摘要
列车在钢桥上运行时,钢桥构件振动所辐射的噪声具有频谱宽、幅值大和难控制的特点。从钢桥结构噪声的基本特性、预测方法和控制措施等层面进行分析总结,探讨了钢桥结构噪声研究的现状和发展趋势。结果表明:应进一步深化对钢桥结构噪声的频谱特征、传播规律和贡献量等基本特性的研究;"两步走"混合预测方法需兼顾精度和效率,而分频预测是钢桥结构噪声预测的重要手段;提出的降能、抑振、阻噪"三位一体"综合减振降噪策略是系统解决铁路钢桥噪声的必经途径。
When a train passes over a steel bridge,the noise radiated by vibrating steel bridge components has the characteristics of wide-spectrum,high-magnitude and control difficulty.In this paper,the basic characteristics,prediction methods and mitigation measures of the steel bridge-borne noise were analyzed and summarized.The current status and development trend of the research of steel bridge-borne noise were discussed.The results show that the spectral-characteristic,propagation law and contribution of steel bridge-borne noise should be studied further.The two-step hybrid prediction method should give consideration to both precision and efficiency,while the frequency division prediction is an important mean to predict steel bridge-borne noise.The"three-in-one"synthesis strategy for railway steel bridge noise control was presented,which involves reducing input energy,eliminating structural vibration and obstructing noise propagation.
引文
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