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基于界面扩散反射的声辐射度模拟方法在单一空间中已得到有效的应用.文中针对耦合空间中的声能衰变,提出一种改进的声辐射度模型.该模型将耦合开口设置为分属于两个子空间的虚拟界面,在每个计算时间步长内,对各子空间中声辐射度进行独立计算,并通过虚拟界面上声辐射度的接收和传播实现子空间声能的交换.改进模型可有效降低计算量,提高计算效率,同时克服了不同子空间中面元的可见性判断所产生的误差,提高了模拟的收敛速度.与实测结果的对比表明,改进模型对耦合空间中的声能衰变具有较好的预测精度.
The acoustic radiance simulation method based on interface diffusion reflection has been effectively applied in a single space.In this paper, an improved model of acoustic radiance is proposed for the acoustic energy decay in coupling space. The model sets the coupling opening to belong to two And the sub-space virtual interface calculates the sound radiance in each subspace independently in each calculation time step, and exchanges the subsonic sound energy through the reception and propagation of sound radiance on the virtual interface. The improved model Which can effectively reduce the computational load and improve the computational efficiency and meanwhile overcome the errors caused by the visibility of the bin in different subspaces and improve the convergence speed of the simulation.Compared with the measured results, Decay has good prediction accuracy.