Hybrid component mode synthesis based on test derived data

✍ Scribed by J.L. Humar; Y. Soucy

• Publisher: Elsevier Science
• Year: 1998
• Tongue: English
• Weight: 479 KB
• Volume: 67
• Category: Article
• ISSN: 0045-7949
• DOI: 10.1016/s0045-7949(98)00059-5

✦ Synopsis

A method of component mode synthesis in which a majority of the dynamic characteristics of individual components are determined by modal testing is described. For the purpose of testing, the component can be supported on a suitable number of rigid supports. Alternatively, the test can be carried out in a free±free con®guration, in which very ¯exible cables are used to hold the component. In either case, a number of practical diculties arise. A new approach to modal testing in which the ®xed±®xed modes of the component are obtained from a test con®guration in which the component is held by supports of arbitrary characteristics is described. A complete theoretical formulation is developed. Computer simulation studies are carried out to determine the sensitivity of the calculated mode shapes and frequencies of the assembled structure to the various measurement errors in modal testing. Some results from these studies are presented.