System Level Design And Analysis Of Truss Structures Damped By Viscous Struts
Report Number: WL-TR-91-3078 Volume III, p. GCC-1 thru GCC-14
Author(s): Yui, Y. C.
Corporate Author(s): Lockheed Missiles & Space Company
Date of Publication: 1991-08
Pages: 14
DoD Task:
Identifier: This paper is part of a conference proceedings. See ADA241313
Abstract:
A procedure is presented to design passive damping into large truss structures using viscously damped struts to enhance vibration attenuation or stability of controls system. A method is derived from the equations of motion using Rayleigh-Ritz method to relate the approximate contributions of a viscously damped strut to the system level modal damping ratios and frequencies. Strut placement locations, the total number of struts required · and the damping characteristics of struts can be easily identified and calculated. The procedure consists of three steps: 1) extract structural characteristics from the undamped baseline finite element model, 2) on a mode by mode basis, perform damping design using the derived equations to meet system level requirements and 3) update finite element model to include damping mechanism and perform verification analysis using complex eigensolution.
Author(s): Yui, Y. C.
Corporate Author(s): Lockheed Missiles & Space Company
Date of Publication: 1991-08
Pages: 14
DoD Task:
Identifier: This paper is part of a conference proceedings. See ADA241313
Abstract:
A procedure is presented to design passive damping into large truss structures using viscously damped struts to enhance vibration attenuation or stability of controls system. A method is derived from the equations of motion using Rayleigh-Ritz method to relate the approximate contributions of a viscously damped strut to the system level modal damping ratios and frequencies. Strut placement locations, the total number of struts required · and the damping characteristics of struts can be easily identified and calculated. The procedure consists of three steps: 1) extract structural characteristics from the undamped baseline finite element model, 2) on a mode by mode basis, perform damping design using the derived equations to meet system level requirements and 3) update finite element model to include damping mechanism and perform verification analysis using complex eigensolution.
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Via the Defense Technical Information Center (DTIC): Identifier: This paper is part of a conference proceedings. Access a record for the conference proceedings, and possibly a pdf download of the report, at DTIC Via National Technical Report Library: This report may be available for download from NTRL. Use the Title from this record to locate the item in DTIC Online Indications of Public Availability No digital image of an index entry indicating public availability is currently available There has been no verification of an indication of public availability from an inside cover statementRelated report(s)
This report is part of the following conference:
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Proceedings of Damping '91: 13-15 February 1991 San Diego, California (GCA-1 through JCB-17)
WL-TR-91-3078 Volume III