摘要
通过声场的特性和规律分析可以识别和定位噪声源,对噪声控制以及声源的设计提供参考。数值方法是求解有源声场的重要工具,复杂的声辐射一般可分解为简单的声辐射叠加。研究了单极子、偶极子、活塞等几种理想声源辐射声场的解析解,并用有限元法计算数值解,得到相应的辐射声场,包括声压、速度、指向性等量,有限元法得到的数值结果与解析解吻合;利用有限元法计算了点声源的线性阵列与平面阵列等典型的叠加声场。对各种声源的特性和辐射声场的规律以及在工程领域中的应用进行了归纳。
Through the analysis of the characteristics and laws of acoustic field, the acoustic source can be identified and located, which can provide reference for noise control and acoustic source design. Numerical analysis is an important tool to solve active acoustic field. Complicated acoustic radiation can be disassembled to superposition of simple acoustic radiation. In this paper, analytic solution of monopole, dipole, piston and other radiation acoustic field of ideal acoustic source was studied, and numerical solution calculated by finite element method, corresponding radiation acoustic field including acoustic pressure, velocity, directivity and other items can be acquired, numerical solution from finite element method was consistent with analytic solution. A typical superimposed sound field such as linear and planar array of point acoustic source was calculated by using the finite element method. Applications of various acoustic source radiation field were concluded.
作者
李丽君
孙海信
刘怡然
孙丰山
LI Li-jun;SUN Hai-xin;LIU Yi-ran;SUN Feng-shan(Shandong University of Technology, School of Transportation and Vehicle Engineering, Shandong Zibo 255049, China;Key Laboratory of Underwater Acoustic Communication and Marine Information Technology, Fujian Xiamen 361005, China)
出处
《机械设计与制造》
北大核心
2019年第4期192-195,共4页
Machinery Design & Manufacture
基金
国家自然科学基金项目(51505261)
山东省自然科学基金项目(ZR2015AM013)
关键词
声源
声场
声压
速度
有限元法
Acoustic Source
Acoustic Field
Acoustic Pressure
Velocity
Finite Element Method
