Instabilities when modeling a canopy supported by tensile cables

[Anonymous]

I'm trying to model a Canopy supported by tensile cables from the top and bottom. However, I'm getting a lot of instability warnings and unreasonable displacement values. Please find the model attached.

[Krzysztof_Wasik · Accepted solution]

Hi @Anonymous 

I have corrected your file by

Increasing top cable shortening to -0,02 relative

Changing parameters of non linear analysis by switching on Large displacements  and switching on matrix update after each iteration

 Instability type 3 is still reported but it can be neglected while calculation converges.

Attached you will find corrected file

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