Non-Contact Diagnostics in Structural Dynamics by Daniel Rohe, April 2022

From Joints Committee
NonContact Diagnotics in Structural Dynamics Daniel Rohe April122022
Jump to navigation Jump to search

Non-Contact Diagnostics in Structural Dynamics

Daniel Rohe

Sandia National Laboratories, Albuquerque, NM

April 12, 2022


Non-contact diagnostics have several advantages over traditional discrete sensors such as accelerometers and strain gauges. For example, measurements can be taken without mass loading the structure. Generally, full-field, three-dimensional data can be acquired. Non-contact techniques can also be much quicker to field compared to traditional instrumentation. Several classes of non-contact diagnostics are fielded by the Sandia National Laboratories Experimental Structural Dynamics Laboratory, including Scanning and Multi-point Laser Vibrometry, High Speed Video and Digital Image Correlation, and even X-ray Imaging to capture motions of internal components of a system. This talk will give a practical overview of these diagnostics, highlighting the application space where each system is most useful.


Dan Rohe is a Principal Member of the Technical Staff at Sandia National Laboratories and has worked in the Experimental Structural Dynamics group for the last 8 years. He is the principal investigator and portfolio manager of a non-contact diagnostics research program, which focuses on fielding optical testing techniques for structural dynamics applications. He has a wealth of experience testing with laser vibrometry and digital image correlation. Most recently, he has been working on incorporating radiographic (X-ray) imaging into structural dynamics testing. It is Dan’s goal to never have to glue on another accelerometer. Dan has a Master’s degree in Experimental Mechanics from the University of Wisconsin – Madison and just recently defended his PhD dissertation in Mechanical Engineering from the University of Massachusetts – Lowell.

Video Presentation