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Overview

The DATS Modal Analysis software consists of three options that may be used together or independently depending on the requirements of the test. These are Hammer Impact analysis, the Modal Analysis Suite and the Structural Animation software.

Hammer Impact Analysis Software

Structural response measurements are an essential requirement for engineers working on noise and vibration problems. The Hammer Impact Analysis Software guides the user through the process of making the measurements. The software gives the user full control over all aspects of the test including…

  • the frequency range and resolution
  • force & exponential window settings
  • number of averages per measurement point
  • auto reject double impacts and overloads
  • use of Prosig remote keypad

Modal Analysis Suite

The DATS Modal Analysis suite is provided for analysts who want to determine Modal Frequencies, Damping Factors & Modal Amplitudes from either measured frequency response functions, impulse response functions or from response-only data.

A variety of frequency and time domain identification methods are provided for the extraction of these parameters. These include Half-Power methods, SDOF, MSDOF, MDOF and ERA-DC. The identified mode shapes can be displayed and animated using the DATS Structural Animation package. A synthesis module is provided to enable Frequency Response Functions (FRF) to be regenerated from the identified parameters thereby revealing the accuracy of the modal model fitting. Forced responses can also be predicted by convolution of the regenerated FRFs with either simulated or known force inputs.

Structural Animation Software

How is it vibrating? Use Structural Animation with either frequency data or time data to visualize the vibration patterns.

Frequency Animation uses the magnitude and phase of FFTs, Frequency Response Functions (FRFs) or cross spectra at each measurement position on the structure to reveal the motion at different frequencies. Time Animation takes time based data and uses it to directly show the true position at each measurement point at each time step. The model may be created using the fully featured 3D editor provided with the Structural Animation software. Models can also be imported from NASTRAN, CSV and Universal files.

Video

Inlet manifold sound map

NVH

Race car exhaust structure

NVH

Everything you need to capture and analyze modal frequency response data

Features

  • Frequency Response Functions
  • Structural Response Measurements
  • Double Impact Detection
  • Accept/Reject by User
  • Automatic Averaging
  • Experimental Modal Analysis (EMA)
  • Operational Modal Analysis (OMA)
  • Modal Parameter Identification
  • Alternative Curve Fitting Algorithms:
    • SDOF
    • MSDOF & MDOF (Frequency Domain)
    • ERA-DC (Time Domain)
  • Stability Diagram
  • FRF Synthesis from Modal Parameters
  • Forced Response Prediction
  • Animate v Frequency
  • Animate v Time
  • Full 3D Views
  • Sophisticated Model Editor

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Related Case Study

  • Measuring For Success – Case Study

    While contesting the UK Formula Ford 1600cc championship, the Prosig sponsored Dalmeny Racing Formula Ford Team suffered several minor structural failures on a particular part of an exhaust pipe mount. A P8020 and Prosig’s DATS software were used to investigate further.

    Read more

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