Method and device for reducing noise in railway vehicle

The embodiment of the invention provides an in-vehicle noise reduction method and device for a railway vehicle. The method comprises the steps that noise testing is carried out in the vehicle to obtain noise information; analyzing the contribution amount of the vehicle panel according to the noise information to obtain a weak combined part; testing the weak combined part to obtain the sound insulation index of the weak combined part; performing sound insulation weight analysis on the layered structure of the weak combined part according to the sound insulation index of the weak combined part to obtain a weight analysis result; and taking the weight analysis result and a preset index as boundary input to obtain a noise reduction optimization scheme. On the premise of taking the vehicle noise as a control target, the weak area of the component is identified, the sound insulation index layered decoupling is performed on the weak area structure, multiple targets are compatible, and one or more parameters of the v