McHenry invented HVOSM on which the 3D EDVSM is based and some McHenry extensions for the HVOSM program are the 'Advanced Models' mentioned in the AD.
[*] From the EDC advertisement:
- "Radial Spring Tire Model - This model allows for simulating tires mounting curbs and rolling over potholes. The tire is modeled as a series of springs lying in the tire plane and projecting radially outward from the wheel center".
- Raymond R. McHenry invented the Radial Spring Tire Model around 1969. See Ray’s 1969 IME paper "An Analysis of the Dynamics of Automobiles During Simultaneous Cornering and Ride Motions"
- (see page 31-32 (pg 4-5 of the linked paper since it is from a book with other papers)) Included in msmac3D
[*] From the EDC advertisement:
- "Sidewall Impact Tire Model - This model is an extension of the Radial Spring Tire Model and allows for a rigorous modeling of the force applied to the sidewall of a tire such as occurs in a curb-tripped rollover. Each radial spring has springs projecting laterally from the wheel plane to the tire sidewall plane"
- Raymond & Brian McHenry invented the Sidewall Impact Tire Model around 1984 as part of research they performed for FHWA with respect to pavement shoulder drop-off simulation. See the Report Work Zones and Pavement Shoulder Drop off simulations (see page 112, etc. Included in msmac3D)
- "Soft Soil Tire Model - This model allows for calculating tire drag for a vehicle that has left the roadway and is traveling through soft dirt, sand or similar material. The model is based on research performed by M.G. Bekker at the University of Michigan. In the model, tire sinkage into the soil is calculated using an empirical model developed by Bekker."
- Raymond & Brian McHenry Invented the Soft Soil Tire Model in the mid 1980’s as part of proprietary internal research and provided to Calspan for a FHWA rollover study "Rollover Potential of Vehicles on Embankments, Sideslopes and other Roadside Features"
- (see page 37). Included in msmac3D
In Summary: The items in the recent advertisement by EDC/HVE are for 30+ year old "preliminary" McHenry versions used in research and provided to Calspan for highway safety research. EDC got a hold of the Calspan version of the HVOSM program with the McHenry Extensions and refinements and now market the McHenry extensions 30+ years later as "Advanced Tire-Terrain Models"'.
- Thank you Engineering Dynamics!
For acknowledgement that our 30+ year old McHenry inventions and extensions are still advanced in 2015!
And we will soon be making available our msmac3D program which will include those 'Advanced Tire Models' and many additional vehicle capabilities and enhancements we've created and enhanced for many more than 30+ years such as trailer options, articulated vehicle options, and much much more. And any and all enhancements will be included in the msmac3D license.
For information on msmac3D please see our msmac3D General Q&A forum topic.
Please consider McHenry Software for your simulation and collision reconstruction technology!
Contact us at msmac3D@mchenrysoftware.com