摘要
基于齐次扩容精细积分法和复数矢径虚拟边界谱方法,通过Fourier积分变换和稳相法来研究箱形梁声辐射问题,提出了一种具有较高效率和精度的求解空气中无限长混凝土箱形梁声辐射问题的半解析方法,并得到了箱形梁声辐射问题的半解析解。为进一步了解城市高架轨道箱形梁的声辐射特性,对已建线路的噪声控制及待建线路噪声的前期预测和箱形梁截面的优化设计都具有十分重要的意义。
The research based on the extended homogeneous capacity high precision integration method and the spectrum method of virtual boundary with a complex radius vector and gains a semi-analytical solution for acoustic radiation from the box beam. A semi-analytical method, which has satisfactory computation effectiveness and precision, is presented for solving the acoustic radiation from an infinite concrete box beam in the air by means of the Fourier integral transformation and stationary phase method. It＇s very significant for further understanding the acoustic radiation characteristic of the urban elevated railroad box beam, controlling noise of the built railroad and prophase forecasting noise of the planning railroad, and doing the cross-section optimization design of the box beam.
出处
《武汉理工大学学报》
EI
CAS
CSCD
北大核心
2008年第12期165-169,共5页
Journal of Wuhan University of Technology
基金
国家自然科学基金(50678141)
关键词
箱形梁
声辐射
半解析方法
传递矩阵法
box beam
acoustic radiation
semi-analytical method
transfer matrix method
