Fig. 4 - Horizontal direction impulse response WITHOUT damping. Same setup as Fig. 3 but with horiz damper screw removed from fluid. Again at about 3.9 div/cycle the horiz fn = 4.4 Hz. Clearly the relative impulse amplitude is not falling out quite as fast as in Fig. 3 but the natural frequency is not detectably different. (not unusual for damping ratios in the well underdamped region)
Fig. 4 - Horizontal direction impulse response WITHOUT damping. Same setup as Fig. 3 but with horiz damper screw removed from fluid. Again at about 3.9 div/cycle the horiz fn = 4.4 Hz. Clearly the relative impulse amplitude is not falling out quite as fast as in Fig. 3 but the natural frequency is not detectably different. (not unusual for damping ratios in the well underdamped region)
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