vibration fundamentals training [vft]
TRANSCRIPT
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
+ +
Simulation Hands-on experiments Data Acquisition and analysis
38201 Hermitage Rd, Richmond, VA 23228 1-804-261-3300 www.spectraquest.com
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
48201 Hermitage Rd, Richmond, VA 23228 1-804-261-3300 www.spectraquest.com
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
58201 Hermitage Rd, Richmond, VA 23228 1-804-261-3300 www.spectraquest.com
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)
68201 Hermitage Rd, Richmond, VA 23228 1-804-261-3300 www.spectraquest.com
VFT Simulator
Consists of five individual modules
Pendulum (not shown)
Spring-Mass-Damper Torsional Vibration Beam Vibration Vibration Control
78201 Hermitage Rd, Richmond, VA 23228 1-804-261-3300 www.spectraquest.com
Pendulum Module
Possible ExperimentsInfluence of mass and inertia on natural frequencyVibration characteristics of thread pendulumEquivalent mass calculations
Available HardwareOne pendulum of adjustable length3 weights
88201 Hermitage Rd, Richmond, VA 23228 1-804-261-3300 www.spectraquest.com
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
98201 Hermitage Rd, Richmond, VA 23228 1-804-261-3300 www.spectraquest.com
Spring-Mass-Damper Module
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)
108201 Hermitage Rd, Richmond, VA 23228 1-804-261-3300 www.spectraquest.com
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
118201 Hermitage Rd, Richmond, VA 23228 1-804-261-3300 www.spectraquest.com
Torsional Vibration Module
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
128201 Hermitage Rd, Richmond, VA 23228 1-804-261-3300 www.spectraquest.com
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
138201 Hermitage Rd, Richmond, VA 23228 1-804-261-3300 www.spectraquest.com
Beam Vibration Module
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
148201 Hermitage Rd, Richmond, VA 23228 1-804-261-3300 www.spectraquest.com
Vibration Control Module
Possible Experiments Spring-Mass vibration absorberBeam vibration absorberBeam with free layer damping (viscoelastic)Beam with constraining layer damping (CLD) study
158201 Hermitage Rd, Richmond, VA 23228 1-804-261-3300 www.spectraquest.com
Vibration Control Module
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)
168201 Hermitage Rd, Richmond, VA 23228 1-804-261-3300 www.spectraquest.com
Simulation/Animation Software
Basic concepts simulated in user selected input parameters Vivid visualization to enhance learning and clarification Input condition controllable by user
178201 Hermitage Rd, Richmond, VA 23228 1-804-261-3300 www.spectraquest.com
All Major Vibration Concepts
Simulation/Animation Software
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
188201 Hermitage Rd, Richmond, VA 23228 1-804-261-3300 www.spectraquest.com
Simulation/Animation Software
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
198201 Hermitage Rd, Richmond, VA 23228 1-804-261-3300 www.spectraquest.com
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
208201 Hermitage Rd, Richmond, VA 23228 1-804-261-3300 www.spectraquest.com
Experimental Curriculum Book
Comprehensive experimental bookMore than 20 pre-designed experimentsStep by step detailed instructionExtended exercises help student learning
218201 Hermitage Rd, Richmond, VA 23228 1-804-261-3300 www.spectraquest.com
Specifications
Vibration Control Module
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
Torsional Vibration Module
One dashpot and three fluidsDamper
Three weights, stackable Mass
Three different stiffness, stackable for 2 DOFSpring
Spring-Mass-Damper Module
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
Beam Vibration Module
Content of presentation is subject to change without any notice