Structure-borne vibration is becoming a serious concern as structures become lighter in weight and built closer to major sources of vibration such as railway lines and industrial plant etc.
Vibrational energy will take the path of least resistance and a stiff lightweight structure offers an excellent path to transmit the vibration from the transmitter to the receiver. The first measure of vibration control should be to isolate the source but if this is not sufficient or possible then measures can be taken to isolate or dampen the intermediate structure.
Incorporating materials into a structure with a lower stiffness than adjacent materials (such as elastomeric isolators) will effectively reduce the transmission of vibration in either direction. They also provide a degree of structural damping which will reduce any vibration disturbance as well as being very important when a structure is as risk from the effects of resonance as it is the only way to control the amplitude of vibration.
Elastomeric isolators can also be used a resilient seatings since they possess the added advantages of being able to absorb bending, torsion and rotation modes and can eliminate the risk of local stress concentrations which may arise from thermal expansion / contraction or ground settlement. These features, combined with the intrinsic damping of elastomeric materials make them far superior to lighter weight, glass fibre equivalents.
Farrat offers a comprehensive range of multi use elastomeric isolation materials (seen below) which can be used in all areas of construction to reduce structure-borne vibration and acoustic transmission across a wide frequency range. Our complete confidence in the material properties and performance is based on thorough lab testing as well as extensive, long term experience of use in a variety of scenarios.
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