- #1
Mohammad Halawa
- 5
- 1
- TL;DR Summary
- The system is a 4 springs and 1 mass on a vibrating base, the system has a low natural frequencies (the mode shapes are: 4, 4.2, 5, 5.5, 8, 11, 11.2 Hz). When excited with a random vibration like in the attached PSD curve below.