Experimental Structural Dynamics

An Introduction to Experimental Methods of Characterizing Vibrating Structures

by Robert E. Coleman



Book Details

Language : English
Publication Date : 6/17/2004

Format : Softcover
Dimensions : 6x9
Page Count : 264
ISBN : 9781418411381
Format : Hardcover
Dimensions : 6x9
Page Count : 264
ISBN : 9781418411398

About the Book

It is not uncommon to find engineers in test labs or design groups who have not had occasion to use the mathematical tools acquired in college. When suddenly faced with vibration issues they find themselves ill equipped to get a solid grasp of the vibration process. It is the intent of this technical reference to provide access to vibration theory, initially at a very elementary level, then progressing from basic analytical formulations toward the more mature mathematical representations associated with eigenvectors and the Fourier Transform.

Mode shapes are introduced without any reference to the eigenvalue problem, but connected immediately to simple coordinate transformations in two and three dimensions. This allows a rather simple picture of operators, ultimately leading to a straight forward derivation of the Frequency Response Function (FRF) formula.

It is hoped that many engineers will find their way back into a more analytical approach to vibration problems. Experienced analysts and academics were given consideration as well, providing fresh viewpoints from time to time, such as the development of modal force as a contravariant vector, providing a detailed view of the FRF as a superposition of modal FRFs.

About the Author

Robert E. Coleman pursued a career largely in aerospace engineering, although his academic background is entirely physics. His work has spanned 44 years, beginning with Polaris Rocket testing at the U.S. Naval Propellant Plant, and continues with Signalysis, Inc. of Cincinnati, Ohio. His most significant effort may have been as part of NASA’s SMIS project while working at Johnson Space Center in Houston, TX. Here, analytical finite element and experimental modal test methods were combined to analyze Shuttle Orbiter structural integrity after space flight missions. Coleman was presented the Astronaut’s Silver Snoopy Award for his contribution. Some of the NASA technology has been brought to bear at Signalysis, using intrinsic vibration characteristics to detect product defects on assembly lines of numerous plants across the U.S. and abroad.