Results 251 to 260 of about 74,074 (298)
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Coupled modes of the torsion pendulum
Physics Letters A, 2008zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Fan, Xiang-Dong +4 more
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Statistical thermodynamics of bond torsional modes
The Journal of Chemical Physics, 2000We present a formalism for treating torsions in complex molecules with nonsymmetry-related multiple minima along the internal rotation coordinate. We also present a comparison of rectilinear and curvilinear methods for estimating the moment of inertia of an internal rotor, and we find that they sometimes differ considerably. We point out that the usual
Yao-Yuan Chuang, Donald G. Truhlar
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Torsional Vibration Modes of Tapered Bars
Journal of Applied Mechanics, 1952Abstract The author offers a solution for the differential equation which governs the torsional vibration modes of a shaft or bar, these modes being simple harmonic functions of time.
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IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, 2013
Small-sized defects in pipes can be better detected if the first nondispersive torsional mode is used in a higher frequency range. However, dispersive higher torsional modes accompany the first mode if the actuation frequency is above the first cutoff frequency, thereby making the detection difficult.
Hoe Woong, Kim +3 more
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Small-sized defects in pipes can be better detected if the first nondispersive torsional mode is used in a higher frequency range. However, dispersive higher torsional modes accompany the first mode if the actuation frequency is above the first cutoff frequency, thereby making the detection difficult.
Hoe Woong, Kim +3 more
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Scanning Conductive Torsion Mode Microscopy
2015In this chapter, we introduce a special non-contact scanning probe based current sensing technique: scanning conductive torsion mode microscopy (SCTMM), which allows for simultaneous topography and electrical current mapping on solid samples. Due to the low interacting force between the probe and sample surface, this new technique is particularly ...
Ling Sun, Elmar Bonaccurso
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An Abnormal Vibrational Mode of Torsion Pendulum
Chinese Physics Letters, 2003In the experiment for the determination of the gravitational constant G, we found an abnormal vibrational mode of the torsion pendulum. The abnormal mode disappeared as a magnetic damper was introduced to the torsion pendulum system. Our experimental results also show that the magnetic damper can be used to suppress the high frequency vibrational ...
Zhao Liang +4 more
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1969
Torsional-mode transducers represent cylindrical rods of resonance length (normally λto/2). We distinguish two basic techniques for the excitation of torsional vibrations in cylinders: 1) the application of torques from external driving sources; 2) the generation of these moments in the cylinder itself by virtue of the ...
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Torsional-mode transducers represent cylindrical rods of resonance length (normally λto/2). We distinguish two basic techniques for the excitation of torsional vibrations in cylinders: 1) the application of torques from external driving sources; 2) the generation of these moments in the cylinder itself by virtue of the ...
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2nd Mode Shape Torsional Vibration - Observation, Identification, Mitigation
SPE/IADC International Drilling Conference and Exhibition, 2023Abstract This paper investigates the drill pipe twist-offs that occurred while drilling an S-shaped well in the 12 ¼" section. The presence of the 2nd mode shape of torsional vibration was observed and linked to the failure.
Sahet Keshiyev +2 more
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Coupling and degenerating modes in longitudinal–torsional step horns
Ultrasonics, 2012Longitudinal-torsional vibration is used and proposed for a variety of ultrasonic applications including motors, welding, and rock-cutting. To obtain this behavior in an ultrasonic step horn one can either, (i) couple the longitudinal and torsional modes of the horn by incorporating a ring of diagonal slits in the thick base section or, (ii) place ...
Patrick, Harkness +2 more
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Comparison of torsional and longitudinal modes using phacoemulsification parameters
Journal of Cataract and Refractive Surgery, 2009To compare phacoemulsification parameters of torsional and longitudinal ultrasound modes.Ophthalmology Department, Military Health Service Institute, Warsaw, Poland.This prospective study evaluated eyes 1, 7, and 30 days after phacoemulsification with an Infiniti Vision System using the torsional or longitudinal ultrasound (US) mode.
Marek, Rekas +5 more
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