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STRUCTURAL DYNAMICS ASPECTS OF THE MANNED LUNAR SPACE-VEHICLE LAUNCH-PHASE
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Abstract
The various sources of loads of importance in the design of launch vehicles are discussed generally. The natural vibration modes, which are an essential ingredient in all loads problems, are described for the Saturn vehicle as obtained from a structural replica model. The effects of fuel loading on the structural modes are considered and the results obtained on the model are compared with full-scale results. Launch-vehicle buffeting is discussed and the buffeting characteristics of a manned lunar vehicle configuration are described. Some evaluations of buffeting scaling laws obtained with this configuration are presented. Estimates of the acoustic environment on the spacecraft associated with engine noise at lift-off and with aerodynamic noise due to buffeting are shown. The steady and vibratory loads due to ground winds as determined from wind-tunnel tests of a Saturn model are presented. The flight loads due to winds, wind shear, and gusts are discussed and some results of calculations made using winds defined from smoke-trail techniques are shown.
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Citation
Gerald, R. and Runyan, H., "STRUCTURAL DYNAMICS ASPECTS OF THE MANNED LUNAR SPACE-VEHICLE LAUNCH-PHASE," SAE Technical Paper 620491, 1962, https://doi.org/10.4271/620491.Also In
References
- Vreuls Frederick E. Jr. The S-I Stage. Astronautics 7 2 February 1962
- Mixson John S. Catherine John J. Investigation of Vibration Characteristics of a l/5-Scale Model of Saturn SA-1. 30th Symposium on Shock, Vibration and Associated Environments Detroit, Michigan October 10 12 1961
- Liepmann Hans W. Parameters for Use in Buffeting Flight Tests. Douglas Report No. SM-14631 January 3 1953
- Henry Robert M. Brandon George W. Tolefson Harold B. Lanford Wade E. The Smoke-Trail Method for Obtaining Detailed Measurements of the Vertical Wind Profile for Application to Missile-Dynamic-Response Problems. NASA TN D-976 1961