LMS Test.Lab Modal Analysis offers a powerful single (SIMO) and multiple input (MIMO) acquisition and analysis solution for both experienced and less acquainted users. It allows engineers to solve operational noise and vibration problems caused by inherent structural dynamics of a structure or by changes in its inherent structural dynamics after a time in operation. Examples of these problems include the booming noise at the engine firing frequency, turbine blade resonance at operational speeds, high-amplitude vibrations at aircraft seat positions, etc.
LMS Test.Lab Modal Analysis uses controlled dynamic excitations of the structure to deduce inherent dynamic properties. These properties include a series of unique deformation patterns or mode shapes, the resonant frequency at which each shape occurs and a damping factor describing how rapidly free response in the mode shape decays with time. Modal Analysis is typically conducted when structural resonance, rather than frequency content of the dynamic excitation, is expected to be the root cause of a vibration problem at a given frequency.
The resulting modal model (frequencies, damping, modeshapes) is used to interpret the nature of the deformation causing the problem, to validate simulation models that are used to investigate design alternatives, or to predict the effect of simple structural design modifications on the vibration level at critical locations and operating conditions.
- Robust parameter extraction technologies ensure high quality, operator-independent results, even for highly-coupled, highly-damped structures
- With the expert knowledge embedded in the workbooks, even non-expert users can perform successful modal test campaigns
- Embedded workflow ensures repeatable test procedures according to quality standards
- On the spot analysis capabilities shorten the time required to develop engineering insights for troubleshooting or design validation
