The origin of the gravitational waves can be in the internal structure of objects.

Neutron stars can lead us to the source of gravitational waves. Gravitational waves are oscillations of the gravitational fields. And the key question is what causes that oscillation. There must be something that disturbs the gravitational field so that it can oscillate. The difference between regular objects and neutron stars is that a neutron star is a fully homogenous object there are only neutrons in its structure. 

There is the possibility that this thing can make a situation where neutrons and especially their internal structure spins synchronized in the same direction. Neutron is one of the hadrons or baryonic hadrons. There are three quarks in that structure. And in this model, those three quarks are spinning at a different speed than the neutron's shell. That spin causes an effect where those quarks or gluon (or gluon channels) between those quarks will affect the gravitational fields. 

The spin of protons and neutrons is 1/2. That causes a situation that they wobble back and forth. The idea is that when the internal structures of baryons are wobbling back and forth that structure sends electromagnetic impulses to the neutron's shell. In normal stars. Or in normal objects that back-and-forth wobbling spin happens at different times. The reason for that is that the internal structure of regular objects is not homogenous. And that thing limits the power of the gravitational field. 

But in neutron star-type objects all those structures could spin at the same time, in the same direction. That thing sends energy waves around the neutron star. And between those energy waves could form the electromagnetic vacuum that pulls electromagnetic fields to the neutron stars. Then those vacuums are pulling particles to that neutron star or black hole. When outside electromagnetic radiation hits to neutron star it causes energy asymmetry in that structure. The energy asymmetry means that other neutrons are at higher energy levels than others. And that causes a situation in that information travels between neutrons. 

In black holes, massive gravity causes a situation the energy level in the entire singularity is the same. So no energy travels in the singularity. The singularity behaves as an entirety. And then that thing makes it possible that the energy impulses to travel out from the black hole with extreme power. The model goes like this: the black hole is the object there is no internal energy transfer. 

When normal particle groups reach the same energy level or otherways saying all particles in the groups reach the same energy level that destroys the quantum system. But in very massive objects the gravitational interaction can cause situations where all particles have the same energy level and the gravitation ties them into one entirety. 

All parts of the singularity have a homogenous energy level. And the only point where the energy travels out from the singularity is its shell. That thing makes a model where the event horizon is the impact point between energy waves that come out from singularity and outcoming energy fields. So singularity is a so-called cold object that pulls energy inside it.  

The extreme density of the singularity causes a situation where those energy waves are reflected from its shell. Also, the energy flow from the singularity increases the power of that radiation. And then that thing causes a thing called the event horizon which could be the standing gravitational wave.