Base Comparison

All designs are modeled at Iron (Class 40 Cast) (7300 Kg/m^3)

1) Solid Block

Non-Solid Vibration Modes: 7^th at 115 Hz, 8^th at 165 Hz

Weight: 1901 Kg

Notes: 4 inches thick

2) Open Pockets

Non-Solid Vibration Modes: 7^th at 79 Hz, 8^th at 129 Hz

Weight: 1303 Kg

Notes: 4 inches thick, with open face pockets on the backsides and bottom

3) Box Coring

Non-Solid Vibration Modes: 7^th at 158 Hz, 8th, 9th, and 10^th modes are modeled isolation pads used to constrain the structure in the FEA. This modes are at 192 Hz

Weight: 1432 Kg

Notes: 4 inches thick, with rectangular cutout in the base