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Pre-Analysis & Start-Up
Pre-Analysis
Root Radial Force
The radial force is the outward force that comes from a spinning mass. It is equal and opposite to the reaction force at the root of the blade that keeps the blade connected to the hub. It can also be thought of as the mass times the radial acceleration.
You might remember from your Dynamics course that radial acceleration is equal to,
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$$a_r=\ddot
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-r {\dot{\theta}}^2$$ .
Here,
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is 0 because the radius is constant (i.e the blade is fixed in the radial direction)$$\ddot
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$$
The radial force is simply equal to,
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$$F_r = m a_r$$
Substituting the radial acceleration and expressing angular velocity as
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we get:$\omega$
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2. Simple Bending Moment Calculation$$F_r = m r \omega^2$$
- Compare drag coefficient
Under Construction
Start-Up
Please follow along to start Part 2 of this project! We will start by defining the material for the blade.
Summary of steps in the above video:
- Drag and drop a static structural analysis system in the project schematic. Name it FEA.
- Material Properties Set-Up
- Go in Engineering Data
- Add a new material and name it homogenized_orthotropic
- In the left toolbox, under physical properties, double-click on density and enter 1550 kg/m^3
- Expand Linear Elastic and double-click on Orthotropic Elasticity (click the plus sign)
- Enter the material properties given from the problem statement.