A wheel noise reduction method and composite damping noise reduction device

Abstract

The invention relates to a wheel noise reduction method. According to the vibration mode of the wheel, a noise reduction plate is arranged on the wheel spoke and a damper is arranged between the wheel rim and the wheel core to absorb and reduce the vibration mode of the wheel spoke and the wheel rim , to achieve a full range of wheel vibration and noise reduction effects. The present invention also provides a composite damping and noise reduction device, which includes a magnetic composite noise reduction plate arranged on the spoke and a diaphragm damper arranged between the rim and the wheel core, and uses the magnetic composite noise reduction plate to absorb and reduce the spoke The noise generated by the diaphragm damper is used to absorb and reduce the noise generated by the rim. This composite damping and noise reduction device not only greatly reduces the noise of the wheel, but also improves the radial and axial stiffness of the wheel and reduces the vibration of the wheel. The amount of deformation can effectively control the vibration and noise of the wheel from the source, and can increase the service life of the wheel.

Description

technical field [0001] The invention relates to a wheel noise reduction method, in particular to a wheel noise reduction method and a composite damping noise reduction device. Background technique [0002] With the continuous expansion of my country's railway network and the continuous improvement of passenger comfort requirements, the noise problem caused by train operation has become more and more prominent. When the train is running, the wheels roll on the track. Due to the unevenness of the wheel-rail tread, the modal vibration response of the wheel is excited, resulting in strong vibration and structural noise, which are radiated to the air through the wheel surface. At the same time, in the curved line section, due to the action of centrifugal force, the flange of the train wheel will rub against the side of the rail, causing the friction whistle of the wheel and rail. This rolling and friction scream has become the main noise of rail trains source. In order to impro...

AI Technical Summary

Problems solved by technology

[0017] 1) Regardless of whether it is an axially or radially installed damper, its design theory is mainly for rolling or friction noise, and it is impossible to design rolling and friction noise at the same time

If two kinds of dampers are installed at the same time, on the one hand, the strength of the rim is likely to cause problems, and on the other hand, too many connection designs are also likely to cause problems in connection reliability

[0018] 2) The dampers are all designed for the vibration of the rim, and the effect on the radiation noise of the spokes is limited

However, the existing noise reduction board is set in one piece, the boundary length of the constrained damping layer is small, and the noise reduction effect is not ideal

[0022] 3) The radiated noise of the wheel mainly comes from the vibration of the rim and the spokes. Simply using the noise reduction plate technology to control the vibration of the spokes, especially for the sound radiation caused by the radial mode of the wheel, the noise reduction effect still needs to be improved

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