Mechanical Simulation International, Inc.

Defense Transportation Technology


 

 

Transportability Modeling and Simulation

MechSim uses modeling and simulation tools to immerse new and modified vehicles into virtual transportation environments to evaluate transportability characteristics, assess compatibility with transportation assets and infrastructure, and facilitate successful design for transport.  Our transportability modeling capabilities include:

  • Aircraft loading simulations (using accurate 3D cargo bay models)
  • Tiedown/lift provision placement, size and strength analysis 
  • Rail impact test simulation 
  • Airdrop simulation 
  • Shock and vibration analysis

We have a substantial library of existing models (3D high-detail geometry and multibody dynamic) and access to historical test data that can be leveraged for use in new projects.  The following images are excerpts from our transportability background and applications.  Each project is backed by substantial validation work where model data is compared to measured live data. MechSim has a wealth of experience analyzing the effects and constraints of the transportation environment on various types of cargo in all modes of transport.

Call us to discuss your transportability modeling and simulation needs.


Stryker C130 Transport

The Stryker weapon system is required to be transportable on C130 aircraft.  This requirement has many engineering implications including weight, structural loading of the ramp, and physical clearances.  MechSim personnel worked with TACOM, General Dynamics, Lockheed-Martin, and DoD test facilities to help the Stryker program meet the C130 challenge.

   Download Stryker-C130 Movie (9 MB)

 


Air-Drop Simulation


The first image below shows a HMMWV truck that was air-delivered using parachutes, a pallet, and crush-core padding. The next images shows the measured vertical acceleration. The next two images show our dynamic model and the simulated chassis acceleration results. This model is useful for design integration of additional components on the HMMWV system.
















Download Airdrop AVI file (444Kb)

 


Rail Impact Application

The following images show an application of the rail impact simulation capability. Here, a test item failed the live test (permanent deformation of tiedown lugs). Simulation was used to redesign the lug and retest the system. No additional live testing was required.