Project Chrono: MODAL module

Namespaces
MODAL module

## Description

Modal analysis and substructuring.

Using this module, you can perform modal analysis directly in Chrono. This can be useful for computing natural frequencies, for computing stability (complex eigenvalue analysis, with damping matrices), for substructuring (where subassemblies are replaced by modal bodies).

For additional information, see:

- the installation guide
- the tutorials

## Namespaces
namespace | chrono::modal
| Namespace with classes for the modal module.