you can define impact load as pressure load in abaqus

what type of wave do you want to simulate??

seismic or blast load or impact ??

you can define impact load as pressure load in abaqus

what type of wave do you want to simulate??

seismic or blast load or impact ??

thanks for your replay ....in fact I'd like to simulate impact load on the pavement surface, so this load will introduce a surface wave which it is type of seismic wave 

Impact load can also defined by a mass colliding with the surface. In the predefined fields option in ABAQUS  software.

1- Define the surface you need to work out, assign it's property.

2-Define part two for colliding and assign it's property

(While assigning property you should not give both elastic, hyper elastic etc.. it will show error in abaqus. choose one among them)

3- assemble the parts.

4-Define contact as hard on touching areas of both parts.

5- Give boundary conditions carefully. Do not arrest the degree of freedom of all areas,  do not restrict the degree of freedom on the direction of colliding.

6-Better to go for fine mesh.(to avoid distortion element errors and warnings)

Good luck

just see this tutorial

the main problem here, to avoid the distortion of element during the run 

 hi Mohamed Balbaa 

I have your pdf it was good... in my case, the impact is given by a laser shot ... how can I do that ..can u help me in that

This maight be useful.

https://www.google.co.uk/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&ved=0ahUKEwi6p5rLmPPXAhUDDMAKHZ6-DRQQFggnMAA&url=https%3A%2F%2Fwww.researchgate.net%2Fprofile%2FMohamed_Balbaa2%2Fpost%2FAny_advice_on_the_simulation_of_impact_load_by_ABAQUS%2Fattachment%2F59d643bfc49f478072eac330%2FAS%3A273812690538503%401442293440644%2Fdownload%2Fimpact_with_rigid_tutorial.pdf&usg=AOvVaw2Bw5tRhL1ljypIJfXguLIz

I hope you can get sufficient information from the document attached here with