The VIBRATIONS range enables clear and comprehensive learning of VIBRATIONS covering a variety of theories and topics. An understanding of the way in which materials and components react to excitation, is fundamental when studying the application of loads on a variety of fixed structures and rotating machinery. The VIBRATIONS range forms a comprehensive range of equipment, from simple pendulums, beam vibrations to complex structural vibrations. All are suitable for demonstration and experimental work.

All the VIBRATIONS hardware operates in a standalone mode, with some being supplied with Data Acquisition Interfaces and Software.



HVT3 Compound Pendulum

A wall mounted bracket has a metre long bar suspended from its knife-edge pivot point. Attached to the pendulum bar is a movable mass. The mass can be fixed along the pendulum bar in seven positions.

HVT12 Universal Vibration Apparatus

A rectangular steel beam pivots at one end from a bracket and bearing attached to the HVT12f Vibration Frame. A spring is attached to the free end of the beam to enable the beam to vibrate. The horizontal position of the spring can be adjusted using the integral adjustment system

Beam displacement is measured using an LVDT displacement transducer from the HAC90 Tachometer. The output signal from the LVDT can be displayed using the HVT12k data Acquisition system.

HVT13 Torsional Vibration Apparatus

This bench top mounted unit is used to study torsion and torsional vibration. The apparatus is constructed around a profiled aluminium base onto which are mounted 4 vertical chuck pillars. Each pillar contains a central shaft running in precision bearings with a chuck at one end which grips a torsion specimen. Each chuck also contains a large disc of varying mass and inertia. With these chucks it is possible to assemble a torsion specimen with up to 3 masses. Vibrations are transmitted into the torsion specimen by means of an exciter, which is electronically speed controlled from the main control unit. Angular movement sensors on the chuck pillars provide the amplitude of vibration as an electrical signal. The control unit conditions these signals and makes them available to view on the HVT13k Data Acquisition System. Static twist of the specimen is achievable using the attachable protractor, pointer, hanger and calibrated weights supplied.

Optional Accessories: HVT13k

 

HVT14d Digital Spring Mass Vibration System

The HVT14 Spring Mass Vibrations Apparatus is a bench top or floor mounted unit to analyse the oscillations of a helical spring mass system. 

The spring can then be loaded with a number of set masses as well as having the option of testing the spring oscillations in free or damped conditions. The damped option requires the damper to be attached to the bottom of the spring, this too can be varied with different media to dampen the movement or by changing the dampening discs. The spring is then extended into a static loaded position and held in place via a locking mechanism.

The HVT14d is supplied with a sensor box and accelerometer sensor to trace the vertical movements of a freely vibrating spring. The spring is manually loaded into position, variable for standard experimentation include spring length (number of active coils), initial loading position, mass added to spring, damping pot and dampening discs.is set up with an accelerometer sensor which is used with the HVT14d sensor box that incorporates a digital oscilloscope.

HVT12c Beam Bending (Transverse) Vibration Module

Experimental module for the vibration analysis of transverse beam bending. The apparatus consists of two end fixings that support a beam. One end allows beam rotation only, whilst the other end allows rotation and horizontal movement only. The beam is forced to vibrate using a clamp on motor exciter supplied. This exciter operates from a high speed motor and has two eccentric masses attached at either end of the motor shaft. The rotation of the masses induces the excitation frequency of the beam. Additional masses can be added to the motor exciter to change the experimental parameters. The vibration of the beam is monitored using the sensor of the HAC190.

The HAC190 optional accessory is required to control the speed of the motor exciter and the HVT12k optional accessory to display the excitation frequency and output frequency.

 

Optional Accessories: HAC190, HVT12k, HVT12f

 

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