Validation of Vibration Isolation System Modeling Capabilities of the VVES and VIMGEN Codes

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Authors
  1. Jiang, L.
  2. Polak, M.F.
Corporate Authors
Defence R&D Canada - Atlantic, Dartmouth NS (CAN);MARTEC Ltd, Halifax NS (CAN)
Abstract
This report describes a recent validation of the VVES/VIMGEN system through direct comparison of the numerical predictions and experimental measurement of free-free dynamics of three small-scale vibration isolator models, including two single-stage vibration isolators and one two-stage vibration isolator, which were composed of two or three steel plates and one to eight rubber elements. The modal properties compared included natural frequencies, mode shapes and modal loss factors. The measured and predicted acceleration frequency responses at various locations of the vibration isolator models under different loading conditions were also compared. Reasonably good agreement between the experimental and numerical results was observed. The differences between these results are identified and the possible causes are discussed. Also described in this report are some recent improvements of the VIMGEN GUI system. These include (1) provision of choices to enter/view the coordinates of the attachment points in either the local or global coordinate systems; (2) inclusion of the VVES MATLAB script routines in the installation package; and (3) enhancement of the animation capability for beam elements. In addition, some bugs identified in the previous version of VIMGEN were corrected. All these new improvements were extensively tested and the new version of VIMGEN code has been included in the updated installation package.

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Keywords
diesel engine vibration;resilient suspension;model experiment;VIMGEN (Vibration Isolation System Model Generation and Visualization Code);Vibration isolation;Viscoelasticity
Report Number
DRDC-ATLANTIC-CR-2005-072 — Contractor Report
Date of publication
01 Nov 2005
Number of Pages
130
DSTKIM No
CA027163
CANDIS No
525203
Format(s):
CD ROM

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