Duration: 7 minutes
Video: Defining the output and model settings for simulations
Step-by-step instructions
1. Open the Demo_a project (if not open)
In Bladed, File > Open > demo_a.prj (this project is located within the Bladed application folder, e.g. C:\DNV\Bladed 4.18\DemoModels\Demo_a\demo_a.prj).
2. View the Calculation Output options
Click Calculation Outputs... near the bottom of the Calculation window.
3. Define Blade outputs
In the Blade outputs tab, select All blades from the dropdown for Loads (Principal axes).
4. Define the Tower output
In the Tower outputs tab, Click Select Output Stations and then enable other Tower stations as load outputs by clicking in the table cells in the column Tower loads? e.g. Tower station number 3. Click OK to return to previous window.
Enable Tower deflections by checking the relevant box.
5. Save settings by clicking OK
6. Define integrator settings
Click Calculation Parameters... to open the window. Then click Edit Integrator settings. Select an integrator to use from the dropdown.
7. Define Flexibility model settings
Click the Flexibility button in the main navigation window.
Here you can set the number of modes for the blades and tower, as well as the dampening ratio. You can also define multi-part blades (view the user and theory manual to learn more). In the video we use default settings.
8. Define Aerodynamics model settings
Click Specify dropdown menu (next to File) in the main navigation window, and select Aerodynamics Control. In the video we use the default settings.
9. Define the control system
Click the Control button in the main navigation window.
Here you can define the Torque and Pitch loops to define the behaviour of the controller. In the video we use the default settings, but you can also specify a more realistic controller by using Define External Controller (DLL file).
Key learnings
- Before running any simulation, it is important to make sure you check the loads and the locations you want to save the outputs by looking at the Calculation Outputs window.
- The Calculation Parameters window give access to different numerical parameters controlling the progress of a Bladed simulation
- Access the Flexibility window to change the number of vibration modes used to represent the flexibility of the structure and the Aerodynamics window to toggle the parameters on the engineering models selected.
- Check the Control module to define the PID gains for the embedded (or “internal”) controller or to add the path to your DLL file modelling the external controller.
Knowledge check
Question 1
Fill in the blanks:
If I want to edit the air density input in Bladed for the simulation, I have to look at the _______ ______ tab.
Answer
Physical constants
Question 2
Fill in the blanks:
There is also the possibility of changing the rotor azimuthal position at the start of the simulation under the _______ ______ tab.
Answer
Initial conditions