The invention discloses a noise reduction structure of a high-speed train cowcatcher. The noise reduction structure comprises the cowcatcher. The array structure consists of a plurality of fin structures and is distributed at the lower edge of the windward front end of the cowcatcher; a single fin structure is of an equal-thickness sheet structure and is provided with a straight rectangular bottom surface, the narrow side of the rectangular bottom surface is an arc surface starting end, the arc surface ending position is connected with the other narrow end line of the rectangular bottom surface to form a straight plane, and the plane and the arc surface are tangent at the arc surface ending position to form the fin-like structure. The invention belongs to the technical field of high-speed train cowcatcher, and particularly relates to a novel high-speed train dipole aerodynamic noise identification method, which identifies the main noise source position of a cowcatcher, studies the fluid noise reduction mechanism of fin structures, and invents a sheet array structure based on fin structures. The device is arranged at a serious noise source part of the cowcatcher, so that the noise source of the cowcatcher is effectively controlled.
本发明公开了一种高速列车排障器的降噪结构,包括排障器;阵列结构,由多个鱼鳍结构组成,分布于排障器迎风前端下缘;鱼鳍结构,仿鱼鳍的片状结构,单个鱼鳍结构为等厚度片状结构,有一个平直矩形底面,矩形底面窄的一边为一圆弧面起始端,圆弧面终止处与矩形底面另一窄端线连接成直平面,该面和圆弧面在圆弧面终止处向切,形成类鱼鳍结构。本发明属于高速列车排障器技术领域,具体是利用了一种高速列车偶极子气动噪声识别新方法,识别出了排障器主要噪声源位置,并研究鱼鳍结构降低流体噪声的机制,发明了基于鱼鳍结构组成的片状阵列结构,布置于排障器噪声源严重部位,有效实现了对排障器噪声源的控制。
Noise reduction structure of high-speed train cowcatcher
一种高速列车排障器的降噪结构
2025-01-03
Patent
Electronic Resource
Chinese
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