摘要
提出并推导了一种基于声能密度分布方程的声场预报方法。在能量和功率流的本构关系基础上建立声能密度平衡方程。应用直达声场和反射混响声场的叠加原理和边界面散射模型,建立了面向中高频复杂声场细节预报的数值计算方法。通过有限元计算结果在一个简单声场模型上对此方法做了验证,对比结果显示了声能密度法预报有可靠的精度和准确度。
An acoustic energy density model is proposed to predict acoustic fields at mid-high frequency. The derived equation comprises descriptions of direct field and reverberant field, taking account of diffusive reflection model. It allows the derivation of the sound field analysis in small scales. A simple acoustic enclosure as an example is investigated by FEM and the acoustic energy density method respectively. The comparative results show that the prediction of acoustic energy density method is accurate and reliable.
出处
《声学学报》
EI
CSCD
北大核心
2010年第2期134-139,共6页
Acta Acustica
基金
国家自然科学基金(10974217)资助项目
