The Traffic Accident Reconstruction Origin -Article-
© Copyright 1994 James Perry All rights reserved. For personal use only.
The Stiffness Calculator computes stiffness constants from barrier crash
test data. These values are then used in programs or hand calculations
to estimate impact speeds and velocity changes. Barrier crash test data,
such as that available from NHTSA, serves as input for the program.
The Stiffness Calculator simply replaces the cumbersome hand calculations
used to compute the stiffness values. It has a simple interface and is
reasonably easy to learn.
To run the Stiffness Calculator successfully, your computer needs the
- Windows 3.1 or above (yes, it will work under Windows 95!).
- VBRUN200.DLL must be located in your Windows\System subdirectory. VBRUN200.DLL
is free and can be obtained directly from Microsoft.
ftp.microsoft.com. The file you are looking for is VBRUN200.exe.
- After downloding, you must run VBRUN200.exe from a dos prompt or File Manager. Executing VBRUN200.exe
will decompress and create the file VBRUN200.dll. Be sure you move this file to your Windows\System
- To install the Stiffness Calculator program on your computer, simply
download the compressed file Stiff1.zip to any subdirectory.
- Extract (unzip) the file by using a PKUNZIP. A Shareware
version of PKUNZIP is avalilble online.
- Once unzipped, you can run the program by opening File Manager or Windows Explorer and
double-clicking on Stiff1.exe.
James Perry is a Traffic Safety Investigator with Dynamic Science in Anaheim, California.
He holds an MS in Information Systems from Nova Southeastern University and a BGS in
Psychology/Police Sciences from the Univerity of Nebraska-Omaha.
He can be reached at:
299 West Cerritos Avenue, Anaheim, CA 92805