Kinetic impact is a feasible method to deflect potentially hazardous asteroids, and the momentum transfer efficiency is the main indicator to evaluate the deflection result.Based on the NASA DART scenario, numerical simulations of kinetic impact on asteroid for deflection were carried out by use of a homemade hydrocode NTS, for analysis of the influences of tensile strength and porosity on the momentum transfer efficiency.It is found that material with stronger tensile strength, would lead to smaller impact crater, less total ejecta mass and lower momentum transfer efficiency.The shockwave attenuating rapidly in porous material, resulting in smaller damage area, with higher porosity would lead to less total ejecta mass and lower momentum transfer efficiency.
CHEN Hong
,
LI Yi
,
ZOU Sheng-yu
,
ZHOU Hao
. Numerical Simulation Study on Momentum Transfer Efficiency of Kinetic Impact Deflection of Asteroid[J]. Journal of Space Science and Experiment, 2022
, 22(3)
: 19
-25
.
DOI: 10.19963/j.cnki.2096-4099.2022.03.003
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