Vibroacoustic studies on sounding rocket bulkheads

Jeffrey L. Comrie; Umesh A. Korde

doi:10.1117/12.914753

27 March 2012 Vibroacoustic studies on sounding rocket bulkheads

Jeffrey L. Comrie, Umesh A. Korde

Proceedings Volume 8341, Active and Passive Smart Structures and Integrated Systems 2012; 834117 (2012) https://doi.org/10.1117/12.914753
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2012, San Diego, California, United States

Abstract

The natural frequency coupling of 2 components of a sounding rocket system is studied, the forward bulkhead (commonly referred to as the "bulkhead" or "BH") and the payload cavity within the fairing. The bulkhead was modeled as a thin, flat, circular plate with a clamped boundary condition. The payload cavity was modeled as a column of air with closed ends contained by the rocket fairing. Both components were studied individually, and added together to obtain a coupled effect. The components were studied in terms of theoretical calculations and understanding, while testing the theory against experiments conducted in the laboratory. When appreciable differences between theory and experimental results were within reason for the individual components, the coupled system was tested. This methodology enabled a "piecewise" approach to studying and acquiring natural frequency shifting of the sounding rocket model through coupling. Experimental work for frequency tuning of the bulkhead through internal pressure modulation is presented. Guidelines for improvement of the vibroacoustic response through structural redesign and frequency tuning of sounding rockets are detailed.

Citation Download Citation

Jeffrey L. Comrie and Umesh A. Korde "Vibroacoustic studies on sounding rocket bulkheads", Proc. SPIE 8341, Active and Passive Smart Structures and Integrated Systems 2012, 834117 (27 March 2012); https://doi.org/10.1117/12.914753

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