Abstract
This paper presents a theoretical study of the parameters that influence sandwich-type constrained layer damper design. Although there are different ways to reduce the noise generated by a railway wheel, most devices are based on the mechanism of increasing wheel damping. Sandwich-type constrained layer dampers can be designed so their resonance frequencies coincide with the wheel’s resonant vibration frequencies, and thus the damping effect can be concentrated within the frequency ranges of interest. However, the influence of design parameters has not yet been studied. Based on a number of numerical simulations, this paper provides recommendations for the design stages of sandwich-type constrained layer dampers.
Highlights
The environmental requirements for railway operation are becoming more and more demanding
Among the different ways of increasing wheel damping, this paper focused on sandwich-type constrained layer dampers (CLD)
For structural or acoustic simulations of damped railway wheels, the damping added by a given sandwich-type CLD solution has to be known
Summary
The environmental requirements for railway operation are becoming more and more demanding. Merideno et al [30, 31] highlighted the need to develop a specific model that calculates the damping added by sandwich-type CLD to the railway wheel, in order to avoid experimental measurements. They presented a procedure that could be employed in design stages where the damping device is not available. This paper makes use of the damping prediction model developed by Merideno et al [30] to analyse several design parameters of the sandwich-type CLD solution and study their influence on the resulting total damping of the wheeldamper system. The objective is that the results presented in this paper will be able to serve as a guideline for sandwich-type CLD designs, even for structures other than the railway wheel
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