Results 51 to 60 of about 2,760,319 (175)

Vibration Characteristics of Composite Pan Blades and Comparison with Measured Data [PDF]

Journal of Aircraft, 1976
The vibration characteristics of a composite fan blade for high-tip-speed applications were determined theoretically and the results compared with measured data. The theoretical results were obtained using a computerized capability consisting of NASTRAN coupled with composite mechanics by way of pre- and postprocessors.
openaire   +1 more source

Breathing crack identification of rotating blades using blade tip timing based on envelope diagram images and optimized CNN model

Journal of Low Frequency Noise, Vibration and Active Control
As a promising non-contact blade vibration monitoring technology, the blade tip timing (BTT) method is crucial for monitoring the operational state of rotating blades in large turbo-machinery through recording vibration signals of blade tips.
Minghao Pan, Yongmin Yang, Fengjiao Guan, Haifeng Hu, Zifang Bian, Wenkang Huang, Bohao Xiao, Ang Li   +7 more
doaj   +1 more source

Study on identification of modal parameters of turbomachinery blade and impeller

Nihon Kikai Gakkai ronbunshu, 2020
To develop turbomachinery blades with high reliability, it is indispensable to verify the natural frequency, the damping, the resonant stress, etc. under operating condition, and utilize these data in the mechanical design of a new blade.
Yasutomo KANEKO, Kazushi MORI, Tatsuya FURUKAWA   +2 more
doaj   +1 more source

Operational Deflection Shape Measurements on Bladed Disks with Continuous Scanning Laser Doppler Vibrometry

Sensors
The continuous scanning laser Doppler vibrometry (CSLDV) technique is usually used to evaluate the vibration operational deflection shapes (ODSs) of structures with continuous surfaces.
Cuihong Liu, Tengzhou Xu, Tao Chen, Shi Su, Jie Huang, Yijin Li   +5 more
doaj   +1 more source

ECL5/CATANA: Comparative Analysis of Advanced Blade Vibration Measurement Techniques

International Journal of Turbomachinery, Propulsion and Power
A comprehensive understanding of aerodynamic instabilities, such as flutter, non-synchronous vibration (NSV), rotating stall, and forced response, is crucial for the safe and efficient operation of turbomachinery, particularly fans and compressors. These
Christoph Brandstetter, Alexandra P. Schneider, Anne-Lise Fiquet, Benoit Paoletti, Kevin Billon, Xavier Ottavy   +5 more
doaj   +1 more source

Analytical Formulation of the Jacobian Matrix for Non-linear Calculation of the Forced Response of Turbine Blade Assemblies with Wedge Friction Dampers [PDF]

, 2006
A fundamental issue in turbomachinery design is the dynamical stress assessment of turbine blades. In order to reduce stress peaks in the turbine blades at engine orders corresponding to blade natural frequencies, friction dampers are employed.
Gola M.M, GOLA, Muzio, Borrajo J.M, Zucca, Stefano, BORRAJO J. M   +4 more
core   +1 more source

Latest Technology in Vibrational Measurement for Rotational Machinery Blades

JOURNAL OF THE MARINE ENGINEERING SOCIETY IN JAPAN, 1990
There are many machines having rotating parts such as blower, compressor including steam turbine and gas turbine. The moving blades, in particular, among rotating parts are the major element which has an influence upon the product reliability. The purposes of measuring the blade vibration are classified into the f ollowig three categories.The first ...
Mase, Masataka, Kaneko, Yasutomo, Kadoya, Yoshiki   +2 more
openaire   +2 more sources

Development of an Active Flap Rotor Model [PDF]

, 2004
The research organizations ONERA and DLR initiated a common programme supported by Eurocopter (EC) and Eurocopter Deutschland (ECD) as industry partners within the Active Blade Concept (ABC).
Höfinger, Marc T., Leconte, Philippe
core  

A novel method for noise reduction of blade tip timing signals based on sparse representation and dictionary learning

Journal of Low Frequency Noise, Vibration and Active Control
Blade Tip Timing Technology (BTT) is a new type of blade vibration measurement method with non-contact measurement capabilities, which is associated with high efficiency and convenience.
Hua Zheng, Guanyu Fang, Shiqiang Duan, Hang Li   +3 more
doaj   +1 more source

Numerical Investigation of Vibration Reduction Through IBC for a 20to Helicopter Rotor Model [PDF]

, 2002
This paper presents theoretical results of vibration reduction through IBC (Individual Blade Control) for a 20to helicopter rotor model which are based on numerical computations.
van der Wall, Berend G., Auspitzer, Thomas, Höfinger, Marc T., Fürst, Daniel   +3 more
core