# ElementalLee

Elemental Damping Using Lee's Formulation

## References

1. [10.1016/j.compstruc.2023.107152](https://doi.org/10.1016/j.compstruc.2023.107152)

!!! Note\
This modifier must be used with [`LeeElementalNewmark`](../../integrator/implicit/newmark/leeelementalnewmark)\
integrator to work properly.

## Syntax

```
modifier ElementalLee (1) (2) [(3)...]
# (1) int, unique modifier tag
# (2) double, damping ratio
# [(3)...] int, element tags
```

## Remarks

1. If no element tag is provided, this modifier applies to all active elements.\
   In this case, it is equivalent to a global damping model such\
   as [`LeeNewmark`](../../integrator/implicit/newmark/leenewmark)\
   or [`LeeNewmarkFull`](../../integrator/implicit/newmark/leenewmarkfull).
2. Unlike the above global damping models, damping ratio is applied to each element individually. In case of an invalid\
   number assigned, a default one $$0.02$$ is used.
