Analysis on Vibroacoustic Fatigue Life of Empennage in a Hypersonic Vehicle

Table 7

Sound fatigue life at different sound pressure levels.

Increase or decrease the value	Damage index	Sound fatigue life
−15	−6.22
−10	−5.41
−5	−4.51
0	−3.26
+5	−2.45
+10	−1.51
+15	−0.33