Prediction Of High-speed Rigid Body
Manoeuvring In Air-water-sediment
Author(s)
P. C. Chu & G. Ray
Abstract
Falling of rigid body through air, water, and sediment with high speed is
investigated experimentally and theoretically. Several experiments were
conducted to shoot bomb-like rigid bodies with the density ratio similar to MK-
84 into the hydrographical tank. During the experiments, we carefully observe
the position and orientation of the bomb-like rigid bodies. The theoretical work
includes the development of 3D model for predicting high speed rigid body
manoeuvring in air-water-sediment columns (STRIKE35) which contains three
components: triple coordinate transform, hydrodynamics of falling rigid object in
a single medium (air, water, or sediment) and in multiple media (air-water and
water-sediment interfaces). The model predicts the rigid body’s trajectory in the
water column and burial depth and orientation in the sediment.
Keywords: body-flow interaction, bomb manoeuvring.
1 Introduction
Study on falling rigid body through air, water, and sediment with high water
entry speed has wide scientific significance and technical application. The
dynamics of a rigid body allows one to set up six nonlinear equations for the
most general motion: three momentum equations and three moment-ofmomentum
equations. The scientific studies of the geotechnical characteristics of
a rigid body in water and sediment involve nonlinear dynamics, body and multiphase
fluid interaction, body-sediment interaction, supercavitation, and
instability theory.
The technical application of the hydrodynamics of a rigid body with high
speed into fluid and non-fluid includes aeronautics, navigation, and civil
Keywords
body-flow interaction, bomb manoeuvring.
Related Book
Other papers in this volume
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