摘要
为解决多工况载荷下复杂结构的计算效率问题,采用基于边界元原理的声传递向量ATV方法进行声学数值预报,与FEM/BEM方法对比表明,两种方法在整个频段的计算结果基本一致;将该方法用于求解多工况下锥柱混合结构模型的远场声学响应,讨论模型锥度及肋骨因素对声场特性的影响,得到肋骨对声场的作用要远大于锥度的影响;利用对模型的声辐射贡献量的计算结果,对模型局部面板进行阻尼处理,降低了声场的噪声峰值和平均噪声声压级。
For solving calculation efficiency of multi-loading construction,the acoustic transfer vector（ ATV） method based on FEM is used for acoustic forecast. Comparing the results of ATV with those of FEM / BEM,showing that the calculation results in whole frequently between the two methods are in substantial agreement. This method is used for calculating far-field acoustic response of the cone-cylinder structure,to discuss about the effects of structural conical angle and stiffened ribs on acoustic response,finding that the ribs performs more important than the cone angle. The contribution value of sound radiation is used for model panel local damping disposal to decrease the noise peak value and average noise level in sound field.
出处
《船海工程》
北大核心
2015年第3期58-62,共5页
Ship & Ocean Engineering
基金
江苏省科技支撑计划(BE2013107)
关键词
声传递向量法
声学数值预报
锥柱混合结构
acoustic transfer vector method
acoustic forecast
cone-cylinder structure.
