Military Blast Effects Expert System (MBEES) - A Deployable Tool that
Rapidly Calculates the Blast Effects on Structures and Personnel
Background

As
part of the Force Protection Against Enhanced Blast Technology Demonstration
Program (FPAEB TDP), DRDC Suffield has developed the Military Blast Effects
Expert System (MBEES), a software package designed to assist operational commanders
and engineers in the design and improvement of expeditionary field fortifications.
Operating on a standalone laptop computer, MBEES evaluates the blast loading
and structural response of existing field fortifications, while also serving
as a design tool for new structures and camp layouts. MBEES also has the capability
to analyze personal vulnerability to blast.
MBEES prediction (above,
with roof removed) compared to field trial results (below) from DRDC
Suffield.
The
software has been developed by TimeScales Scientific Ltd., a Canadian
company with personnel having over twenty five years of CFD and blast/explosive
experience, and by the Civilian and Military Critical Infrastructure
Surety
team from ESI (Engineering Services Inc). This strong scientific background
has been combined with input from Canadian Military Engineers (end-users)
to create a useful and practical tool that fills a void in operational
requirements. MBEES is continually being validated through an extensive,
livefire, full-scale testing program over the four-year FPAEB TDP.
The results of live-fire, full-scale testing at DRDC Suffield are used
to validate MBEES calculations.
MBEES Scope
MBEES runs in an intuitive, modified AutoCAD environment,
remaining user-friendly through the use of straightforward icons and graphics.
What sets MBEES apart from existing blast effects calculators is its very
short computational time, focus on expeditionary structures, threat database,
and the field advisor tool.
1. Computational Time:
Thousands of lengthy CFD calculations have been performed during the MBEES
development stage, leading to a library of blast data that is rapidly
searched (and interpolated) during analysis. This process yields good
accuracy in a short calculation timeframe, making MBEES a practical tool
for deployed operations.
MBEES results can show deformation, pressure, impulse, personnal
vulnerability, fireball radius and crater depth.
2. Expeditionary structures:
Compared to programs that require materials and structural data for industrial, commercial, residential and other buildings, MBEES has remained streamlined by focusing solely on those structures built on deployed operations. MBEES allows the user to build structures, or to choose and modify from a library of pre-designed (and validated) structures.
3. Explosives and weapons database:
The MBEES threat library is extensive, ranging
from bombs and missiles to fuel-tanker sized detonations and 2 kg thermobaric
charges. The program also supports user-defined explosive mixtures and charge
sizes. Again, the results from this feature are being validated using livefire
field trials at DRDC Suffield.

MBEES allows user to build from scratch or to modify structures from a
library.
4. Field Advisor:

Feedback from deployed engineers identified a requirement
for an advisory tool capable of storing force protection lessons learned and
construction guidance for expeditionary structures. MBEES delivers this capability
in a PDA supportable Microsoft PowerPoint ™ format. The blast calculation
results may also be presented and stored in this format. Additionally, the
field advisor module can show construction sequences for expeditionary structures.
MBEES is capable of simlutaneously analyzing multiple structures.
Other MBEES Advantages
Further setting MBEES ahead of other similar products are its consideration
of a wide variety of blast loading phenomena including blast reflection, clearing,
diffraction, shielding, ingress, focusing, positive and negative phases and
blast loading from elevated threats. The software also incorporates human vulnerability
models and new fast-running multiple-degree-of-freedom models for the response
of modern military structures. MBEES is capable of analyzing multiple structures
simultaneously, as would be the case in a deployed camp.