Results 41 to 50 of about 1,083,308 (333)

Torsional Vibration Test on the Shaft System of Reciprocating Compressor

Shiyou jixie, 2020
One certain type of compressor suffers excessive current fluctuation. In order to solve this problem, torsional vibration test was carried out on the compressor and the test results were analyzed by means of the analog multi-frequency sine sweep method ...
Wang Yibing, Wang Kun, Yu Xiaoling, Ye Junchao   +3 more
doaj  

Ladder‐Type Benzene‐Perylene Dyes with Efficient Laser Properties in the Near‐IR by Detracting/Activating Low/High Frequency Vibronic Modes

Advanced Functional Materials, EarlyView.
The NNR‐n series of oligomeric nanographenes delivers exceptional emission performance. This work shows that this performance is originated by their ladder‐type structure, which effectively deactivates low‐frequency vibronic modes. This deactivation neglects the main pathway for non‐emissive deactivation, even in the near‐infrared region. The potential
Marcos Díaz‐Fernández, Álex Farrando Pérez, Fernando Gordillo Gámez, Pedro G. Boj, José M. Villalvilla, José A. Quintana, Yanpei Wan, Daniel Aranda, José Manuel Marín‐Beloqui, Jishan Wu, Zebing Zeng, María A. Díaz‐García, Juan Casado   +12 more
wiley   +1 more source

A generalised approach to torsionality maximisation in longitudinal-torsional ultrasonic devices [PDF]

, 2011
A longitudinal-torsional vibration mode has many applications in ultrasonic systems. Obtaining this behaviour could be achieved either by coupling the longitudinal and torsional modes or by degenerating the longitudinal mode, but the results may be ...
Al-Budairi, Hassan, Harkness, Patrick, Lucas, Margaret   +2 more
core  

Flexibility and Dynamicity Enhances and Controls Supramolecular Self‐Assembly of Zinc(II) Metallogels

Advanced Functional Materials, EarlyView.
Zinc(II) coordination complexes with tunable aryloxy‐imine ligands exhibit controllable supramolecular self‐assembly into hierarchical fibrous structures. Coordination‐driven stacking, not π–π interactions, enables gelation, dynamic assembly/disassembly, and enhanced nanomechanical properties.
Merlin R. Stühler, Hesam Makki, Dorothee Silbernagl, Mathias Dimde, Kai Ludwig, Bengt E. Tegner, Christopher Greve, Konstantin Rausch, Eva M. Herzig, Anna Köhler, Alex J. Plajer   +10 more
wiley   +1 more source

Improvement calculation accuracy of blade-shaft coupled torsional vibration by including axial shaft motion

Nihon Kikai Gakkai ronbunshu, 2019
Selected from various Eigen modes of blading, nodal diameter κ= 0 and κ= 1 are both related to shaft torsional and/or axial vibration and shaft bending vibrations respectively.
Hiroki NAKAMURA, Toru YAMAZAKI, Kazunori KASAHARA, Hiroki NAGANUMA, Osami MATSUSHITA   +4 more
doaj   +1 more source

Rotordynamic response analysis program [PDF]

, 1971
Computer routine is similar to Holzer's method in torsional vibration treatment, and Prohl's and Myklestad's approach in computing rotor deflection.
Shen, F. A.
core   +1 more source

Graphene-based tortional resonator from molecular dynamics simulation

, 2011
Molecular dynamics simulations are performed to study graphene-based torsional mechanical resonators. The quality factor is calculated by $Q_{F}=\omega\tau/2\pi$, where the frequency $\omega$ and life time $\tau$ are obtained from the correlation ...
Jiang, Jin-Wu, Wang, Jian-Sheng
core   +1 more source

Design Improvement of a Viscous-Spring Damper for Controlling Torsional Vibration in a Propulsion Shafting System with an Engine Acceleration Problem

Journal of Marine Science and Engineering, 2020
In order to cope with strengthened marine environmental regulations and to reduce fuel consumption, recently constructed vessels are equipped with an ultra-long stroke engine and apply engine de-rating technology.
Jae-hoon Jee, Chongmin Kim, Yanggon Kim
semanticscholar   +1 more source

Exploiting Two‐Photon Lithography, Deposition, and Processing to Realize Complex 3D Magnetic Nanostructures

Advanced Functional Materials, EarlyView.
Two‐photon lithography (TPL) enables 3D magnetic nanostructures with unmatched freedom in geometry and material choice. Advances in voxel control, deposition, and functionalization open pathways to artificial spin ices, racetracks, microrobots, and a number of additional technological applications.
Joseph Askey, Arjen van den Berg, Sandra Ruiz Gomez, Claire Donnelly, Dirk Grundler, Sam Ladak   +5 more
wiley   +1 more source

STUDY ON THE TORSIONAL VIBRATION OF THE SMALL ENGINE CAMSHAFT

Jixie qiangdu, 2016
In order to analysis the torsional vibration of the camshaft,the dynamic experiment of valve train was conducted to calculate the dynamic torque in this paper.
LIN Hui, DING Jia, LV Lin, GAN Wei
doaj