The Traffic Accident Reconstruction Origin -Article-

Stiffness Calculator

© Copyright 1994 James Perry All rights reserved. For personal use only.

Program Description

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.

INSTALLATION

To run the Stiffness Calculator successfully, your computer needs the following:

• 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 subdirectory.
• 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.

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