Experimental and Computational Modal Analyses for Launch Vehicle Models considering Liquid Propellant and Flange Joints

Table 3

Specifications of test equipment.

(a) Accelerometer (PCB 352C42)

Sensitivity	10.2 mV/m/s^2
Broadband resolution (1 to 10,000 Hz)	±491 m/s^2 pk
Frequency range (±5%)	0.005 m/s^2 rms
Weight	1 to 9000 Hz
Height, hex	2.8 g

(b) Impact hammer (PCB 086C03)

Sensitivity	2.28 mV/N
Measurement range	±2224 N pk
Resonant frequency	22 kHz
Excitation voltage	20 to 30 VDC
Hammer mass	0.16 kg
Tip type	Steel

(c) NI PXI (NI-4472)

Number of analog inputs	8
Resolution	24 bits
Sampling rate	102.4 kS/s
Input range	±10 V
Dynamic range	110 dB