Non-linear rigidity vibration isolator for natural frequency of floating floorboard in high-speed vehicle

Abstract

The invention relates to a nonlinear rigidity vibration isolator of natural frequency for high speed vehicle floating floor board. It is made from vibration reduction glue and frame board. It has the nonlinear hardening rigidity feature and low system natural frequency and low influence of load to natural frequency. It has good vibration reduction effect and keeps low noise in the vehicle.

Description

technical field [0001] The invention relates to a vibration isolator in the technical field of noise and vibration control, in particular to a non-linear stiffness vibration isolator with equal natural frequency of the floating floor of a high-speed vehicle. Background technique [0002] The control of vehicle interior noise has attracted more and more attention, especially the interior noise of high-speed wheel-rail vehicles and high-speed maglev vehicles is an important indicator of passenger comfort, and even relates to the normal operation of high-speed vehicles. For high-speed wheel-rail vehicles, the wheel-rail vibration and noise are transmitted to the car floor through the suspension, which excites the car floor vibration, thereby radiating noise into the car. The noise transmitted into the car through the floor is the most important part of the car interior noise. For high-speed maglev vehicles, although there is no vibration excitation of the wheel rails, the vehic...

AI Technical Summary

Problems solved by technology

Therefore, the natural frequency of this type of vibration-isolated floating floor will be much higher than the design value of 20Hz under the condition of no load or fewer passengers, and the vibration isolation effect will not be as good as the design condition with full occupants, and the floor vibration will increase. The vibration radiates into the car and the noise will be relatively large

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