Hi all, I am new to Julia (coming from Python).
I need some help with defining equations and extracting Mass, Stiffness and Damping Matrices. Does anyone have some advice to generate these matrices using the following equation, for example:
Welcome to the community!
Some questions and remarks:
Hi, and thank you!
That is correct, it is a term, the “right hand side” of the equation is the applied force. The term posted contains the description of a railway track and sub elements beneath it (such as sleepers ballasts and the sub-grade). It is in a 2 dimensional state at the moment, but I plan to extend to 3D soon.
Cpi and Kpi are constants that describe the rail pad stiffness and damping, whereas x is a float variable that describes location along the x-axis. q and Zsi are generalized coordinates and as such are in a single vector where the first K elements are q’s and next N elements are Zs.
Elements that have a coefficient that are a second derivative of the coordinate vector go to the mass matrix, elements that have a coefficient that are a first derivative of the coordinate vector go the damping matrix and elements that are a coefficient of the coordinate vector go to the stiffness matrix.
You said you come from Python: Did you try to implement this in Python?
If you would post a code snippet, I guess much more people would be willing to help.
Otherwise your question is still very unclear and it is unlikely that people can help.
Hi again,
I did implement in Python and have done so again in Julia by using for loops - not to worry, it produces the same result as the Python script. Will update when I find a quicker method.
