Deflection And Flywheel Analysis
Stresses Analysis of a Flywheel A classical approach to find out Deflection and Stresses in flywheel consist of following steps:
Making a 3-D Model of Flywheel:
First, we must make a model of Flywheel using Design software’s like CAD . and transfer it to ANSYS.
Geometric Description:
Now we have to describe the parameters: Outer-diameter (Do) Number of Spokes (N) Diameter of Spokes (d) Density (ρ) Speed (s)
Stresses in Rimmed flywheel:
A Rimmed flywheel consist of: Rim in which mass of the flywheel is concentrated. Hub for mounting Flywheel on the shaft. No. of arm supporting the rim.
It is experimentally found that maximum stress acting on flywheel is acting on its rim.
Design Equation we obtain from book is σrim=ρv^2 [0.75+(0.25π^2
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After that all elements equation are combined to get a global system of equation to get a final answer in Numerical form. Workbench problem:
To check % error between values obtained using standard equation and ANSYS Workbench a benchwork problem is solved.
Now, consider a flywheel of ρ = Mass density of steel = 7850 kg/m3
V = linear rim speed at mean radius
V=Rw*ω
ω = Angular speed of Flywheel = 600 rpm
Rw = Mean radius of Rim n = No. of arms = 3 t = Thickness of Rim
Do = Outer Diameter = 200 mm
Above data is used to get value of principal stress by using equation and ANSYS workbench.
Principal stress calculates through ANSYS Benchmark = 2.98e8 Pa
By putting above data in equation in (1)
Principal stresses through Design Equation = 3.004e8 Pa
% error is 1 % which is negligible. Results:
To analyze the effect of one parameter with respect to other parameter on stress induced, we take two parameters varying and all others parameter kept
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