Question: Consider a design problem and solve it for this question, Shaft is (Steel), Find Factor of safety, Endurance limit, and number of cycles for the

Consider a design problem and solve it for this question, Shaft is (Steel), Find Factor of safety, Endurance limit, and number of cycles for the whole supporting structure.

17 A three-bladed wind turbine (Fig. 3.40(a)) has a small unbalanced mass m located at a radius r in the plane of the blades. The blades are located from the central vertical (y) axis at a distance R and rotate at an angular velocity of . If the supporting truss can be modeled as a hollow steel shaft of outer diameter 0.1m and inner diameter 0.08m, determine the maximum stresses developed at the base of the support (point A ). The mass moment of inertia of the turbine system about the vertical (y) axis is J0. Assume R=0.5m,m=0.1kg,r=0.1m, J0=100kgm2,h=8m, and =31.416rad/s. PROBLEMS 339

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