# liquefaction.ru_linear()

Pore-pressure ratio growing linearly with the cycle ratio.

Usage

[Source](https://github.com/lornearnold/driven-pile/blob/main/src/driven_pile/liquefaction.py#L166-L182)

``` python
liquefaction.ru_linear(
    n_felt,
    nl,
)
```

## Parameters

`n_felt: array_like`  
Cycles (blows) felt.

`nl: array_like`  
Cycles to liquefaction.

## Returns

`ndarray`  
`min(n_felt / nl, 1)`.