Browse Publications Technical Papers 1999-01-1783
1999-05-17

Industrial Applicability of Modal Analysis on Operating Data, 1999 1999-01-1783

Traditionally, vibration analysis in operating conditions (on the road or on a bench) had to be combined with experimental modal analysis in controlled laboratory conditions in order to understand the modal behaviour of the structure. This requires additional measurements, costs and time. However, in many applications, the real operating conditions may differ significantly from those applied during the modal test and hence the vibration modes from the modal test might not be representative for the active modes in operation conditions. The need for a capability of doing a modal analysis on data from operating conditions is obvious.
Over the last years, several modal parameter estimation techniques have been proposed and studied for modal parameter extraction from output-only data. Each method needs to make a number of assumptions and has some limitations. In this paper, the capabilities and limitations of the Least Squares Complex Exponential and two subspace techniques, referred to as the Balanced Realization (BR) and the Canonical Variate Analysis, are evaluated for its applicability to industrial cases.

SAE MOBILUS

Subscribers can view annotate, and download all of SAE's content. Learn More »

Access SAE MOBILUS »

Members save up to 18% off list price.
Login to see discount.
Special Offer: Download multiple Technical Papers each year? TechSelect is a cost-effective subscription option to select and download 12-100 full-text Technical Papers per year. Find more information here.
We also recommend:
TECHNICAL PAPER

Excitation Control for Consistent Modal Parameters When Testing Nonlinear Structures

2003-01-1629

View Details

TECHNICAL PAPER

Effect of Welded or Glued Joints on Modal Properties of an Assembly

2003-01-1717

View Details

TECHNICAL PAPER

V160 STIRLING ENGINE PROGRAM UPDATE

880542

View Details

X