MODELLING THE VIBRATION BEHAVIOUR OF INFINITE STRUCTURES BY FEM

✍ Scribed by C. WANG; J.C.S. LAI

• Book ID: 102610113
• Publisher: Elsevier Science
• Year: 2000
• Tongue: English
• Weight: 207 KB
• Volume: 229
• Category: Article
• ISSN: 0022-460X
• DOI: 10.1006/jsvi.1999.2506

✦ Synopsis

In vibration power #ow analysis, often the vibration behaviour of in"nite structures is required. The modelling of in"nite structures using the "nite element method has been discussed. By considering the impedance of a "nite beam and "nite plate, theoretical formulae for a spring}damper combination to match these impedances are derived. Examples are given for a rather short (200 mm) beam and a small (400 mm diameter) plate with spring}dampers applied to the edges of the structures using the "nite element method. Results of the driving point mobility indicate that these "nite structures simulate an in"nite beam and an in"nite plate very well. Furthermore, the surface mobility of an in"nite plate over a square contact area subject to a uniform conphase force excitation has been calculated successfully using just under 8 times fewer elements than a previous study.