Modeling Flexible Bodies in SimMechanics

Technical paper and examples on modeling flexibility in SimMechanics.

Description

This archive contains a technical paper on modeling flexible bodies using SimMechanics and Simulink. The archive also includes the examples discussed in the technical paper.

An overview of the techniques described here is presented in the following MATLAB Digest article:

http://www.mathworks.com/company/newsletters/digest/2006/may/simmechanics.html

Acknowledgements

Modeling Flexible Bodies In Sim Mechanics inspired this file.

This file inspired Modeling Flexible Bodies In Sim Mechanics.

• Required Products: SimMechanics; Simulink
• MATLAB release: MATLAB 7.2 (R2006a)

[Jos Boeije]

Question: I have a working implementation of flexbodies in Simmechanics. For this I used a classic, free-free state-space model, exported from Ansys. To get the results to closely match FEM output however, I require about 200 modes, which takes a long time to run. In trying to improve this, I have been looking at different techniques to create state-space systems, e.g. the free Craig-Bampton reduction approach. Does anyone have experience with this, or other advice relevant to improve calculation times and/or accuracy?

[Etienne]

Hi there. I am trying to construct a composite beam by copying the given beam model, and then connecting the midpoint. I cannot figure out how to do this. Do you maybe have examples of where you have connected several flexible bodies?

[Javier]

When I try to model a beam along certain directions some plot errors occur. For example when I try to plot a beam which "Direction of the beam element" is [1 1 0], Matlab answers: MATLAB error message: Error using ==> axis>LocSetLimits at 234
Vector must have 4, 6, or 8 elements.

[Ahmed Sohail]

 

[surykant jamadade]

i am give the refrance only for my tutorial

[surykant jamadade]

 

[Samare Mostafavi]

 

[Paolo Tregambe]

there is a problem with:
"??? Error using ==> cd
Cannot CD to /home/vchudnov/Playground/SimMechanics/FlexibleBodies/Paper/MLNN2006Q1/CaseStudy/paper/data (Name is nonexistent or not a directory)."
Sicerely

[VIVEK RATHI]

 

[Raffaele Iervolino]

There are many problems with this archive file and the files it contains.
Above all, the only .mat file provided, i.e. ss_cantilever_pva.mat, is corrupted, making the testing and understanding of the example described impossible.

[Marco Palladino]

Is it possible to have the data files provided by cosmos and used as input in cosmos2m?

[Aitor Olarra]

The archive seems to be an invalid ZIP file.

[Thomas Miu]

When try to unzip, got two bad CRC "8f061a29 (should be 3edde5fb)" and "487d514a (should be df7ebeed)".

[Shun'ichi Shido]