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8420 - 1 - Modal Analysis
8420 - 3 - Modal Analysis
8420 - 2 - Modal Analysis

Modal Analysis - 8420

Provides powerful tools for creating geometries and a comprehensive set of analysis and validation tools for single-reference modal analysis.

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Modal Analysis - 8420

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BK Connect Modal Analysis performs classical modal analysis by extracting modal parameters from Frequency Response Functions (FRFs) acquired using impact hammer or single shaker excitation of the structure. 

The intuitive highly customizable graphical user-interface (GUI) is built around the analysis workflow and guides you step-by-step through the analysis with visual feedback, through measurement validation, parameter estimation set-up, mode selection, analysis validation and reporting. This enables operators and test engineers to routinely perform modal analysis, while allowing a high degree of flexibility for the modal specialist. 

 

CHARACTERISTICS

The software contains powerful tools for geometry creation using top-down or bottom-up modeling. In addition, test geometries can be imported and imported FE models can be decimated down to test geometries. The modal parameters can be extracted and validated using different MIFs, SDOF and MDOF curve-fitters and validation tools. A large number of animation types are available for best possible results investigation and documentation.  

CAPABILITIES

  • Geometry-guided measurement validation and analysis
  • Function‐based animation for test set-up and measurement validation
  • Clear stability diagrams for improved overview and straightforward mode selection
  • Frequency response function (FRF) synthesis including error function and frequency response assurance criteria (FRAC) 
  • A comprehensive set of mode indicator functions (MIFs), curve-fitters and analysis validation tools:
    • Normal mode indicator function (NMIF) and power mode indicator function (PMIF)
    • SDOF and MDOF curve-fitters
    • Local and Global solve curve-fitting
    • Stability diagram with Enhanced Mode Solution 
    • Analysis validation: AutoMAC, CrossMAC, Complexity plot and CoMAC geometry plot
  • As an open, stand-alone application with your existing data acquisition system

ADDITIONAL CAPABILITIES

REQUIREMENTS

  • Single-reference classical modal analysis from measured FRFs
  • Estimation of modal parameters to be used for finite element (FE) model correlation and updating, design verification, trouble-shooting, benchmarking and quality control 
  • Test planning and validation using finite element analysis (FEA) results 

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