Once the parameters in FE model are defined, their value can be updated:
```tcl
updateParameter $tag $newValue
```
tag
integer tag identifying an existing parameter that is to be
updated.
<specific object arguments>
the updated value to which the parameter needs to be
set.
Reference:
Scott M.H., Haukaas T. (2008). “Software framework for parameter
updating and finite element response sensitivity analysis.” Journal of
Computing in Civil Engineering, 22(5):281-291.