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.

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.

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.

HAC120 Motor Exciter

The HAC120 exciter motor is an essential part of the HVT12 Universal Vibration Apparatus (sold separately).

Its 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.

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


HAC90 Tachometer

A bench top unit that operates in conjunction with the HVT12 Universal Vibration System. This unit display the excitation frequency (in Hz) of the motor exciter being used to excite the beam. This module will operate with both the HAC120 (sold separately) and motor exciter from the HVT12c (supplied with HVT12c). The digital display shows the excitation frequency in units of Hz and to a resolution of 1 decimal place.

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