Force Limited Vibration is a technique that reduces the severity of over-tests during vibration testing by limiting the acceleration input based on the maximum expected in-service interface force. In this paper, the sources of over testing are reviewed and a new method called the Apparent Mass method for deriving the maximum in-service interface force is presented. In this method, the maximum in-service interface force over a given bandwidth is predicted using the full three dimensional linear-elastic theory supplemented by the necessary conditions for a representative vibration test, the assumption that the test article and its in-service mounting structure are lightly damped, and that the in-service forces exciting the mounting structure are broadband. The resulting equation is shown by numerical example to produce significant notching without producing an under-test situation, even for extremely light test articles.
CITATION STYLE
Marchand, P., Singhal, R., & O’Grady, M. (2016). Force limited vibration using the apparent mass method. In Conference Proceedings of the Society for Experimental Mechanics Series (Vol. 9, pp. 53–66). Springer New York LLC. https://doi.org/10.1007/978-3-319-30087-0_6
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