Universal Vibration Apparatus, Universal Vibration Apparatus Equipments, Universal Vibration Apparatus Tools, Universal Vibration Apparatus Tool Kits, Universal Vibration Apparatus Manufacturers, Universal Vibration Apparatus Suppliers from India, China, Kenya
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The Simple Pendulum oscillates on a knife-edge bracket attached to the wall at a convenient height.
The Simple Pendulum mass can be adjusted to any position along the pendulum cord length, quickly and easily. Set-up time is minimal for excellent results.
A Simple Pendulum consisting of a cord with a ring at the top end and a sliding pendulum mass.
A stopwatch and ruler are supplied to time the swing of the pendulum and to measure its length.
Experimental Capabilities:
To show that the periodic time of swing is proportional to the square root of the pendulum length
To determine the gravitational acceleration 'g'.
Reversible Pendulum Apparatus can be suspended from either pivot and swung. The two pivots are adjustable on the rigid metal bar and this allows the periods of swing to be adjustable. The Reversible Pendulum Apparatus consists of a rigid metal bar with two pivot points, one near each end of the bar.
The movable pivot is adjusted until the two periods are equal. From the period and the measured distance between the pivots, the acceleration of gravity can be calculated with great precision. In use, it is swung from one pivot, and the period timed, and then turned upside down and swung from the other pivot, and the period timed. At this point the period is equal to the period of an ideal simple pendulum of length equal to the distance between the pivots.
Experimental Capabilities:
To find the acceleration due to gravity 'g'
Investigate the effect of fulcrum position.
The Natural Vibration on a Ship model can be used tomeasure and record the natural frequencies and modes of a model ship. Thesimple, idealised ship shape makes it easier to approach the problemmathematically. The experiment-basedvibration analysis is an essential component in shipbuilding design anddevelopment. The plastic model ship has nine ribs and an elliptical lineplan. The model ship is attached to a rigid cross-member by springs. Theenclosed box cross-section with high rigidity means the natural frequency ofthe cross-member is negligibly high. The Natural Vibration on a Ship model unit helps studentstake their first steps in the field of experimental vibration analysis or modalanalysis of structures. Using this trainer, the dynamic behaviour of a shipstructure is studied, teaching students the fundamentals of experimentalvibration analysis. Inthis manner, the transfer functions for various points of the model ship can begenerated step by step. These can be used to determine the vibration modes forvarious natural frequencies. An electrodynamic vibration exciter causesthe model ship to vibrate. A function generator produces the excitation signal,which can be adjusted in amplitude and frequency. An arbitrarily positionableacceleration sensor measures the models response to the excitation signal.
Features:
Simple shipform simplifies the mathematical approach
Differentexcitation signals possible
Dynamicbehaviour of a ship structure
Optionalexcitation and measuring points.
Dynamic friction is differentiated into sliding, rolling and spinning friction. In dynamic friction, there is relative translation between the two bodies. In bearing and drive technology, dynamic friction occurs at the sliding and rolling points, which leads to power losses in the technical systems.
Learning Objectives:
Frictional forces with different lubrication
Frictional forces at different relative speeds of the friction partners
Wear under different friction parameters
Together with the drive unit
Frictional forces in different friction pairs and loads.
Features:
Investigation of wear
Use of different lubricants possible
Frictional forces between two sliding friction pairs.
Friction is the resistance of a body against movement on a base. Self-excited friction oscillations, also known as slipstick phenomenon, occur if the static friction is significantly higher than the dynamic friction. Static friction means that a body remains at rest under the action of a force. If a limit value is exceeded, the body begins to move on the base, resulting in dynamic friction.
Learning Objectives And Experiments:
Observation of the transition from static to dynamic friction
Together with the drive unit
Influence of the relative velocity of the friction partners on the slipstick phenomenon
Influence of the force between the friction partners on the slipstick phenomenon
Influence of lubrication on slipstick phenomenon.
Features;
Friction rings of different materials for the study of different friction pairings
Slip Stick phenomenon at the transition from static to dynamic friction.
The bending beam can be used vertically standing or hanging and in the horizontal position in the mounting frame. An oscillator, which is left alone after a single excitation, performs free vibrations. In this, a bending beam is used as the systems oscillator. The frequency of the free vibration is the natural frequency of the oscillator.
Learning Objectives And Experiments:
Determine the natural frequency according to Rayleigh
Free vibration in a vertical and horizontal bending beam
How clamping length and mass affect the natural frequency.
Features:
Approximation method according to Rayleigh.
Natural frequency on the freely vibrating bending beam.
Mechanical vibrations are usually found as an unwanted side effect in many areas of engineering. Examples include vehicle vibrations on uneven roads or engine vibrations. Vibration theory is a particularly challenging area in the field of mechanics.
Learning Objectives And Experiments:
1. Damped and undamped resonance
2. Absorber effect in multi-mass oscillators
3. Experiments with pendulums
Reduced pendulum length
Spring-mass system
Katers pendulum
4. Bar-type oscillator
Forced vibration
Undamped oscillation
Damped oscillation
Features:
Detailed, wide-ranging series of experiments on the mechanical vibration theory
Experiments on various pendulums, bar-type oscillators and spring-mass systems
Damping, resonance and absorber effects in forced vibrations.
The resistance that the spring presents opposite of the elastic deformation is known as spring stiffness. It is a characteristic variable of the spring. In helical springs, the spring force is generated by the elastic deformation of a metal band wound in an Archimedean spiral. If a mass is attached to the spring, we refer to it as a springmass system.
Features:
Torsional oscillations of a spring-mass system.
Mass Spring System are added to the lower end of the spring to vary the frequency of oscillation. Frequency, periodic time and deflection can be measured. Experimental module, which fits into the Vibrations Frame making up part of the Universal Vibration Apparatus. Loading is achieved through the use of various masses. An upper adjustment system allows the springs vertical position to be varied and thus its deflection increased and decreased. An open helical spring is mounted inside the Vibrations Frame and free to vibrate vertically through a linear bearing guide.
Experimental Capabilities:
Measures periodic time and deflection. Open helical springs mounted and free to vibrate vertically loaded by various masses.
Modular based experiment making up part of the Mass Spring System
All elements mount within the frame.
Experiment software supplied with the apparatus simulates an oscilloscope, allowing parameters such as phase angle, excitation frequency and displacement to be viewed. The experiment transducers are wired into the using front mounted BNC sockets. The parameters are fed into the system via the experiment sensors, i.e. proximity sensor, LVDT. Data Acquisition System is quick and easy to set up and connects to the host pc using a USB connection.
This unique and compact Data Acquisition System is an essential accessory for the Universal Vibrations Apparatus experiments. When connected to the relevant experiment and its sensors, the system allows measuring, capturing, storing and analysing of experiment data.
A flexible beam is supported between two end brackets which create simply supported end conditions. One end bracket allows pivoting only whilst the other allows rolling and pivoting only. Experimental module, which fits into the Vibration Frame making up part of the Universal Vibration Apparatus. The vertical brackets and standard length beam are both supplied. One of the brackets is supported on vertical supports that can be moved depending on the beam length being used.
The Beam Bending Vibration Module is forced to vibrate using a motor exciter. This allows high rotational speeds to be achieved. A speed sensor on the motor exciter monitors the speed of rotation of the eccentric masses and outputs Beam Bending Vibration Module. The motor exciter is supplied as standard and has two eccentric masses attached directly to the motor spindle at either end. This motor exciter can be attached anywhere along the beam length between the brackets.
Experimental Capabilities:
Forced vibration of a simply supported beam Natural frequency of oscillations
Resonance
Free vibration of a simply supported beam
Phase lag
Amplitude of vibrations.
Tachometer Apparatus unit display the excitation frequency (in Hz) of the motor exciter being used to excite the beam. A bench top unit that operates in conjunction with the Universal Vibration System. The digital display shows the excitation frequency in units of Hz and to a resolution of 1 decimal place. This module will operate with both the and motor exciter.
Tachometer Apparatus also processes the signals from these sensors and outputs them to two BNC sockets on the rear panel. The connects to the so that the motor exciters can be speed controller. The requires its supply voltage The supplies power to the LVDT sensor and the speed sensor of the motor exciters. This then allows easy connection to an oscilloscope or Data Acquisition System The unit can be operated from either an 115V/230Vac supply, 60/50Hz.
The Torsional Vibration Equipment provides a basic range of Torsional Vibration Equipment. Steel and brass rods of two different diameters are included. A wire rod clamped in a wall mounted bracket has a heavy disc attached to the lower end. A solid ring can be located over the disc to increase its inertia. All brackets, clamps and adapters are supplied.
Torsional Vibration Equipment is part of a range designed to both demonstrate and experimentally confirm basic engineering principles. Setting up time is minimal, and all measurements are made with the simplest possible instrumentation, so that the student involvement is purely with the engineering principles being taught. Great care has been given to each item so as to provide wide experimental scope without unduly complicating or compromising the design. Each piece of apparatus is self-contained and compact.
Experimental Capabilities:
To determine the modulus of rigidity of the wire rod.
To verify the dependence of the periodic time of oscillation of a "shaft"mounted flywheel on the moment of inertia, length of shaft, and shaft diameter.
A central block is clamped to the test beam. Vibration Absorber carries two spring steel strips which are clamped in a cantilever arrangement transversely across the test beam. Experimental module, which fits into the Vibrations frame making up part of the Universal Vibration Apparatus. With the aid of the LVDT from the cantilevers and mass system can be tuned to the same natural frequency as the surround test beam and motor exciter. Attached onto each cantilever is a set of masses, which can have their magnitude and position adjusted. Once this is achieved the resonance frequency of the original system can be observed along with the resonance frequency of the Vibration Absorber itself.
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The Vibrations Frame offers the ideal working frame for all of the Universal Vibration apparatus experiment modules. The internal working dimension for mounting experiments is 1.22m x 0.76m. Manufactured from high quality, ergonomic aluminium profile, Vibrations Frame comprises solid side profiles for rigidly mounting experiment components and dual upper and lower members, which creates a mounting slot thus allowing the individual experiment components to be interchanged quickly and efficiently.
The Vibrations Frame comes fully assembled with no need for tooling or lengthy assembly.
Profile grooves create an accurate alignment of experiment components, and pre-assembled fasteners are integrated into the grooves for assembling of specific experiments within the range.
The Motor Exciter assembly houses two out of balance masses, which when rotated at speed, created a sinusoidal excitation. This excitation motion is transmitted to the test beam, which starts to vibrate. The frequency of vibration changes with the changing speed of the motor. The Motor Exciter is an essential part of the Universal Vibration Apparatus. Motor Exciter primary function is to transmit rotational motion into linear displacement of a beam, and hence force the beam to vibrate at varying amplitudes and frequencies. The Motor Exciter is controlled by the speed control unit. All the connection cables and sockets are factory fitted. A proximity sensor mounted to the rear of the motor gives the signal to the Tachometer. The Motor Exciter is clamped onto a rectangular beam, in the desired position, i.e. onto the beam within Free and Forced vibration module.
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