Release Date - - 20 May 2008

This highly anticipated release offers extensive improvements and enhancements to the user interface and compatible physics models. Here is a brief overview of some of the enhancements users will find in Version 6.00:

Enhancements

DyMESH Version 2.0 - DyMESH has been significantly improved in the following areas:

• Multi-vehicle Collision Simulation
• Vehicle Body vs. Environment Interaction (Rollover Simulation)
• Contact Algorithm and Deformation
• Force and Acceleration vs. Time History
• Restitution Modeling

Benchmark testing also shows that code optimizations have reduced event run times by as much as 90 PERCENT! These run time improvements make the use of DyMESH practical for studying any real-world collision scenario. Here is a brief sample of the run time reductions for DyMESH validation cases:




Case/Event	HVE V6.00  Run Time	HVE V5.20  Run Time	Run Time Reduction
SimonDyMESHValidationSuite1_1    SIMON, Test 1	3 min 37 sec	32 min 33 sec	89%
SimonDyMESHValidationSuite2a    SIMON, Test 15	2 min 52 sec	26 min 52 sec	89%
SimonDyMESHValidationSuite4    SIMON, Test 13	7 min	68 min	90%
SimonDyMESHValidationSuite6    SIMON, Test 12	2 min 56 sec	6 min 16 sec	53%




More details about the improvements to DyMESH are presented in the Technical Session of the Winter 2008 EDC Technical Newsletter.

Additionally, the new Advanced Mesh Options dialog allows the DyMESH user to assign tessellation to a specific region of the vehicle. This "Super-Tessellation" provides the following benefits:

• Tessellates only the region of interest (faster simulation)
• Allows for the simulation of pole impacts

AutoConnect Tow and Towed Vehicles - EDSMAC4 provides an option for automatic matching of the connection heights between tow and towed vehicles. The user can choose between settings of Manual (User-Adjusted), Adjust Tow Vehicle, Adjust Trailer, or Adjust Both Equally using the Calculation Options dialog for the event.







EDSMAC4 CalcOptions dialog showing the Inter-Vehicle Connection options where the
user specifies the connection height matching behavior between tow and towed vehicles.





EDSMAC4 Steer Degree of Freedom - EDSMAC4 now supports the Steer Degree of Freedom model as discussed in the Technical Session of the Summer 2007 EDC Technical Newsletter. A great application of this feature is in the situation where a vehicle is spinning and/or sliding after a collision, and the driver is disabled and not providing steering input. In this situation, the vehicle is essentially self-steering based upon its steering system geometry and the current (post-impact) slip angle at each tire. The Steer DOF Model can simulate the post-collision steer angle history, providing an obvious improvement in the crash reconstruction.


EDSMAC4 Damage Reporting - EDSMAC4 now has improved post processor logic for matching the CDC, PDOF, Delta-V and Peak Acceleration to a Damage Range. The results are presented in the Damage Data report in Playback.

Show Joints - Icons for each joint connection between segments on humanoids are now displayed in the Human Editor.





Human Editor displaying an Adult Male Pedestrian. Note the green icons for joints at the connection between each segment .


Vehicle Mesh Tessellation in EDSMAC - EDSMAC users will now have the option to apply tessellation to the mesh of a generic vehicle which will improve the visualization of the damage profiles of vehicles involved in collision simulations.


IPC Redesign - The Inter-Process Communication (IPC) has been further redesigned to utilize shared memory for communication between HVE and all HVE-compatible physics programs. This redesign eliminates the use of sockets, thereby avoiding any conflicts with firewall settings or other Internet security programs.


CalcOptions Dialog for GBF - GBF users will now find additional parameters available in a Calculation Options dialog.


Vehicles Added to EDVDB Vehicle Database - The following table identifies the vehicles that have been added since the last update to the EDVDB vehicle database:

Vehicle	Year Range
Chevrolet Tahoe	1992 - 1999
Ford Explorer	2002 - 2005
Ford F150 Pickup	2004 - 2008
Ford Five-Hundred	2005 - 2007
GMC Yukon	1992 - 1999
Jeep Grand Cherokee	2005 - 2008
Lincoln Aviator	2002 - 2005
Mercury Montego	2005 - 2007
Mercury Mountaineer	2002 - 2005
Nissan Pathfinder	2005 - 2008

Please visit the Products pages of our website for more information about HVE and HVE-2D.