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Modal Analysis

 
LMS Test.Lab Modal Analysis offers various fast and accurate single or multiple reference parameter estimation algorithms. The FRFs are gathered and automatically organized to give a comprehensive view of the available data and facilitate FRF selection/de-selection. Various sum and mode indicator functions help stabilization diagram interpretation and pole selection. The solution offers a complete set of modal model validation tools. The scrolling FRF synthesis automatically synthesizes FRFs and updates displays, without any user interaction, for fast and in-depth modal model validation.
 

Modal Analysis LR 01.jpgLMS Test.Lab Modal Analysis offers various fast and accurate single or multiple reference parameter estimation algorithms. The FRFs are gathered and automatically organized to give a comprehensive view of the available data and facilitate FRF selection/de-selection. Various sum and mode indicator functions help stabilization diagram interpretation and pole selection. The solution offers a complete set of modal model validation tools. The scrolling FRF synthesis automatically synthesizes FRFs and updates displays, without any user interaction, for fast and in-depth modal model validation.

LMS Test.Lab Modal Analysis provides all the tools and functions required for experimental modal analysis. It includes tools to easily create FRF sets, perform modal parameter estimation in a fast and easy way on these FRF sets, validate the modal model using different methods and compare the original FRFs with synthesized ones. A worksheet-by-worksheet procedure guides the user through the basic steps. 

For multiple patch measurements, the multi-run modal analysis provides an easy method to solve potential data inconsistency issues between patches. Multi-run modal analysis provides a dedicated processing of modal test data that was obtained through different sets of measurements. This acquisition technique is widely applied when a limited set of accelerometers needs to be relocated to measure all response points of the structure. In such a case, FRF inconsistencies could affect the modal parameter estimation quality. Multi-run modal analysis automatically accounts for potential data inconsistency between runs when extracting modal frequencies and damping as well as during the subsequent mode shape calculation.

For complex structures, LMS Test.Lab PolyMAX provides a state-of-the-art modal parameter estimator and expert-like automatic modal pole selection (AMPS) facility. Combination of these tools provides fast and user-independent results. LMS Test.Lab PolyMAX is available as an add-in to LMS Test.Lab Modal Analysis.



Features

  • Analysis data in acceleration, velocity and displacement format
  • Calculate/show sum of FRFs and mode indicator function such as CMIF
  • Modal parameter estimation based on LSCE method in 3 steps
  • Automatic damping value correction when FRF measurements use exponential window
  • Wide range of validation tools such as modal assurance criterion, modal phase collinearity, mean phase deviation
  • Data inconsistency rectification with multi-run modal analysis


Benefits

  • Complete solution for modal analysis, optimized for ease-of-use
  • State-of-the-art modal parameter estimation delivers clear stabilization diagrams, reducing complexity of pole selection and number of processing iterations
  • Yields user-independent modal models



Covering a range of industries, LMS application cases let you discover how LMS solutions help our customers solve their real-life engineering challenges. 

Modal Analysis LR 03.jpgAutomatic modal analysis. Reality or myth?

The increasing use of modal analysis as a standard tool means that both experienced and inexperienced analysts are faced with new challenges; uncertainty about the accuracy of results, inconsistency between estimates of different operators, the tedious task of selecting obvious poles in a stabilization diagram and the time-consuming iterations required to validate a modal model. LMS, as a leader in modal analysis, undertakes a continual quest to ameliorate these problems.

 
Engineers-at-the-US-NREL-use-LMS-Test-Lab-in-performing-modal-testing-on-next-generation-wind-power-systems

Engineers at the U.S. Department of Energyís National Renewable Energy Laboratory use LMS Test.Lab in performing modal testing on next-generation wind power systems destined to radically change Americaís energy policies in decades to come.



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 Lowering Noise in High-Powered MRI Scanners - GE Heatlhcare 

The new test system enables engineers at the Florence center to perform acoustic and vibration testing and analysis without shipping the existing LMS equipment from the Global Research Center more than 700 miles away in Schenectady, New York.



 




Brochures
Download the LMS Test.Lab Structures Brochure

Images

Modal Analysis LR 02.jpg Modal Analysis LR 03.jpg Modal Analysis LR 04.jpg
The geometry workbook provides full 3D visualization of test and analysis results. Through crystal clear stabilization diagrams, the structural analysis of a printer is simplified. The software provides a wide range of validation tools such as modal assurance criterion.




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