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论文编号 ZXX114 论文字数:13322,页数:26
摘要
随着我国航空事业的不断发展，机场噪声问题日益突出。因此，机场周围飞机噪声的测量方法的研究就显得尤为重要了。
本课题主要研究了机场周围飞机噪声的测量方法，即精密法和简易法。精密法测量的结果更精确，简易法采用A计权网络进行测量，采用A声级加13dB近似计算感觉噪声级时偏差较大；精密法有24个频率点的数据参与计算，而简易法只是简单的通过等效声级进行计算，计算比较简单。通过两种测量方法的测量结果的比较可知，简易法与精密法的测量结果存在差异，两者LWECPN的平均差值为-0.53dB，用-0.53dB来对简易法的测量结果进行修正。修正后的简易法测量结果与精密法的测量结果更为接近，其平均差值几乎为零。
关键词：飞机噪声，测量方法，研究
ABSTRACT
Along with our country aviation business of continuously development,airport noise problem increasingly salient. Therefore measurement of aircraft noise around airport becomes very important.
This thesis mainly study measurement of aircraft noise around airport, namely precise method and simple method. Precise method’measure outcome is more exactness, simple method use A-weight network to calculate, windage is rather big when use sound level plus 13dB close to calculate perceived noise level. Precise method have 24 frequency dot’ data participate in calculate, and that simple method is simple through equivalent sound level to calculate, calculate is simple. Compare this two measure method’s measure outcome can know that simple method and precise method’s measure outcome exist difference. This two LWECPN’ average difference is -0.53dB, then use -0.53dB to have a correct to simple method’ measure outcome. Corrected measure outcome of simple method is more close to precise method’ measure outcome , and their average difference is almost to be zero.
Keywords：airplane noise, measure method, study
目录
摘要 I
ABSTRACT II
第1章 引言 1
1.1 背景 1
1.2 研究意义 2
1.3 研究内容 4
第2章 飞机噪声研究现状 5
2.1机场噪声污染现状 5
2.2国内外研究现状 5
第3章 飞机噪声及其测量原理 8
3.1 飞机噪声 8
3.2 飞机噪声的评价量 8
3.3 飞机噪声测量原理 10
3.4 飞机噪声测量的主要仪器 12
第4章 测量结果比较分析 15
4.1 噪声测量安排 15
4.2 简易法测量 17
4.3 精密法测量 17
4.4 两种测量结果的比较 18
4.5 简易法测量公式的修正 18
4.6 结论 19
第5章 总结 21
致谢 22
参考文献 23 |
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发表于 20:51