measurement errors on the modal damping ratio. Errors in estimating modal damping ratio are derived for various curve-fitting methods. For the iterative method, errors in estimating modal damping ratio are induced by bias errors in the frequency response function.
Makoto Watanabe, Michiharu Okano
openaire +2 more sources
Damage monitoring in sandwich beams by modal parameter shifts: a comparative study of burst random and sine dwell vibration testing [PDF]
, 2010 This paper presents an experimental study on the effects of multi-site damage on the vibration response of honeycomb sandwich beams, damaged by two different ways i.e., impact damage and core-only damage simulating damage due to bird or stone impact or ...
Gourinat, Yves +2 more
core +3 more sources
On the robustness of the average power ratios in damping estimation: application in the structural health monitoring of composites beams [PDF]
, 2010 In composites structures, cracking, delamination will cause changes in the measured dynamic response of structure and so on experimentally modal parameters.
Morlier, Joseph, Yin, H.P.
core +3 more sources
Shock and Vibration, 2020 To reduce the vibration of the plate-like structure under different boundary conditions, an all-metal damping composite structure was proposed, and its damping layer was entangled metallic wire material (EMWM).
Fuhao Peng +4 more
doaj +1 more source
IEEE Access, 2020 In order to machine complex box and shell structures, the cutter with large ratio of length to diameter is usually used, whereas the low rigidity of the cutter hinders the increase of the stable machining parameters.
Yan Xia +6 more
doaj +1 more source
Model Updating for Systems with General Proportional Damping Using Complex FRFs
Shock and Vibration, 2020 In this paper, we propose a model updating method for systems with nonviscous proportional damping. In comparison to the traditional viscous damping model, the introduction of nonviscous damping will not only reduce the vibration of the system but also ...
Xinhai Wu +3 more
doaj +1 more source