Vibration Fundamentals Training [VFT]

Vibration Fundamentals Training System (VFT)

Hands-On Turnkey System for Teaching Vibration Fundamentals

28201 Hermitage Rd, Richmond, VA 23228 1-804-261-3300 www.spectraquest.com

Vibration Fundamental Training System (VFT)

An integrated turnkey system with simulation software, guided hands-on experiments, data acquisition and signal analysis

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Simulation Hands-on experiments Data Acquisition and analysis


VFT Benefits

Clarify difficult concepts of vibration theory by performing hands-on controlled experimentsValidate theoretical predictions of natural frequencies, mode shapes, and frequency response as a function of frequency, boundary conditions, geometry, and materialsValidate theoretical concepts by comparing experimental results with the computer simulation of the vibration theoryDetermine the detrimental effects of vibration load transmission to the support structure and component fatigue lifeLearn to control vibration amplitude using tuned mass dampers and damping treatments Learn vibration measurement transducers, signal processing, dataacquisition and data analysis


VFT Features

Fully integrated turn-key package consisting of comprehensive experimental device, data acquisition instrumentation, analysis software, transducers, course curriculum, exercise book, and simulation software for virtual experimentation Robust, user friendly, modular, and compact bench-top device for performing controlled experimentsExperimental setup for single and two-degrees of freedom spring-mass system (with and without damping), torsional vibration, andtuned-mass-damperFull experimental setup for beams with different boundary conditions, material, geometry, and length to understand effects on natural frequency and mode shapesUser friendly software with pre-defined experiments integrated with data acquisition and data analysis


VFT Experimental Capabilities

VFT is capable of a wide range of experiments covering all vibration concepts

Lumped System Experiments Simple pendulum Spring-Mass-Damper system: 1 & 2 DOF

Free and forced vibrationDamped and undamped vibrationViscous damping calculationTransient vibrationVibration transmissibilityFrequency Response Function (FRF)

Torsional Ssystem: 1 to 3 DOF

Vibration Control Experiments Spring-Mass vibration absorber Beam vibration absorber Viscoelastic Layer Damping (VLD) sandwich structure Constraining Layer Damping (CLD) sandwich structure

Continuous System Experiments Beam with different boundary conditions

Free and forced vibrationDamped and undamped vibrationTransient vibrationVibration transmissibilityFrequency Response Function (FRF)Modal analysis Operating Deflection Shape (ODS)


VFT Simulator

Consists of five individual modules

Pendulum (not shown)

Spring-Mass-Damper Torsional Vibration Beam Vibration Vibration Control


Pendulum Module

Possible ExperimentsInfluence of mass and inertia on natural frequencyVibration characteristics of thread pendulumEquivalent mass calculations

Available HardwareOne pendulum of adjustable length3 weights


Spring-Mass-Damper Module

Possible Experiments1-DOF free and forced vibration, with or without damping2-DOF free and forced vibration, with or without dampingDamping effect comparisons and measurement of viscous fluidRotating unbalanceBase excitationFrequency Response Function (FRF) measurementDisplacement and force transmissibility



Available Hardware3 different stiffness springs, stackable for 2 DOF3 stackable mass blocks1 dashpot with 3 types of viscous fluid 1 proximity probe for displacement vibration measurement1 unbalanced motor with controller for excitation 1 force transducer for transmissibility study (optional)


Torsional Vibration Module

Possible Experiments1-DOF free and forced vibration, with or without damping2-DOF free and forced vibration, with or without dampingDamping effect comparisons and measurement of viscous fluidFrequency Response Function (FRF) measurement



Available Hardware3 rods of different diameters 3 discs of different mass and inertia1 dashpot with 3 types of viscous fluid (optional)4 accelerometers for torsional vibration measurement1 unbalanced motor with controller for excitation


Beam Vibration Module

Possible ExperimentsFirst three natural frequency and modal shape Free and forced vibration responseInfluence of boundary condition: cantilever, simply supported, overhungInfluence of beam lengthOperating Deflection Shape (ODS) study



Available Hardware3 beams: two thickness steel, one aluminum, one plastic2 end supports configurable as cantilever or simply support4 mass blocks 4 accelerometers1 unbalanced motor with controller for excitation


Vibration Control Module

Possible Experiments Spring-Mass vibration absorberBeam vibration absorberBeam with free layer damping (viscoelastic)Beam with constraining layer damping (CLD) study



Available Hardware for Spring-Mass Absorber3 different stiffness springs3 stackable mass blocks1 proximity probe for displacement vibration measurement1 unbalanced motor with controller for excitation

Available Hardware for Beam Absorber4 mass blocks 4 accelerometers1 unbalanced motor with controller for excitation1 tuned mass damper beam

Available Hardware for Layer Damping3 beams: one base, one viscoelastic (FLD), and one Constrained Layer Damping (CLD)


Simulation/Animation Software

Basic concepts simulated in user selected input parameters Vivid visualization to enhance learning and clarification Input condition controllable by user


All Major Vibration Concepts


Topics CoveredSimple harmonic motion as represented by a Spring-Mass systemSinusoidal relationship of amplitude, velocity and accelerationMathematical modeling of dynamical system using equivalent mass and springFree vibration of undamped, underdamped and overdamped systemsLogarithmic decrementHarmonic excitation of undamped, underdamped systemsFrequency response functionRotating UnbalanceBase excitation - Displacement transmissibility and force transmissibilityTorsional vibrationTransient response of underdamped systems - Step input and impulse inputCombined vibration - Harmonic excitation with initial displacement and velocityGeneral forced response - Delayed step input and rectangular pulse inputTwo degrees of freedom system - Free vibrationTwo degrees of freedom system - Harmonic excitationTuned mass damperBeam vibration



For each topics covered, the simulation software includes a theoretical summary along with all key equations for quick reference Most topics also include a predefined hands-on experiment to be performed on VFT


DAQ and Analysis Software

8 simultaneous channels DAQ hardware Excitation motor control fully integrated with DAQ, capable of sine sweepingTime waveform, spectrum, and frequency response signal analysisPre-defined experimental and data collection for easy setup or fully customizable data collection


Experimental Curriculum Book

Comprehensive experimental bookMore than 20 pre-designed experimentsStep by step detailed instructionExtended exercises help student learning


Specifications


Hardware for mass-spring absorber, and hardware for beam absorber

Tuned mass damper

One damper and three fluids (optional)Damper

One viscoelastic layer and one constrained layerBeam with damping treatment

Three rotors of different mass and inertiaRotor

Three different diametersShaft


One dashpot and three fluidsDamper

Three weights, stackable Mass

Three different stiffness, stackable for 2 DOFSpring


Adjustable length and weightPendulum

Pendulum Vibration Module

Four rubber feetVibration isolation

Software driven variable speed motor with built-in unbalance load. Manually driven variable speed motor with built-in unbalance load. (optional)

Excitation motor

100 lb (45 Kg)Weight

30”w x 35”h x 15”d (75cm x 90cmx 40cm)Dimensions

Base VFT

110 V/220 V 50/60HzPower Source

Electrical

(optional)Beam support force transducer

One each includedStroboscope and proximity probe

Three 0.3-10KHz, 100mV/G with BNC connectorAccelerometer

Transducers

Time waveform, spectrum, FRF, motor controlDAQ and analysis software

Software

16 bit resolution, simultaneous sampling, analysis frequency 5kHz, anti-aliasing filter, software selectable IEPE sensor power supply, AC-DC coupling, programmable gain of 1, 2, 5, 10, +-10V input

DAQ specifications

8 Channels

Data Acquisition

User configurable: cantilever or simply supported, adjustable length

Supports

Three weight blocksMass

Two thickness steel, one aluminum, one plasticBeam


Content of presentation is subject to change without any notice

Vibration Fundamentals Training [VFT]

Education

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