A fuel-filled propellant tank was subjected to a single shaker random excitation in the frequency range of 10to 380 Hz. Due to the schedule and practical limitations the only information available on the input excitation was the shaker acceleration. Because of this limitation, transfer functions had to be developed from acceleration ratio. Due to the coupling effects of the liquid and the test fixture to the shake table, the input frequency spectrum was not flat over the frequency range of the test. This created a number of large non-modal peaks which needed more careful curvefitting strategy to identify the real modes.
Modal test of a propellant tank
Modaluntersuchung eines Treibstofftanks
Proc. of the 4th Int. Modal Analysis Conf., Union College-Schenectady ; 1 , Feb ; 21-23
1986
3 Seiten, 4 Bilder, 1 Tabelle
Conference paper
English
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