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Packages

VT-620 Visual ODS

An ODS shows how your machine or structure is moving, and whether or not there are excessive vibration levels.  ME'scopeVES has been specifically designed to make it easier for you to observe and analyze a variety of vibration and acoustics problems in machines and structures.  By animating the ODS's of a structure in slow motion, you can see what can't be seen any other way; a structure's overall motion and the motion of one part relative to another.  Excessive vibration levels and loose or damaged parts are easily identified from an ODS display. 

Visual ODS lets you see how a machine or structure is moving by animating ODS's directly from a set of time domain of frequency domain experimental data. 

As an example of the practical use of Visual ODS, a blower fan located on the roof of a building was experiencing severe vibrations, throwing off belts, and creating high noise and vibration levels throughout the building.  All attempts to balance the fan had not solved the problem.

A set of ODS data was taken while the fan was running, using a single channel analyzer with a tachometer signal.  A set of Peak & Phase data at the operating speed of the motor was acquired.  The animating ODS shows that the base of the motor at the end opposite the belt was moving out of phase with the motor .  Removing some paint from the base of the motor revealed a previously undetected crack in the motor mount.  After repairing the crack, the fan was re-balanced and the severe vibration and noise problems were eliminated.

VT-420 Visual ODS Pro

Visual ODS Pro includes all of the features of Visual ODS, plus VES-300 Signal Processing which provides advanced signal processing and analysis features.  Visual ODS Pro includes an FFT for analyzing data in either the time or frequency domain.  If also contains the unique capability to process operating (response only) data to obtain a set of ODS FRFs measurements.  ODS's can be displayed directly from a set of ODS FRFs.  They can also be curve fit (using a Visual Modal option) to obtain operating mode shapes.

VT-570 Visual Modal

Visual Modal includes all of the features of Visual ODS Pro, plus VES-400 Modal Analysis which provides features for processing vibration measurements to obtain modal parameters.  With Visual Modal you can identify the frequency, damping & mode shape of the modes of a structure from experimental data.

VT-550 Visual Modal Pro

Visual Modal Pro adds advanced features to Visual Modal adding both VES-350 Advanced Signal Processing and VES-450 Advanced Modal Analysis.

Visual Modal Pro includes advanced curve fitting methods like Multiple Reference curve fitting.  This gives you the power to isolate repeated roots or closely coupled modes.  Visual Modal Pro also includes advanced processing features such as MIMO Analysis.  With MIMO Analysis you can calculate Multiple Reference FRFs even if your analyzer does not include this functionality.

For example, a bridge in Europe was tested using multiple shakers.  Using Visual Modal Pro, the acquired time domain force and response data was post-processed to calculate a set of multiple reference FRFs.  The resulting FRFs were the curve fit and the mode shapes of the bridge displayed in animation. A typical mode shape display is shown here.

VT-560 Visual SDM

Visual SDM includes all of the features of Visual Modal Pro, plus VES-500 Structural Modifications.

Once you've determined that there is a resonance problem in your machine or structure, the next question is, "How can the problem be fixed?" 

Visual SDM helps you investigate alternative solutions to resonance problems.  Visual SDM includes all of the ODS and modal analysis features of Visual Modal Pro, plus it adds additional tools for investigating structural modifications.  The Structural Dynamics Modification (SDM) method lets you simulate the effects that a variety of potential modifications will have on the resonances of a structure without having to actually make them.

The resonances (modes) of a machine or structure depend on its physical properties (geometry, density, elasticity, boundary conditions, etc.).  Changing the physical properties by adding brackets, stiffeners, tuned absorbers or other modifications, will affect the modes.  Using Visual SDM, modifications are modeled using standard finite elements such as springs, masses, bars and plates.  Then, using the mode shapes of the original (unmodified) structure, SDM calculates a new set of mode shapes for the modified structure.

For example, a stiffener was added across the bottom of an aluminum panel.  Adding the stiffener replaces the first mode of the structure (a bending mode at 73Hz) with a torsional mode at 94Hz.  The torsional mode was the second mode of the unmodified structure but was not affected by the rib stiffener.  Without the stiffener, machinery operating at 4000-4500 RPM would excite the first bending mode of this panel causing it to resonate.  Adding the stiffener not only eliminated the first mode at 73Hz, but also removed another mode at 143Hz, thus removing a potential resonance problem at 2X RPM as well.

VT-580 Visual SDM Pro

Visual SDM Pro includes all of the features of Visual SDM, plus VES-550 Advanced Modifications.  This adds advanced Experimental Finite Element features to Visual SDM.  With Visual SDM Pro you have even more power for investigating the effects of structural modifications.

Vibro-Acoustic Packages

VT-750 Visual Vibro-Acoustics Pro

VT-550 Visual Modal Pro plus VES-600 Acoustics

VT-850 Visual STN

VT-560 Visual SDM plus VES-600 Acoustics

VT-860 Visual STN Pro

VT-550 Visual SDM Pro plus VES-600 Acoustics

The ME'scopeVES acoustic package add acoustics capability to the Visual Modal Pro, Visual SDM and Visual SDM Pro packages.  They provide you with the tools necessary to analyze both vibration and acoustic problems in structures or machinery and correlate surface vibrations with acoustic measurements.  With acoustics, you can display and post-process Acoustic Intensity and Sound Pressure Level (SPL) data, calculate the P-I Index, and perform a variety of others tasks.

All packages include:

  • Interactive 3D Structure Modeling
    • Drawing Assistant helps you rapidly build 3D models of test structures.  Pre-built and user defined structures can also be used.
    • On screen sizing, shaping, positioning and rotation of 3D drawing objects (points, lines, surfaces, substructures)
    • 4 views of the 3D model can be displayed together (view along the X, Y, & Z axes plus a user interactive 3D view).
    • Zoom, Pan, View Rotation and Perspective controls.
    • Cut, Copy and Paste of all drawing objects.
    • Copy to and paste from the Windows Clipboard so Point Coordinates can be easily edited.
    • 2D Structure outlines can be traced from digital photos or drawings.
    • Each point in the 3D model can have its own measurement axes (in Rectangular, Cylindrical, Spherical or Machine coordinates).  Measurement axes can be graphically oriented at each point to match transducer measurement directions.
    • Structure models can be imported from UFF, AutoCAD DXF, or popular Finite Element package formats.
    • No limits on Model Size.
  • Time and Frequency Domain Measurements
    • Data from most popular single or multi-channel analyzers, tape recorders, data acquisition systems and portable data collectors can be imported.
    • All popular types of time and frequency domain measurements can be imported.
    • Each Data Block of measurement data can contain thousands of measurements with millions of samples of data per measurement.
    • Measurement data can be displayed as Real, Imaginary, Magnitude (Linear, Log, dB), Phase, CoQuad (Real & Imaginary), Bode (Magnitude & Phase), Nyquist, Nichols or Orbit Plots.
    • Up to 100 measurements can be displayed together in a (10x10) Row/Column format, or up to 10 measurements in a Strip Chart.
    • No limits on the number of measurements or the number of samples per measurement.
    • Measurements can be displayed in an Overlay, Cascade and Color Map display.
    • Line, Peak and Band Cursors are available.
    • The measurement display can be Zoomed horizontally or vertically, with Scrolling.
    • Graphics can be copied to the Clipboard as either a Bitmap or Metafile.
  • Shape Data
    • Imports Peak & Phase data for animation of order related ODS's.
    • Imports Mode Shapes from Finite Element Models.
  • Animation of ODS's
    • Interactive sweep, dwell, or static display of ODS's directly from time or frequency domain measurements, using the Line, Peak or Band Cursors.
    • Interactive sweep, dwell, or static display of shapes directly from a shape data table.
    • Automatic interpolation of shape values for all unmeasured DOFs using data from nearby measured DOFs.
    • Comparison display of ODS's from two sources (Data Blocks or Shape Tables) in Side-by-Side or Overlaid format.
    • Animated display using Deformation, Arrows, Text values, or Contour Lines (including Node Lines) or Contour Color Fill.
    • Animation with persistence for displaying orbits.
    • Hidden Line display (either Dashed or Invisible Lines).
    • Colored Surfaces.
    • Create a Digital Movie (recording) of any animation using Microsoft AVI files.

With ME'scopeVES, looking at ODS's is as easy as moving a cursor through your measurements and observing an animated display of your data.  ME'scopeVES can sweep through a set of time histories and animate the response of a structure, or show the structure's behavior while dwelling at a time, frequency or machine order.

ME'scopeVES has been specifically designed to make it easy for you to observe and analyze a variety of vibration, acoustic, and strength of materials problems in machines and structures.  It utilizes multi-channel time or frequency domain experimental data, acquired during the operation of a machine, or the static or dynamic loading of a structure.

 

ME'scopeVES has a package or option combination available to meet your needs and budget.

Vibration Packages

  • Visual ODS - Our entry level package.  Import time or frequency data and see how your structure is moving.

  • Visual ODS Pro - All the features of Visual ODS, plus additional signal processing features to help show how much your machine or structure is really moving.

  • Visual Modal - All of the features of Visual ODS Pro, plus modal parameter estimation so you can look at resonances.

  • Visual Modal Pro - All of the features of Visual Modal, plus advanced modal parameter estimation tools to let you look at complex problems and MIMO analysis tools to let you look at the effects that changes in operating loads will have on the dynamic behavior of your equipment.

  • Visual SDM - All of the features of Visual Modal Pro, plus Structural Modifications, which lets you test changes to you equipment before you actually make them. Structural Modifications lets you test whether a change is likely to help solve a vibration problem.

  • Visual SDM Pro - All of the features of Visual SDM, plus finite element functionality.  Use your measured data, along with finite elements to estimate the stresses and strains within your structure. 

Vibro-Acoustics Packages

  • Visual Vibro-Acoustics Pro - All of the features of Visual Modal Pro plus Acoustics.  See how your structure moves and look at its resonances, plus look at the sound intensities around your structure.

  • Visual STN - All of the features of Visual SDM plus Acoustics

  • Visual STN Pro - All of the features of Visual SDM Pro plus Acoustics.  Our most powerful package