Features

3D Modeling & Display

• Quad View (front/back, top/bottom, left/right, and 3D views).
• Interactive rotation & elevation in the 3D view.
• Auto rotation in the 3D View.
• Interactive zoom, pan, rotation, and perspective distance.
• Surfaces with color fill, transparency, and surface textures.
• Surface textures imported from digital photographs.
• Lighted surfaces.
• Drawing Assistant for rapidly building structure models using rectangular, cylindrical & spherical coordinates. Includes sizing, no. of points, positioning, revolve, extrude, and a substructure palette with pre-defined substructures.
• Interactive drawing tools. Select & drag objects on screen, resize, rotate, and stretch objects to rapidly build a structure model.
• Cut, Copy & Paste of drawing objects.
• Measurement Axes (rectangular, cylindrical, spherical & machine), graphically oriented at each point.
• Interactive point numbering.
• Measurements displayed on the model.
• Imports structure models from UFF, AutoCAD (DXF), STL, FEMAP, NASTRAN & ANSYS files.

Shape Animation

• Interactive shape animation directly from time or frequency domain measurements, using a line, peak, or band cursor.
• Interactive shape animation directly from a Shape Table.
• Interpolation of shape data for unmeasured points using data from neighboring measured points.
• Animation in Quad view or a Single view.
• Display of two shapes (side-by-side & overlaid) from two sources (Data Blocks or Shape Tables).
• Shape contour colors (including nodal lines).
• Shape animation of scalars or vectors (translations & rotations).
• Deformed & un-deformed structure displayed together.
• Speed & amplitude controls.
• Display of maximum deflection points & shape values.
• Display of shape values at selected (monitored) points.
• Animation using arrows.
• Animation with persistence.
• Animation in selected directions.
• Animation from selected references in multiple reference data.
• Print & Copy to Clipboard.
• Digital Movies, documents animation as an AVI file.

Measurement Display

• Displays time or frequency domain measurements.
• Imports PC disk files saved by popular multi-channel data acquisition systems, analyzers, recorders & collecto
• Imports & exports UFF, ASCII Spreadsheet, MATLAB, DADiSP & MS WAV file formats.
• Displays up to 100 measurements in Row/Column, 10 in Strip Chart, an unlimited number in Overlay, Cascade, & Color Map formats.
• Real, Imaginary, Magnitude (Linear, Log, dB), Phase, CoQuad (Real & Imaginary), Bode (Magnitude & Phase), Nyquist (Real vs. Imaginary).
• Horizontal & vertical zoom with scrolling.
• Line, Peak & Band Cursors.
• Grid lines, labels, DOFs, units & cursor values displayed on each measurement.
• Spreadsheet for editing measurement properties (select, show/hide, color, line types, DOFs, units, labels, etc.)
• Play button, plays the sound of each measurement.
• Measurement statistics.
• Auto, relative & fixed vertical axis scaling.
• Maximize vertical axis display.
• Linear & Log horizontal axis.
• Print & Copy to Clipboard.
• Text font, window, background, fill, text color & line type.

Direct Data Acquisition

• Connects to most popular multi-channel acquisition front ends.
• Front end sampling, triggering, sources & measurements selected from tabs.
• Front end channel parameters, windowing, etc. setup in a spreadsheet.
• Displays both acquired time domain and calculated frequency domain waveforms.
• Scope mode for looking at front end time domain waveforms.
• Displays un-windowed and windowed front end waveforms.
• Impact force & exponential windows.
• Accept/reject controls for impact testing.
• Outputs multiple shaker random (burst random), chirp (burst chirp) signals for selected front end hardware.
• Calculates MIMO FRFs, Multiple & Partial Coherences, Auto & Cross Spectra, ODS FRFs.
• Measurement points & directions graphically indicated on a connected structure model.
• Measurements accumulated into a connected Data Block.

Acoustics

• Animated display of vibro-acoustic (acoustic & vibration) data.
• Displays narrow band or 1/1, 1/3rd, 1/12th, 1/24th octave band measurements.
• Displays measurements in Linear, Log, dB, dB Reference.
• Acoustic Intensity calculated from Cross Spectrum or time domain data.
• Sound Power through a surface calculated from Intensity data.
• Converts narrow band measurements to octave band.
• A, B & C weighting of narrow band or octave band measurements.
• Noise source ranking based on percentage, dB, or watts.
• Magnitude & phase tone calibration.

Signal Processing

• Simultaneous FFT & IFFT on all measurements in a Data Block. (Not restricted to powers-of-2 number of samples.)
• Integration & differentiation of time or frequency signals.
• Waveform Cut, Copy & Paste.
• Notch & Band windows for removing unwanted data.
• Exponential window for removing noise or sharpening resonance peaks.
• Calculates Fourier Spectra, Auto Spectra, PSDs & ODS FRFs from time domain operating data, using Hanning, Flat Top, or Rectangular windows, triggering, linear or peak spectrum averaging, overlap processing.
• Calculates ODS FRFs from Auto & Cross Spectra.
• Displays Order Tracked ODS’s from multi-channel Order Tracked response data.
• Block Math functions (scale, add, multiply, conjugate, etc.)
• Linear (RMS) to Power (MS) units conversion.
• Peak, Peak to Peak, RMS scaling.

Modal Analysis

• SDOF Co-Quad & Peak curve fitting.
• MDOF Polynomial curve fitting, with compensation for out-of-band modes.
• Local or Global curve fitting.
• Quick Fit command, one step curve fitting with minimum user interaction.
• Interactive curve fitting using selected measurements and a band cursor.
• Mode Indicator functions with resonance peak counter.
• Frequency & damping estimates overlaid on Mode Indicator graph.
• FRFs synthesized from modal parameters.
• All curve fitting functions and modal parameters saved with each measurement.
• Imports & exports modal parameters in UFF format

Multi-Reference Modal Analysis

• MDOF Z-Polynomial curve fitting.
• MDOF Complex Exponential curve fitting.
• MDOF ERA (Eigenvalue Realization Algorithm) curve fitting.
• Multiple Reference curve fitting.
• Stability diagram. Graphical display of frequencies & damping for a range of curve fitting model sizes.
• CMIF (Complex Mode Indicator Function), indicates closely coupled modes & repeated roots.
• MMIF (Multivariate Mode Indicator Function), indicates closely coupled modes & repeated roots.
• Modal Assurance Criterion (MAC), numerical shape comparison.
• Shape Complexity plot.
• Shape component Magnitude ranking.

MIMO Modeling & Simulation

• MIMO Forced Response. Calculates multiple response time or frequency waveforms from FRFs (or modes) and multiple excitation force waveforms.
• MIMO Sinusoidal Forced Response. Calculates and displays response shapes due to multiple sinusoidal excitation forces.
• MIMO Forces. Calculates multiple excitation force time or frequency waveforms from FRFs (or modes) and multiple response waveforms.
• Calculates MIMO FRFs or Transfer Functions, and Ordinary or Multiple & Partial Coherences from multiple excitation & response time waveforms, using Hanning, Flat Top, or Rectangular windows, triggering, linear or peak averaging, overlap processing.
• Calculates MIMO FRFs, Transfer Functions, and Coherences from Auto & Cross Spectra.

Structural Modifications

• Interactive graphical addition of modification elements to a structure model.
• Displays modification elements on the structure model.
• Point mass, linear spring & linear damper elements.
• Rod & beam elements.
• Triangular & quadrilateral plate elements.
• Tetrahedron, prism & brick solid elements.
• Spreadsheets for finite element properties.
• Modal sensitivity analysis.
• Substructuring (connecting together two or more structures using finite elements).
• Tuned absorber (mass, spring, damper element).
• Scaling of operating modes.

Experimental FEA

• FEA Assistant. Populates a geometric model with finite elements. Includes material & geometric property lists.
• Calculates Normal Modes for up to 20,000 DOFs.
• Calculates Complex Modes (with damping) for up to 2000 DOFs.
• Shape Expansion. Calculates unmeasured shape DOFs using FE model and response measurements at a few DOFs.