self weight
Moderator: bernd
Forum rules
and Helpful information for the FEM forum
and Helpful information for the FEM forum
self weight
see topic viewtopic.php?f=3&t=16655
I could not resist:
https://github.com/berndhahnebach/FreeC ... selfweight
We just need an icon for it! Any help is appreciated!
I could not resist:
https://github.com/berndhahnebach/FreeC ... selfweight
We just need an icon for it! Any help is appreciated!
Re: self weight
I haven't tested your branch yet, I will soon. Is the constraint gravity specific? Being able to specify the direction vector immediately generalizes the constraint to acceleration.bernd wrote:I could not resist:
"fight the good fight"
Re: self weight
Slightly improved
I may be wrong but I think it's a bouncy constraint
Code: Select all
+ f.write('Eall,GRAV,9810,0,0,1\n')
"fight the good fight"
Re: self weight
I think the user need to be able to specify in which direction gravity is, even if it only allows the 3 axis x,y,z
Re: self weight
What do you mean by bouncy?sgrogan wrote: I may be wrong but I think it's a bouncy constraintCode: Select all
+ f.write('Eall,GRAV,9810,0,0,1\n')
The current version only applies self weight in z-direction and only for the earth. But this could be changed in the input file easely. If it is a needed feature we could change the constraint in this regard later if someone needs it.sgrogan wrote:Is the constraint gravity specific? Being able to specify the direction vector immediately generalizes the constraint to acceleration.
I like the green one.
Re: self weight
If the direction and the vector could be changed by the user we would need a nice task panel to change all this. I do not need it. I'm structural engineer. All my buildings have self weight in z-direction and the NASA is not one of our customer. Means we only have buildings on the earth. If someone needs it he could do the implementation. As stated, this could be easely changed in the input file and could be easily added later on.makkemal wrote:I think the user need to be able to specify in which direction gravity is, even if it only allows the 3 axis x,y,z
Re: self weight
YEAH it is jumping up !!!sgrogan wrote:I may be wrong but I think it's a bouncy constraintCode: Select all
+ f.write('Eall,GRAV,9810,0,0,1\n')
Re: self weight
updated https://github.com/berndhahnebach/FreeC ... selfweight
A few other minor changes I have been collecting over the last few days are included as well. Thanks sgrogan for the icon and the jumping info. From my point of view a PullRequest could be made. But I'm waiting of sgrogan to report back.
results for FEM examples:
2D --> 2.29491 mm
3D --> 2.24684 mm
cheers bernd
A few other minor changes I have been collecting over the last few days are included as well. Thanks sgrogan for the icon and the jumping info. From my point of view a PullRequest could be made. But I'm waiting of sgrogan to report back.
results for FEM examples:
2D --> 2.29491 mm
3D --> 2.24684 mm
cheers bernd
Re: self weight
On assembly level you're right. at least as long users don't have other directions preferred… for instance the y direction.bernd wrote:If the direction and the vector could be changed by the user we would need a nice task panel to change all this. I do not need it. I'm structural engineer. All my buildings have self weight in z-direction and the NASA is not one of our customer. Means we only have buildings on the earth. If someone needs it he could do the implementation. As stated, this could be easely changed in the input file and could be easily added later on.makkemal wrote:I think the user need to be able to specify in which direction gravity is, even if it only allows the 3 axis x,y,z
and second reason i like to see a direction setting is that on component/part level this goes sometimes wrong. that working directory is not same as building direction… a beam on an angle
Re: self weight
I meant Buoyancybernd wrote:] YEAH it is jumping up !!!
Changing the vector and the acceleration by editing the file is fine for now.
The use case I have in mind is using this in combination with the results of a frequency analysis using Miles Equation to calculate "equivalent" static loads due to random vibration.
I think a pull request would be great. Thanks for this
"fight the good fight"