@Article{CiCP-17-2,
author = {},
title = {Multiple-Body Collision Algorithms for Computational Simulation of High-Speed Air-Delivered Systems},
journal = {Communications in Computational Physics},
year = {2015},
volume = {17},
number = {2},
pages = {564--593},
abstract = {<p style="text-align: justify;">Currently, there exists a lack of confidence in the computational simulation
of multiple body high-speed air delivered systems. Of particular interest is the ability
to accurately predict the dispersion pattern of these systems under various deployment
configurations. Classical engineering-level methods may not be able to predict
these patterns with adequate confidence primarily&nbsp;<span style="text-align: justify;">due</span>&nbsp;to accuracy errors attributable
to reduced order modeling. In the current work, a new collision modeling capability
has been developed to enable multiple-body proximate-flight simulation in the
Loci/CHEM framework. This approach maintains high-fidelity aerodynamics and incorporates
six degrees of freedom modeling with collision response, and is well-suited
for simulation of a large number of projectiles. The proposed simulation system is
intended to capture the strong interaction phase early in the projectile deployment,
with subsequent transfer of projectile positions and flight states to the more economical
engineering-level methods. Collisions between rigid bodies are modeled using an
impulse-based approach with either an iterative propagation method or a simultaneous
method. The latter is shown to be more accurate and robust for cases involving
multiple simultaneous collisions as it eliminates the need to sort and resolve the collisions
sequentially. The implementation of both the collision detection methodology
and impact mechanics are described in detail with validation studies to demonstrate
the efficiency and accuracy of the developed technologies. The studies chronologically
detail the findings for simulating simple impacts and collisions between multiple
bodies with aerodynamic interference effects.</p>},
issn = {1991-7120},
doi = {https://doi.org/10.4208/cicp.231113.290914a},
url = {https://global-sci.com/article/80390/multiple-body-collision-algorithms-for-computational-simulation-of-high-speed-air-delivered-systems}
}