1. ATTACHMENT 0028
M&S CAE Models
04 November 2011
Distribution Statement A – Approved for Public Release; distribution unlimited
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2. 1 Simulation-based design Models
1.1 Simulation-based design Computer Aided Engineering (CAE) models for JLTV must contain:
a. finite element models (meshed components and subsystems) suitable for linear/non-linear analysis using
implicit/explicit methods
b. product geometry shape (3-D CAD geometry idealized suitable for generating required analysis models
that includes appropriate geometric simplifications) defect-free topology
c. material characterization test data (elastic and plastic stress-strain curves for tension, compression and
torsion)
d. engineering design concepts parametric data
e. analysis units of measure
f. analysis identification and composition
g. configuration and document management data
h. dynamic digital representations
i. cross sectional views
j. functional interfaces with other components, product structure
k. assembly bill of materials/work breakdown structure
l. CG points for major subassamblies
m. information, engineering performance parameters (goal of simulations)
n. CFD and mesh numerical models used
o. procedures defining input needed for analysis steps
p. field based property definitions
q. physical attributes of loads (load case): including all model inputs which may include material and mass
properties, boundary conditions, composite lay-up information, and modeling attributes
r. Multi-body dynamics models using DADS, ADAMS or MotionView etc. as used by the contractors.
s. Any active or semi-active control algorithms used either in the black-box or in the explicit equations
format. All input and output channels must be documented clearly with units, description, and sign-
convention.
1.2 The JLTV simulation-based CAE models listed above must be able to support Government analyses of the
following types:
a. Structural analysis of structure and subsystem components
b. Thermal analysis of exterior and interior
c. System off-road mobility
d. System ride and shock quality, lateral stability and turning radius
e. Propulsion system performance analysis
f. Crew safety and crashworthiness
g. Blast and shot-line survivability analyses
1.3 All CAD metadata attributes, solid model validation checks, and geometry creation standard must conform to
requirements outlined in CDRL Data Item A053
1.4 Data delivery must contain text formatted information file at the top directory level describing contents of any
disks delivered (readme.txt).
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