Interior noise analysis and prediction method of high speed train

Abstract

The invention discloses an interior noise analysis and prediction method of a high speed train. The method comprises the following steps: establishing a train reconditioning train body model, a statistical energy analysis model of a body in white structure and an interior and exterior vocal cavity statistical energy analysis model, and carrying out simplification and subsystem division; obtaining the statistical energy analysis parameters of the train body structure and an interior vocal cavity model, and loading the statistical energy analysis parameters onto a train body structure model plate subsystem and a vocal cavity model subsystem; and obtaining exterior vocal excitation source energy borne on the train body, applying the exterior vocal excitation source energy onto the exterior vocal cavity statistical energy analysis model, causing the exterior vocal excitation source energy to reach an interior vocal cavity after the exterior vocal excitation source energy is attenuated by the sound insulation property of a structural plate in a body in white structure model so as to obtain structural noise energy radiated into the train by the reconditioning train body under the function of the two-line suspension force of a compartment, and then, carrying out interior noise analysis and prediction. The problem that the interior noise of the train is difficult in prediction and the problems of the upper limit boundedness of a frequency domain, complex calculation flow, incomplete motivation consideration in the traditional method are overcome, calculation efficiency and prediction accuracy are improved, and development and test cost is lowered.

Description

technical field [0001] The present invention relates to a noise prediction method, in particular to a high-speed train interior noise analysis and prediction method in the field of rail transit vibration and noise. The energy analysis technology proposes to analyze and predict the noise inside the train during the development and design stage of high-speed trains. Background technique [0002] At present, the coverage area of ​​high-speed train lines in my country is gradually expanding, which brings convenience to people's travel and also brings noise problems. The essential difference between high-speed trains and ordinary trains lies in the qualitative change of the dynamic environment during train operation, that is, the dominant mechanical characteristics are changed to aerodynamic characteristics. Acoustic design has become an essential element in the design stage of high-speed trains with the increase of vehicle speed and the improvement of ride comfort requirements....

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to overcome the limitations of the upper limit of the analysis frequency domain, long calculation period, large calculation amount, complicated calculation process and low calculation accuracy in the existing three high-speed train interior noise prediction methods, and provide a A high-speed train interior noise analysis and prediction method, in order to broaden the interior noise analysis frequency band, improve calculation efficiency and prediction accuracy, provide a basis for train interior noise control, shorten the acoustic design cycle of high-speed trains, reduce development and test costs, and make trains The internal noise meets the design and standard requirements

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