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Wednesday, July 22, 2020 | History

1 edition of A theoretical and experimental investigation of a tuned torsional vibration absorber found in the catalog.

A theoretical and experimental investigation of a tuned torsional vibration absorber

by Henry John Marciniak

  • 8 Want to read
  • 40 Currently reading

Published by Naval Postgraduate School in Monterey, California .
Written in English

    Subjects:
  • Mechanical engineering

  • ID Numbers
    Open LibraryOL25128405M

      A device has been designed and built to allow one to systematically investigate the dynamical behavior of a wide variety of torsional vibration absorbers (TVAs). These are devices that can passively absorb the torsional vibration of a wide Cited by: 2. The authors designed a novel type of dynamic vibration absorber, called periodic vibration absorber (PVA), for mechanical systems subjected to periodic excitation. Since the periodic rather than single harmonic excitation is themost occurring case in mechanical systems, the design of PVA is hence of engineering significance. The PVA designed in this paper is composed of a dual-beam Cited by: 6.

    This paper presents the design of torsional adaptive tunable vibration absorber (ATVA) using magnetorheological elastomers (MREs) for vibration reduction of powertrain systems. The MRE used for the ATVA development consists of a silicone polymer, silicone oil and magnetic particles with the weight fractions are 60%, 20%, 20%, by: 2. Vibration, Vol. 2, Pages Adaptive Torsional Tuned Vibration Absorber for Rotary Equipment This paper investigates the coupled mechanics of a fluid-conveying microtube embedded inside an elastic medium and subject to a pretension.

    The present study proposes and exploits an effective method of suppressing the vibration of cantilever plates similar to the solar panels of a satellite. Magnetically tuned mass dampers (mTMDs) are a tuned mass damper (TMD) with eddy current damping (ECD). We introduce the mTMD concept for the multimode vibration suppression of the cantilever by: 3. Hongxiang Yao, Xing Wang, Zhan Hu and Gangtie Zheng, Theoretical and experimental investigation of a tunable vibration absorber with liquid elastic chamber, Journal of Sound and Vibration, /, , (), ().


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A theoretical and experimental investigation of a tuned torsional vibration absorber by Henry John Marciniak Download PDF EPUB FB2

A mathematical model for the absorber with base excitation is developed and the theoretical values of the torsional amplitude are calculated for different values of excitation frequency. The theoretical and experimental results are correlated. Key words — Absorber system, natural frequency, excitation.

Bibliography: p. A theoretical and experimental investigation of a tuned torsional vibration : This banner text can have markup. web; books; video; audio; software; images; Toggle navigation. Experimental Investigation of Centrifugal Pendulum Vibration Absorber.

An experimental setup for testing centrifugal pendulum absorbers is described. Centrifugal pendulum vibration absorbers are used for attenuation of torsional vibrations in rotating and reciprocating machines.

AN EXPERIMENTAL INVESTIGATION INTO TORSIONAL VIBRATION IN BALL MILLS R. Heidecker, S. Drew and B. Stone Department of Mechanical and Materials Engineering University of Western Australia Nedlands W.A.

Australia. ABSTRACT Torsional vibration in ball mills can be a serious problem -even leading to failure. In the. Abstract. This paper presents results from tests completed on a rotor system fitted with pendulum-type centrifugal torsional vibration absorbers.

A review of the associated theoretical background is also given and the experimental and theoretical results are compared andcontrasted.

An overview of the test apparatus is provided Cited by: This paper presents results from tests completed on a rotor system fitted with pendulum-type centrifugal torsional vibration absorbers. A review of the associated theoretical background is also given and the experimental and theoretical results are compared andcontrasted.

Torsional Vibration Tune Mass Damper Vibration Absorber Absorber Mass Synchronous Response These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm by: 1.

Parameters of the absorber are fully discussed to optimize the efficiency of it. For the resonance, the maximum motion is restrained up to 90% by the optimized absorber. For the impulse, the vibration of the structure could attenuate rapidly.

In addition to the high efficiency, energy transmits to the absorber by: 5. write the book on mechanical vibrations, contributed both theoretical knowledge and instrumentation experience. Den Hartog also insisted that the correct terminology was “tuned absorber” instead of “damper”. A damper converts movement to heat, while a tuned absorber temporarily stores energy,File Size: KB.

Three different types of NES absorbers are coupled to the drivetrain model and their effect in reducing the amplitude of torsional vibrations is quantified using two criteria. The first criterion is the area of effective acceleration amplitude reduction, which indirectly quantifies the overall vibration by: Aiming at the limitation problem of constant dynamic parameters for classical vibration absorber, a new cantilever beam-type absorber device is designed which is composed of a continuous beam and mass block, a vibration isolation system model with a beam-type absorber is established, the absorption frequency of the mass block at different positions is : Jun Zhao, Chao Yang Ma.

The power dissipation in the torsional vibration damper is a part of the total mechanical losses in the drive unit. Careful selection of an appropriate type of torsional damper can yield a comparable reduction of mechanical losses, as mentioned above in the most Author: Vaclav Píštěk, Mykola Gorbunov, Pavel Kučera, Olena Nozhenko.

Torsional rotor vibrations are undesirable phenomena which are very difficult to control in rotating systems. A common method for reducing vibrations involves the use of dynamic absorbers. However, if their physical parameters are constant, the frequency range of efficiency of dynamic absorbers is tight, making them unsuitable for systems with variable by: Titurus, Marsico & Wagg Torsional Vibration Absorber UoB/, v Page 3 of 10 3 Theory Background information This section of the lab notes provides derivation of the basic equations that are used to introduce theFile Size: KB.

This paper proposes an innovative solution to suppress torsional vibrations in any rotating machinery with a variable frequency of excitation, or a variable natural frequency. The adaptive torsional tuned vibration absorber (ATTVA) was designed using an integrated electromagnetic circuit, which can adapt its natural frequency to match the varying natural frequency of any Multi Degree of Author: Taher Abu Seer, Nader Vahdati, Oleg Shiryayev.

This paper presents results from tests completed on a rotor system fitted with pendulum-type centrifugal torsional vibration absorbers. A review of the associated theoretical background is also given and the experimental and theoretical results are compared andcontrasted.

An overview of the test apparatus is provided and itsunique features are discussed. Approximate formulae for the decay rate far from the tuning frequency 17 Approximate formulae for the decay rate in the blocked zone 18 Bandwidth of absorber 19 6. Multiple tuning frequencies 22 7.

Absorber applied to beam on elastic foundation 24 8. Two-layer foundation viewed as an absorber 28 9. A vibration model of the powertrain can be used to predict its dynamic behavior when excited by fluctuations in the engine torque and speed.

The torsional vibration resulting from torque and speed fluctuations increases the rattle noise in the gearbox and it should be controlled or minimized in order to gain acceptance by clients and by: 3. Principles of Vibration Control 4, views Extreme Dangerous Biggest Heavy Duty Hammer Forging Factory, Hydraulic Steel Forging Process - Duration:.

The analytical results derived also provide a quantitative means of predicting synchronous absorber response amplitudes and the associated rotor torsional vibration levels, as well as the stability properties of these responses, results are very useful for the design of absorber by: In contrast, the present experimental study is, to the authors’ knowledge, the first systematic exploration of a design space for pendulum absorbers.

Specifically, it is the first study in which one can adjust the relative tuning of the absorber to the applied .This article presents the potential of computational modelling during the development of an unconventional crank train. The computational model is assembled as well as numerically solved in a Multi-Body System incorporating the modally reduced bodies and hydrodynamic bearings.

Regarding the simulation results, the attention is paid to the torsional vibration and its analysis, including concept Cited by: 1.