Results 61 to 70 of about 47,692 (213)

Flutter and forced response of mistuned rotors using standing wave analysis [PDF]

, 1983
A standing wave approach is applied to the analysis of the flutter and forced response of tuned and mistuned rotors. The traditional traveling wave cascade airforces are recast into standing wave arbitrary motion form using Pade approximants, and the ...
Also M., Bisplinghoff R.L., Duqund, Edwards J ., Snyder L.E., Srinivasan A.V., Vepa R., Whitehead D.S.   +7 more
core   +2 more sources

Vibration characteristics of 1/8-scale dynamic models of the space-shuttle solid-rocket boosters [PDF]

Vibration tests and analyses of six 1/8 scale models of the space shuttle solid rocket boosters are reported. Natural vibration frequencies and mode shapes were obtained for these aluminum shell models having internal solid fuel configurations ...
Barret, J. R., Leadbetter, S. A., Majka, J. W., Sewall, J. L., Stephens, W.   +4 more
core   +1 more source

Multi-Band Torsional Vibration Amplitude Demodulation for Planetary Gearbox Fault Diagnosis Under Time-Varying Speed Conditions

IEEE Access
Torsional vibration signal analysis is promising for diagnosing gear faults in planetary gearboxes. However, early-stage fault signatures are relatively-weak and may be ignored or wrongly identified in conventional demodulation analysis, especially under
Xiaowang Chen, Yubo Sun, Ying Zhang, Zhipeng Feng   +3 more
doaj   +1 more source

Resonant Characteristics of Rectangular Microcantilevers Vibrating Torsionally in Viscous Liquid Media [PDF]

, 2012
The resonant characteristics of rectangular microcantilevers vibrating in the torsional mode in viscous liquid media are investigated. The hydrodynamic load (torque per unit length) on the vibrating beam due to the liquid was first determined using a ...
Brand, Oliver, Cai, Tao, Dufour, Isabelle, Heinrich, Stephen M., Josse, Fabien, Nigro, Nicholas J.   +5 more
core   +3 more sources

Surface response of spherical core-shell structured nanoparticle by optically induced elastic oscillations of soft shell against hard core

, 2009
The optically induced oscillatory response of a spherical two-component, shell-core structured, nanoparticle by nodeless elastic vibrations of soft peripheral shell against hard and dynamically immobile inner core is considered.
Bertsch G. F., D. V. PODGAINY, H.-K. CHANG, I. V. MOLODTSOVA, P.-Y. LAI, S. I. BASTRUKOV, Ye Z.   +6 more
core   +1 more source

Modelling and validation of off-road vehicle ride dynamics [PDF]

, 2011
Increasing concerns on human driver comfort/health and emerging demands on suspension systems for off-road vehicles call for an effective and efficient off-road vehicle ride dynamics model.
Cao, Dongpu, Pazooki, Alireza, Rakheja, Subhash   +2 more
core   +2 more sources

Research on Doubly-Fed Wind Turbine Shaft System With Virtual Inertia for Torsional Vibration Analysis

发电技术
ObjectivesShafting mathematical model of wind turbine is the basis of torsional vibration characteristics analysis. Shafting model is very important for the reliability of analysis results.
SUN Zhenglong, SAN Jiqiang
doaj   +1 more source

Partial Frequency Assignment for Torsional Vibration Control of Complex Marine Propulsion Shafting Systems

Applied Sciences, 2019
With the large-scale and complexity of ship propulsion shafting, it is more difficult to analyze and control the torsional vibration of shafting. Therefore, an effective control method for the torsional vibration of shafting is of great significance in ...
Meilong Chen, Huajiang Ouyang, Wanyou Li, Donghua Wang, Siyuan Liu   +4 more
doaj   +1 more source

Modeling and Analysis of Amplitude-Frequency Characteristics of Torsional Vibration for Automotive Powertrain

Shock and Vibration, 2020
In the present paper, the amplitude-frequency characteristics of torsional vibration are discussed theoretically and experimentally for automotive powertrain.
Jinli Xu, Jiwei Zhu, Feifan Xia
doaj   +1 more source

Breakdown of the mirror image symmetry in the optical absorption/emission spectra of oligo(para-phenylene)s [PDF]

, 2005
The absorption and emission spectra of most luminescent, pi-conjugated, organic molecules are the mirror image of each other. In some cases, however, this symmetry is severely broken.
Andrew C. Grimsdale, David Beljonne, Egbert Zojer, Emil J. W. List, Georg Heimel, Grimme J., Jean-Luc Brédas, Johannes Gierschner, Klaus Müllen, Maria Daghofer   +9 more
core   +3 more sources