Supplementary Material, Appendix G – G.19

APPENDIX G – Pumps and Turbines

Main – Previous – Next

Surge Analysis and the Wave Plan Method

Supplementary Material: Example Problems and Solutions

Appendix G – Problem 19

G.19 Compute the weight moment of inertia WR² of the object described in the previous example (with respect to z-axis) if the alternate blocks of lightweight material are removed from the assembly (or replaced with ultra-lightweight material of negligible density, such as Styrofoam).

Solution:

I_zw = I_{zw(CompositeClinder)} + I_zw(plate)

            I_zw = W_{CompositeClinder} * (1/2) (r₂² + r₁²)  + W_plate * (1/2) (r²) 

            Density of the composite cylinder = 0.5*(7800+0) = 3900 kg/m³

W_{CompositeClinder} = 1712.767 N,

W_plate = 2596.195 N, r­₁ = 0.5m, r­₂ = 0.45m, r­ = 0.6m

I_zw = 854.829 N-m²

---

Summary of revisions to this page:

Date/Revision