AutoCAD在噪声环境影响预测评价中的应用

研究声强等值线的分布情况,是声环境预测工作中的一个关键环节。应用AutoCAD开发技术,开发了一套适用于线屏障和封闭屏障影响条件下的一般系统进行模拟的绘图程序,实现了声强分布的图形表达过程。在计算多线屏障影响的过程中,采用了对数加权的近似处理,避免了复杂的求解过程;在等值线的绘制过程中,采用了"线段首尾连接"的方法来追踪等值点,简化了追踪过程。

It is a key step in the sound environment forecasting work to study the status of sound isoline distribution. AutoCAD development technology is used to develop a set of simulating graphic program fitting for a common system with linear and closed barriers, and the plot express process of sound intensity distribution is completed. In the calculating for multilinear barriers＇ influence, a approximate treatment using logarithmic weighting is adopted, and a complicated solution procedure is avoided; in the plotting of sound isoline, the method of linesection connected from end-to-end（ LCEE ） is used to track isoline-point, and the tracking course is simplified.