TYPE 8722

PULSE Reflex Correlation Analysis software

Software for correlating two modal models – typically a finite element model with a test model.

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This PULSE Reflex™ software allows you to perform a complete visual and numerical comparison of two modal models, typically a test model versus a finite element model (FEM). The complete workflow process is intuitive, yet flexible and guides you efficiently through geometry alignment, degree of freedom (DOF) mapping, comparison, vector comparison, mode pairing and reporting. In addition, test planning and test validation tools help you design optimal test conditions and evaluate different modelling strategies.


  • Identifying shortcomings in modal tests and insufficient quality in finite element (FE) models of automotive and aerospace structures
  • Applying information that can only be measured or simulated, such as applying measured modal damping to analytical modes and scaling operational mode shapes using the scaling from analytical mode shapes
  • Structural health monitoring (SHM) and damage detection on aerospace and civil structures like bridges, buildings and wind turbines by correlating (operational) modal test results with the analysis results of a reference FE model
  • Defining targets and updating variables for FE model updating 
  • Test planning: Decimation of an FE model to a test model for identification of optimal excitation and response locations, frequency range of interest, mode density and critical modes for the modal test
  • Test validation by comparing test and finite element analysis (FEA) results for test objects such as rotating machinery components


The software helps you to scale and orientate the two geometric models in order to align them for easy comparison. You can animate the various test and FE mode shapes and view mode tables, to clearly compare the modal parameters. You can then automatically pair modes from the two modal models according to their degree of frequency correlation or shape correlation.


  •  Import of test modal models in standard formats
  • Import of standard of FE models such as Nastran® (MSC, NX, NEi), ANSYS®, ABAQUS® or UFF files
  • Selection and validation of test nodes from FE models for test planning
  • Decimating finite element models to create test models
  • DOF mapping to match the DOFs from the two models being correlated
  • AutoMAC, crossMAC, auto-orthogonality and cross-orthogonality tables and 3D plots calculated in reduced test space
  • Import of reduced mass matrix from Nastran or ABAQUS
  • SEREP algorithm can be used if no reduced mass matrix is available
  • Expansion of test modal vectors to FE space using the SEREP algorithm
  • Integrated Microsoft® Office reporting capabilities


For correlation using common finite element models, we offer these interfaces:

  • PULSE Reflex Nastran Interface Type 8718-A
  • PULSE Reflex ANSYS Interface Type 8718-B
  • PULSE Reflex ABAQUS Interface Type 8718-C