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Device and method for controlling aerodynamic noise at joints of train carriages and train

A technology of aerodynamic noise and control devices, which is applied to railway car bodies, transportation and packaging, railway car body parts, etc., can solve problems such as abnormal noise at the joints of carriages, achieve abnormal noise, avoid cavity resonance, and prolong service life Effect

Active Publication Date: 2022-02-01
CRRC TANGSHAN CO LTD
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  • Abstract
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Problems solved by technology

[0008] The purpose of the embodiments of the present invention is to provide a device, method and train for controlling aerodynamic noise at the junction of train carriages, aiming to solve the technical problem of abnormal noise at the junction of carriages while ensuring driving safety and facilitating train maintenance.

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  • Device and method for controlling aerodynamic noise at joints of train carriages and train
  • Device and method for controlling aerodynamic noise at joints of train carriages and train

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Embodiment Construction

[0039] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0040] The simulation analysis of the results of the existing outer windshield shows that the excitation frequency of the aerodynamic noise at the junction of the car is close to the second order of the acoustic mode frequency of the cavity and thus stimulates resonance, which leads to abnormal noise in the mechanic's room inside the car. Analysis of the cloud diagram of the total pulsating pressure level at the junction of the carriages shows that the total pulsation pressure level formed at the rear end of the upper and lower gaps of the windshield at the junction...

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Abstract

The invention provides an aerodynamic noise control device, method and train at the junction of train carriages, belonging to the technical field of trains. The aerodynamic noise control device at the joint of the train car is used to install to the gap at the joint of the car, including a fixed installation part and a spoiler part. The fixed installation part is used to be installed at the end of the gap close to the car and fixedly connected with the car; One end is rotatably connected to the fixed installation part, and the other end is provided with a spoiler structure, and the outer contour of the spoiler part matches the outer contour of the notch. The invention also provides a method for controlling the aerodynamic noise at the junction of train carriages and the train. The aerodynamic noise control device, method and train provided by the present invention fundamentally change the aerodynamic noise excitation source at the car joint, solve the problem of abnormal noise at the car joint, and avoid cavity resonance at the car joint , prolong the service life of the components at the connection of the carriage.

Description

technical field [0001] The invention belongs to the technical field of trains, and more specifically relates to a device and method for controlling aerodynamic noise at the connection of train carriages and a train. Background technique [0002] With the rapid development of the high-speed rail industry, the running speed of high-speed trains on most lines in my country has exceeded 300km / h, and some lines have reached 350km / h. While the operating speed is increased, it also causes a rapid increase in aerodynamic noise. The car joint itself is a weak link in the sound insulation of high-speed trains. Considering the service life of the outer windshield and the maintenance of equipment at the car joint, the outer windshield of high-speed trains is usually designed with upper and lower gaps. However, this design scheme will cause the aerodynamic noise excitation source generated under the high-speed operation of the train to enter the cavity surrounded by the end wall of the ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B61D17/00
CPCB61D17/00
Inventor 张文敏贾尚帅潘德阔韩铁礼赵新利
Owner CRRC TANGSHAN CO LTD
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