Results 21 to 30 of about 3,492 (237)

Influence of the Radial Clearance of a Squeeze Film Damper on the Vibratory Behavior of a Single Spool Gas Turbine Designed for Unmanned Aerial Vehicle Applications

Shock and Vibration, 2017
This study presents a numerical investigation using the finite element method on the vibratory behavior of a single spool gas turbine designed for unmanned aerial vehicle applications. The shaft of the rotor-bearing system is supported on a front bearing
Geraldo Creci, José Orlando Balastrero, Sidney Domingues, Luis Vanderlei Torres, João Carlos Menezes   +4 more
doaj   +1 more source

Investigation about Electrorheological Squeeze Film Damper Applied to Active Control of Rotor Dynamic

International Journal of Rotating Machinery, 1997
Electrorheological (ER) fluids, discovered in 1947 by W. WINSLOW, are concentrated suspensions of solid particles in an oily base liquid. Exposed to a strong electric field, their resistance to flow increases very greatly and this change is progressive ...
Benjamin Pecheux, Olivier Bonneau, Jean Frêne   +2 more
doaj   +1 more source

Numerical computation of the damping and stiffness coefficients of the classical and magnetorheological squeeze film damper

MATEC Web of Conferences, 2018
Technological solution, frequently used to suppress vibrations in rotating machines, consists in adding damping devices between the rotor and its frame.
Ferfecki Petr, Zapoměl Jaroslav, Šofer Michal, Pochylý František, Fialová Simona   +4 more
doaj   +1 more source

Static Stiffness Parametric Studies of Newly Conceptualized Inter Shaft Squeeze Film Damper (ISSFD) Rings

International Journal of Engineering Materials and Manufacture, 2019
Most of the modern gas turbine engine designs requiring super critical operations will often have squeeze film dampers (SFDs) on the high pressure spool bearing as an inevitable feature.
SHIVAPRASAD MALLAIAH HIRENALLUR, GIRIDHARA G GAIKWAD, ARUNKUMAR V   +2 more
doaj   +1 more source

Multi-Objective Optimization Design of a Novel Integral Squeeze Film Bearing Damper

Machines, 2021
In order to better control the vibration of the rotor system so as to improve the stability and safety of the rotor, a novel vibration control solution is needed.
Yipeng Zhang, Lidong He, Jianjiang Yang, Gang Zhu, Xingyun Jia, Wei Yan   +5 more
doaj   +1 more source

Research on the Dynamic Characteristics of High-Speed Rotors Supported by a Double Layer Squeeze Film Damper-Bearing Composite Structure

IEEE Access
In this study, a dynamic model for a damper-bearing-rotor system featuring a novel double layer squeeze film damper-bearing composite structure was developed, addressing the limitations of conventional single layer dampers in providing sufficient ...
Wei Wang, Weimin Wang, Weibo Li, Jiale Wang, Tianqing Li   +4 more
doaj   +1 more source

Stability of Intershaft Squeeze Film Dampers [PDF]

, 1991
Intershaft squeeze film dampers were investigated for damping of dual rotor aircraft jet engines. It was thought that the intershaft damper would enhance the stability of the rotor-bearing system.
El-Shafei, A.
core   +1 more source

Transducers Across Scales and Frequencies: A System‐Level Framework for Multiphysics Integration and Co‐Design

Advanced Materials Technologies, EarlyView.
Transducers convert physical signals into electrical and optical representations, yet each mechanism is bounded by intrinsic trade‐offs across bandwidth, sensitivity, speed, and energy. This review maps transduction mechanisms across physical scale and frequency, showing how heterogeneous integration and multiphysics co‐design transform isolated ...
Aolei Xu, Mengyao Xiao, Zhouli Sui, Yinpeng Wang, Daoye Zheng, Yuxin Liu, Luwei Wang, Huajun Liu, Chengkuo Lee   +8 more
wiley   +1 more source

Dual clearance squeeze film damper [PDF]

, 1985
A dual clearance hydrodynamic liquid squeeze film damper for a gas turbine engine is described. Under normal operating conditions, the device functions as a conventional squeeze film damper, using only one of its oil films.
Fleming, D. P.
core   +1 more source

Apparent stress-strain relationships in experimental equipment where magnetorheological fluids operate under compression mode [PDF]

, 2008
: This paper presents an experimental investigation of two different magnetorheological ( MR) fluids, namely, water-based and hydrocarbon-based MR fluids in compression mode under various applied currents.
A G Olabi, Carmignani C, Forte P, Genc S, Hagenbuchle M, Kraus J D, Mazlan S A, Monkman G J, N B Ekreem, S A Mazlan   +9 more
core   +1 more source