Impact simulation of solar pannel by space debris

Paper number

IAC-09.A6.P.14

Author

Mr. JiJoong Moon, Korea, Republic of

Year

2009

Abstract

Space debris has become a growing concern in recent years, since collisions at orbital velocities can be 
highly damageing to functional satellites and it produce more space debris. 
In the earch's orbit, there are approxiately 7000 bebris which size is more than 10cm and over 17,500 which is 1~10cm.
If these debris are impact with the spaceship or satellite, then it is seriously damaged because the debirs orbit the 
earth as 3~7.8km/h. And it is difficult to understand how many and how serious the damages by experiment because the function 
environment of satellite or spaceship is in the middle of space. Therefor the computer simulation could be efficient way for 
impact by space debris. 

Especially the solar pannel is a most broad part among the satellite and easy to damage by space debris. It is the reason that 
impact of solar pannel is simulated. 

In order to simulate the impact of solar pannel by space debris efficiently, it is important
that simulation of material facesheet. the facesheet is usually M55J grapite and it has brittle property.
In order to simulate to brittle property material, we use parallel node split algorithm. 
if some part of brittle material is damaged, the number of node which is key value for a mount of calculation is growing seriously therefore
it take a week or a month depends on problem size. there are a few effort to reduce the calculation time and the parallelization could
be efficient way due to its scaleability. However, in order to develop the efficent parallel node split algorithm, much difficulties should over come such as 
the domain partitioning, unification of node index among domains because new node is generated as fracture is growing, communication methods and so on.

In this paper, the node split algorithm and it's strategy for parallelization are descirbed and the damages by space debris is simulated.

Abstract document

IAC-09.A6.P.14.pdf

Manuscript document

(absent)