COMMON ERRORS THAT LEAD TO THE MISINTERPRETATION OF OPERATING DEFLECTION SHAPE (ODS) DATA

摘要

If done properly, an operating deflection shape (ODS) test will provide an animation of the structural dynamic response of a mechanical system at any discrete frequency. However, it is important to realize that an ODS can be affected by many things that could result in an incomplete, or even inaccurate animated shape. An incomplete or inaccurate animation can lead to a misdiagnosis of a vibration problem. Some of the factors that can adversely affect the outcome of an operating deflection shape study include: