Are My Hammer Impact Results Valid? (1) Linearity
When performing experimental modal testing of a structure or component using impact (or ping) testing, it is important to consider and verify the validity of any results. A modal analysis…
Hammer Testing: Free or fixed support?
A vital question to be asked before performing hammer testing is - how do I support the testing object? What fixing mechanism to use? Or technically, what are the desired…
Rotational Analysis with no Tachometer Data
The identification of cyclic events in rotational analysis is often key to identifying problems. It is good practice to use a suitable sensor for capturing rotational speed. However, this is…
titanium and steel gears and cogwheels
Analysis of Dynamic Engine Vibration – Angular Vibration in High Performance Engines
The analysis of dynamic engine vibration and the accurate measurement of angular vibration is a non-trivial task, as a more in-depth analysis of boundary conditions reveals. Tools for engine vibration…
Vibration Condition Monitoring Doesn’t Get More Mobile Than This!
Have you ever wondered if there is a vibration condition monitoring system that can be installed anywhere and then monitored from anywhere else? Even on your smartphone? Well, there is. The following…
In-situ balance of an Open Cycle Gas Turbine
A vibration problem arose at an Open Cycle Gas Turbine. Following an outage on the four gas turbines and two SSS[1] clutches, the machine returned to service with unacceptable vibration…
