SSMtool (SSMtool.zip) is a Matlab-based computational tool for computing two-dimensional spectral
submanifolds (SSMs) in nonlinear mechanical systems with arbitrary degrees of freedom. SSMtool is intended for researchers and students who are interested in extracting
key-information, such as reduced-order models or backbone curves from a nonlinear,
dissipative mechanical system with a potentially large number of degrees of freedom.
The software achieves this without using any numerical integration or numerical continuation
techniques, purely based on a reduction to SSMs. Documentation on how to
use SSMtool is provided in the ssmtool_manual.pdf file.