消声器传递损失预测的边界元数值配点混合方法  

Transmission loss prediction for silencers by using the combination of boundary element method and numerical collocation approach

作　　者：杨亮[1] 季振林[1] Wu T W 

机构地区：[1]哈尔滨工程大学动力与能源工程学院,哈尔滨150001 [2]肯塔基大学机械工程学院,列克星敦40506

出　　处：《振动与冲击》2016年第2期153-157,206,共6页Journal of Vibration and Shock

基　　金：国家自然科学基金(11174065)

摘　　要：将边界元法与数值配点法结合形成混合方法用于计算任意截面形状消声器的传递损失。消声器划分为若干子结构,用边界元法计算具有非规则形状的子结构阻抗矩阵,用二维有限元法提取等截面子结构特征值及特征向量,用配点法获得阻抗矩阵;将每个子结构阻抗矩阵连接用于传递损失计算。为减少计算时间提出简化方法计算消声器传递损失。结果表明,混合法在保证计算精度前提下可节省计算时间。A technique combining the boundary element method （BEM） and numerical collocation approach was proposed to calculate the transmission loss of silencers with arbitrary cross-section. The silencer was divided into several substructures. The BEM and the numerical collocation approach were employed combinedly to evaluate the impedance matrices of substructures with non-regular cross-section and axially uniform cross-section respectively, and then the impedance matrices for all substructures were achieved. The transmission loss predictions of several silencers agree well with the results by BEM. The computational efficiency was analyzed and compared with that of the traditional substructure method, the combined technique may save computational time efficiently.

关 键 词：消声器 传递损失 边界元方法 数值配点方法 

分 类 号：TB535[理学—物理]