Does gravitational lensing affect gravitational waves?
This article explores this dynamic:

Gravitational Wave Lensing
(think about that a minute)

Click the link below and
Download Orbit Game 10 (2014)
to see real-time computations
as well as how these images for
gravitational lensing were generated:

>> orbit-game-10.exe <<

152 kb

If your PC is set to use the comma as a decimal separator,
then these apps won't work so good.

More about gravity here:

A Summary of The Force of Gravity
& Other Gravity Simulators