Abstract
Wire rope isolator is one of the most effective isolation system that can be used to attenuate the vibration disturbances and shocks during the operation of machineries. This paper presents the results of investigation on static elastic stiffnesses (both in tension and in compression) of Polycal Wire Rope Isolator (PWRI) under quasi-static monotonic loading conditions. It also studied effect of variations in height and width of PWRI on its static stiffnesses. Suitable experimental setup was designed and manufactured to meet the test conditions. The results show that their elastic stiffnesses for both tension and compression loading conditions are highly influenced by their geometric dimensions. It is found that their compressive stiffness reduced by 55% for an increment of 20% in their height to width ratio. Therefore, the stiffness of PWRI can be fine-tuned by controlling their dimensions according to the requirements of the application.
Highlights
Vibration is one of the most destructive means for industrial equipment or structures
The static elastic stiffness of Wire Rope Isolators (WRI) was determined from the behaviour in monotonic loading condition
The slope of the load-displacement graph represents the static stiffness of WRI and it is obtained by best-fitted linear curve from the experimental data points
Summary
Vibration is one of the most destructive means for industrial equipment or structures. The sources of vibration are either by nature such as an earthquake, wind and ocean waves or man-made such as the operation of heavy machineries and piling constructions[1, 2] These vibrational disturbances can gradually reduce the life of machines or structural elements in the industry [3]. Wire Rope Isolators (WRI) possess high damping capabilities which can help in vibrational energy dissipation [4]. It can provide protection by limiting the amount of displacements occurred. This design provides flexibility and energy absorption characteristics together with large displacement capacity to obtain its damping effect from the sliding friction between the twisted wire ropes [5]. It is practically essential to gain better understanding of the behaviour of the WRI
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