RDA, the modern FE-based PC code supplied with this book, is presented from a fundamentals perspective in Chapter 2 and a user’s perspective in Chapter 4. There are a number of commercially available codes with similar capabilities. Engineering analysis codes in general and rotor dynamics codes in particular nearly always have one tacit fundamental trait in common. That trait is as follows:

With this approach, the typical computer code developer and marketer has long been quick to tout their code as capable of handling “any” conceivable problem within the code’s intended range of usage, as long as one has all the “correct” inputs.