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首页> 外文会议>International Congress on Sound and Vibration >SID, A COMPUTER CODE FOR PREDICTION OF SOUND FROM COMPLEX DUCT SYSTEMS
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SID, A COMPUTER CODE FOR PREDICTION OF SOUND FROM COMPLEX DUCT SYSTEMS

机译：SID，一种用于预测来自复杂的管道系统的声音的计算机代码

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摘要

A computer code for low frequency sound transmission and sound generation in duct systems has been developed at MWL/KTH. Plane wave 2-port theory is used to describe the sound transmission. The code includes typical elements for many applications such as: Helmholtz resonators, quarter wave resonators, conical resonators, expansion chambers with extended inlets and outlets, dissipative silencers, and catalytic converters. Over the last couple of years the code has been extended to include arbitrarily coupled 2-ports and sources located anywhere in the system. In each connection point (node) between the 2-ports, it is possible to introduce active 1-ports. By introducing the 1-ports, the network can handle several inlets and outlets. The source models developed have been focused on flow induced noise, where the noise is generated by flow separation at bends and constrictions. The developed code can simulate passive results, such as transmission loss and transfer matrices between arbitrary nodes in the network. It can also simulate active results, such as pressure and sound power at each node in the network. Comparisons between measurements and independent theoretical models have been made to validate the code.
机译：MWL / KTH开发了一种用于管道系统中低频声音传输和声音发电的计算机代码。平面波2端口理论用于描述声音传输。该代码包括许多应用的典型元素，例如：Helmholtz谐振器，四分之一波谐振器，锥形谐振器，具有延伸入口和出口的膨胀室，耗散沉默和催化转换器。在过去几年中，代码已扩展到包括位于系统任何地方的任意耦合的2端口和源。在2端口之间的每个连接点（节点）中，可以引入活动的1端口。通过引入1端口，网络可以处理多个入口和插座。开发的源模型一直专注于流动诱导噪声，其中噪声通过弯曲和收缩处的流动分离产生。开发的代码可以模拟被动结果，例如网络中任意节点之间的传输丢失和传输矩阵。它还可以模拟网络中每个节点的压力和声功率的活动结果。已经进行了测量和独立理论模型之间的比较来验证代码。

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