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Influence of Torsional Vibrations on the Photoluminescence Characteristics of Dye Solutions
Journal of Fluorescence, 1998The influence of torsional vibrations of fluorophore molecule on polarization spectra and absorption/emission vibronic band profiles of isotropic dye solutions has been considered. Basing on the concept of luminescence center (LC) and assuming that (1) electronic transitions in the LC may be assisted by torsion-vibrational excitations, and (2 ...
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Applied Mechanics and Materials, 2014
The tool’s unique movement trajectory in longitudinal and torsional ultrasonic machining technology can help chip extraction. Cutting liquid can offer good lubrication, cleaning and cooling. It also can prolong tool’s life, improve the processing quality and processing efficiency, so it is widely used in precision and ultra-precision machining.
Hong Bing Zhao, Xue Hong Shen
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The tool’s unique movement trajectory in longitudinal and torsional ultrasonic machining technology can help chip extraction. Cutting liquid can offer good lubrication, cleaning and cooling. It also can prolong tool’s life, improve the processing quality and processing efficiency, so it is widely used in precision and ultra-precision machining.
Hong Bing Zhao, Xue Hong Shen
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Characteristics of Torsional Vibrations of a Shaft System with Parallel Misalignment
Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science, 2005Couplings are important parts in the movement of a shaft system. A coupling can transfer the torque from one shaft to another through deforming itself. If parallel misalignment exists, the couplings will produce an extra deformation besides the deformation produced by transferring the torque.
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Effect of Torsion on Stability, Dynamic Forces, and Vibration Characteristics in Drillstrings
Journal of Energy Resources Technology, 1997Traditionally, the analysis of stability in drillstrings is based on longitudinal vibrations only. However, field experience indicates the presence of torsional effects in the form of modulations in longitudinal vibrations. Moreover, torsional dynamic forces are significant and lead to joint problems during drilling.
M. A. Elsayed +2 more
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Rotational speed oscillation characteristic and decomposition algorithm of torsional vibration
2008 7th World Congress on Intelligent Control and Automation, 2008For analysing the torsional vibration characteristic of rotary mechanical drive system, a new highly active calculation decomposition algorithm was proposed by using series decoupled method. When the elastic driving shaft and motor shaft had speed oscillation, the decomposition algorithm could develop nonlinear differential equation into a series of ...
null Bin Liu +2 more
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SAE Technical Paper Series, 1995
<div class="htmlview paragraph">The unknown characteristics of the bending vibration coupled with torsional vibration (hereafter called“coupled torsional, bending vibration”) are investigated from the experimental and analytical viewpoints. The torsional and bending vibration stresses of the crankshafts of a 6 cylinder, in - line engine and an 8 ...
Katsuhiko Wakabayashi +3 more
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<div class="htmlview paragraph">The unknown characteristics of the bending vibration coupled with torsional vibration (hereafter called“coupled torsional, bending vibration”) are investigated from the experimental and analytical viewpoints. The torsional and bending vibration stresses of the crankshafts of a 6 cylinder, in - line engine and an 8 ...
Katsuhiko Wakabayashi +3 more
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Free torsional vibration characteristics of compound planetary gear sets
Mechanism and Machine Theory, 2001A family of torsional dynamic models of compound gear sets is developed to predict the free vibration characteristics under different kinematic configurations resulting in different speed ratios. The compound gear sets considered consist of two planes of single- or double-planet gear sets connected by a straight long planet.
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Study on Torsional Vibration Response Characteristics of Marine Propulsion Shafting
Journal of Ship Research_ The paper establishes the lumped parameter vibration mathematical model of shafting and uses the system matrix method to calculate and analyze steady-state frequency domain vibration characteristics of the shaft system in the range of diesel engine speed.
Nengqi Xiao +4 more
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Mechanics of Advanced Materials and Structures, 2018
In this paper, the torsional vibration characteristics of the high-speed and high-power reciprocating compressor shafting is investigated based on the modal superposition method (MSM) and the sensi...
Jian Liu +3 more
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In this paper, the torsional vibration characteristics of the high-speed and high-power reciprocating compressor shafting is investigated based on the modal superposition method (MSM) and the sensi...
Jian Liu +3 more
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Characteristic Frequencies and Mode Shapes for TurboGenerator Shaft Torsional Vibrations
IEEE Transactions on Power Apparatus and Systems, 1980Fundamental to the study of turbogenerator shaft torsional vibrations, as occur in subsynchronous resonance and high speed reclosing, is the calculation of the characteristic frequencies and associated mode shapes of the vibrations. A calculation procedure is discussed which is based on distributed ed system concepts and does not require matrix ...
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