| 耿宁烨,黎胜,孟春霞.改进的非负声强和有用声强识别表面声辐射*[J].,2018,37(3):438-444 |
| 改进的非负声强和有用声强识别表面声辐射* |
| Improved non-negative intensity and useful intensity for identification of radiating regions on surfaces |
| 投稿时间：2017-06-11 修订日期：2018-04-19 |
| 中文摘要: |
| 识别结构表面对远场声辐射有实质贡献的区域，对控制远场声辐射有重要意义。本文以非负声强法为基础得到改进的声强计算方法，这种方法比非负声强法计算量小，能更好地识别出表面对远场有贡献的区域。本文对有用声强法从特征值和截断准则的角度进行了一些改进。最后，以四边简支薄板为例，分别采用这三种方法计算几种不同频率下的噪声辐射区域。数值计算结果表明，采用本文提出的方法可以较好地识别出结构表面对远场声辐射有实质贡献的区域，而且计算量相对较小。 |
| 英文摘要: |
| Identification of radiating regions on arbitrarily shaped surface is important to control the far-field acoustic radiation. In the paper, an improved method is obtained, which is based on the non-negative intensity. This method reduces the amount of computation compared to the non-negative intensity and it is better than the non-negative intensity for identification of radiating regions on arbitrarily shaped surface. And some improvements are made on the useful intensity from the two points of eigenvalue and truncation criterion. In the end, examples of the application of the three methods are presented and the numerical results are discussed. The numerical results show that the proposed methods are very effective, which has application value. |
| DOI：10.11684/j.issn.1000-310X.2018.03.019 |
| 中文关键词: 声辐射 表面贡献 有用声强 非负声强 超声声强 |
| 英文关键词: Acoustic radiation surface contribution useful intensity non-negative intensity supersonic intensity |
| 基金项目:水下测控技术重点实验室延伸性发展基金项目(YSOC261506) |
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