Active periodic struts for gearbox support system

Saeed Asiri; Amr M. Baz; Darryll J. Pines

doi:10.1117/12.540675

29 July 2004 Active periodic struts for gearbox support system

Saeed Asiri, Amr M. Baz, Darryll J. Pines

Proceedings Volume 5386, Smart Structures and Materials 2004: Damping and Isolation; (2004) https://doi.org/10.1117/12.540675
Event: Smart Structures and Materials, 2004, San Diego, CA, United States

Abstract

Active periodic structures exhibit unique dynamic characteristics that make them act as tunable mechanical filters for wave propagation. As a result, waves can propagate along the periodic structures only within specific frequency bands called the “Pass Bands” and wave propagation is completely blocked within other frequency bands called the “Stop Bands”. The spectral width of these bands can be tuned according to the nature of the external excitation. In this paper, the emphasis is placed on developing a new class of these periodic structures called Active Periodic Struts (APS) which can be used to support gearbox systems on the airframes of helicopters. When designed properly, the APS can stop the propagation of vibration from the gearbox to the airframe within critical frequency bands and consequently minimizing the effects of transmission of undesirable vibration and sound radiation to the helicopter cabin. The theory governing the operation of this class of Active Periodic Struts (APS) is presented and their tunable filtering characteristics are demonstrated experimentally as function of their design parameters. The presented concept of the APS can be easily employed in many applications to control the wave propagation and the force transmission both in the spectral and spatial domains in an attempt to stop/confine the propagation of undesirable disturbances.

Citation Download Citation

Saeed Asiri, Amr M. Baz, and Darryll J. Pines "Active periodic struts for gearbox support system", Proc. SPIE 5386, Smart Structures and Materials 2004: Damping and Isolation, (29 July 2004); https://doi.org/10.1117/12.540675

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available