P12464: Hydrofoil River Power System
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Analytical Analysis

Analytical Analysis

Three loading cases analyzed:
Case 1: minor peak at flip near start of stroke, 24.5 degrees
Case 2: major peak mid-stroke, 29.1 degrees
Case 3: minor peak at flip near end of stroke, 65.0 degrees
Load Cases

Load Cases

Stress

Analyzed for each case, considering the base end of the boom to be a fixed support. Loads and moments considered on all three axes. Stress components in all directions determined. vonMises failure criterion used, all cases passed
vonMises Stress Formula

vonMises Stress Formula

Life Calculations

Relate cyclic loading to yield and ultimate strength. To analyze effects of multiple loads determined mean and alternating vonMises Stresses. Endurance limit determined through Marin factors and compared to stresses using Goodman, Soderberg, Gerber, and Yield Line fatigue theory.
Factors of Safety above Infinite Life

Factors of Safety above Infinite Life


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