In addition to our main analysis programs FEMRDYN and iSTRDYN, we also offer two utility programs:
BAFLER (BAlancing of FLExible Rotors):
For balancing a multi-plane rotor at several speeds, BAFLER determines correction values using a least-squares weighting factor approach. Program features include:
Multiple correction planes, with provision for handling initial weights
Multiple sensor planes, with capability to subtract initial runout values
Multiple balance speeds
Tabular input of all balancing data
Complete listings of all input and calculated quantities
Graphical display of response and corrections:
Runout (if any) at each sensor
Initial response at each speed and sensor
Trial response at each speed and sensor
Predicted response at each speed and sensor
Initial weights (if any) at each correction plane
Calculated weights at each correction plane
Export of all listings and plotted quantities
All input quantities saved to XML file
Platform independent (Windows, Unix, Linux, Mac)
BAFLER is designed to allow quick data entry and easy review of all input and calculated quantities. There is no limit to the number of speeds, correction planes, or sensors, allowing very large systems to be balanced. For more information about this program, including pricing, please contact us.
As a service to the engineering community, we are making available two different Java programs that integrate a system of first order differential equations. We use the algorithms in our rotor dynamics codes. The programs are contained in a WinZip file, with the following contents:
A Java source file with the integration done entirely with double arrays
A Java source file with the integration performed using JAMA (Java Matrix Algebra)
An Excel spreadsheet that plots the displacements (as shown in figure)
A text file that lists the results from using doubles and JAMA
Both source files integrate a 2 DOF spring-mass problem by converting the 2nd order system to first order. You may use these codes free of charge, as long as you agree to the following:
1. You give credit to DynaTech Engineering as the original author.
2. You assume all liability for use of the software.
To download these programs, click here.
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