基于有限元法–正交球面波源边界点法的振动体声学灵敏度分析  

Acoustic sensitivity analysis based on finite element method–orthogonal spherical wave source boundary point method

作　　者：王文璟 WANG Wenjing(Tongling Polytechnic,Tongling 244061,China)

机构地区：[1]铜陵职业技术学院

出　　处：《广西科技大学学报》2019年第3期55-59,89,共6页Journal of Guangxi University of Science and Technology

基　　金：安徽省重点教学研究项目(2017jyxm0666)资助

摘　　要：建筑噪声是环境噪声污染的一个主要来源,解决建筑噪声辐射问题的根本途径是从噪声源入手控制噪声的产生,也就是对建筑设备进行低噪声设计.因此,必须对噪声源进行量化的声学灵敏度分析,以便为设计提供优化方向.本文提出基于有限元法-正交球面波源边界点法的声学灵敏度计算方法,用于振动体的辐射声场对振动体的材料和结构几何参数等设计变量的灵敏度计算.该方法避免了有限元-边界元法存在的系数矩阵奇异积分、数值求积和非唯一性问题,从而降低了设计计算的难度.数值计算结果表明了所提分析方法的正确性与可行性.The construction noise is a main source of environmental noise.The effective way to control the construction noise is to make the noise sources generate less noise,i.e.controlling noise in the design stage.However,implementing low noise design of construction equipments requires more information that cannot be obtained empirically.Instead,the quantitative value of acoustic sensitivity is necessary for low noise design since it can provide the optimized orientation for low noise design of radiating structures.In the paper,the finite element method and orthogonal spherical wave source boundary point method is combined for acoustic sensitivity analysis,by which sensitivity of acoustic quantities with respect to the design variables such as structural parameters and physical properties can be achieved precisely.Compared with the conventional method that combines the finite element method and boundary element method,the proposed method has no inherent problem of singular integration and non-uniqueness which will make numerical processing more complicated.The validity and feasibility of the proposed method is verified by numerical results.

关 键 词：建筑噪声 灵敏度分析 正交球面波源边界点法 有限元法 

分 类 号：TU112[建筑科学—建筑理论]