Plotting eigenmodes in 3D
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Hi!
I have a code that calculates eigenfrequencies for a frame structure thruogh the "eig"-command. I have the stiffness and massmatrix as input and get the eigenvalues and eigenvectors as output. What I want to do is to plot a 3D-plot of the eigenmodes of the structure. I want to see which frequency that corresponds to bending, torsion ...
I have not found any good ways to plot the eigenvector in 3D, any advise?
Thank you!
1 件のコメント
Van Tien Nguyen
2021 年 10 月 9 日
Hi, I am looking for a code to solve eigenvalue problem for 3D frame building. Can you exchange your code? Thank you in advance.
回答 (3 件)
Christine Tobler
2019 年 5 月 9 日
4 件のコメント
Christine Tobler
2019 年 5 月 13 日
I'm still a bit confused: the third column of node seems to be all zero, so is this really a 2D problem? That would be much simpler to plot.
Also, the element matrix seems to contain only two nodes, so is each element simply a line? I would have expected a triangle / rectangle / tetrahedron / ... for a 3D problem.
Anyway, here are some functions that may be helpful to visualize PDe solutions in MATLAB: trisurf, tetramesh, pdeplot, pdeplot3d (particularly the nodes, elements syntax).
jice zeng
2019 年 6 月 21 日
Hi,do you figure out your problem? I also have a 3D frame structure to be analyzed for its dynamic properties, such as frequency and mode shape, I have trouble in plotting 3d mode shape, so can you share your idea to plot mode shape with me?
1 件のコメント
Ravi Kumar
2019 年 6 月 21 日
Check this example in PDE Toolbox:
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