The steps for a transient analysis are:
- Create a load case "fluid hammer dynamic"
- Select the file with the fluid hammer loads (see the post above)
- Assign the fluid hammer loads to the points
- run the calculation
- look at the results (video)
- evaluate stresses
The first two points are discussed above. Lets assumme your fluid dynamic load case is called "hammer".
In the transient load case "hammer" that you created goto "Loads-> Fluid hammer concentrated loads
Then select the node where you want to add a transient load.
In the window "Fluid hammer concentrated load" there is a selection box "QXi" (means dynamic load in local coordinates: local X direction means axial to the pipe) you can find the list of load names that you inserted as title line in your force file over time.
You may specify a factor which allows to scale the loads. (e.g. -1 or +1 to change the sign)
Step 4: Launch calculation
Step 5: When you select the load case "hammer" in the result view, ROHR2 will convert all the load steps into deformation images to create a "video".
Click on the play button to see the deformation video over time:
You can stop the video at any time or go back an forward with the direction buttons in the same way as on a video player.
At any time step you can have a look at all results, exactly the same way as you would do for a simple static load case.
You can also use the button "Show time-dependant results" in the Node result window to launch ROHR2FUN to display a single result over time.
If you have your stress analysis set on automatic equations, ROHR2 will automatically create a stress equation for occasional loads using the maximum bending moments of the whole time series (usually called hammer-MMi). You can check under LC->Stress Analysis->Equations.
Hope this helps as a first introduction.
Sie haben keine ausreichende Berechtigung, um die Dateianhänge dieses Beitrags anzusehen.