Table 7. Natural frequencies measured in LLSS of second vibration test

X Y Z
Main mode Initial 239.00 119.78 179.31
Sine burst 240.33 120.45 177.34
Random 228.67 124.51 158.78
Shift (%) 10.33 (4.3) 4.73 (3.9) 20.53 (11.45)