Simulations of Trajectory of Separated Objects after Impact

Estimating the trajectory of separated objects after disintegration caused by impact will be useful in crashes analysis of airplane, especially in the circumstance when the impact condition cannot be totally determined. Since the motion of an airplane’s fragments in air is highly effected by the aerodynamic loads, computational fluid dynamics with an automated unstructured tetrahedral mesh approach using spring-based smoothing and remeshing are employed. Three-dimensional compressible Navier-Stokes equations and six degree of freedom (6-DOF) rigid body motion equations are solved by Euler solver coupled with 6-DOF time integration module. Three different parts of the airplane whose aerodynamic characteristic can be described as regular or irregular and the flight stability is from stable to unstable such as: bomb-like object referred as the store and wingtip segment are investigated. Numerical simulations are performed under various initial conditions. Trajectory of the store structure results are validated with published data and found to be in good agreement.

Language

  • English

Media Info

  • Media Type: Web
  • Pagination: pp 667-677
  • Monograph Title: Earth and Space 2018: Engineering for Extreme Environments

Subject/Index Terms

Filing Info

  • Accession Number: 01851559
  • Record Type: Publication
  • ISBN: 9780784481899
  • Files: TRIS, ASCE
  • Created Date: Jul 18 2022 9:27AM