Jupyter notebook seems stuck at trigsymp()

[Nuno]

I have created a jupyter notebook where I'm defining a multibody system in order to obtain its kinematics and dynamics.

 I use the KanesMethod (from sympy) in order to obtain the equations of motion of the system.

However when I try to use trigsimp() on the mass matrix obtained, it seems to get stuck there forever (displaying an 'In[*]' next to that line).

The line is: 'mass_matrix = trigsimp(kane.mass_matrix)'

Here's a screenshot:https://gyazo.com/8c6ac6cefd87b889a4ed8f9a9c3077d9

(The python process is using ~30% of the processor)

The matrix is a 6x6 matrix, but some of the elements have lot's of trignometric functions since there are 3 reference frames with 3D rotations in order to each other.

So what's happening? I have no experience with sympy, so I'm a little lost.

(I'm sorry if this is a duplicate, but I couldn't find my first publish and I wanted to add more info)

[Jason Moore]

Nuno,

Simplification of very large expressions is typically not a good idea due to the time needed for computation. Unless you have a specific need to simplify the resulting equations, I'd avoid it.

Jason
moorepants.info
+01 530-601-9791

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[Nuno]

Ok, thanks so much for answering.