传统的暖通空调(heating,ventilation and air conditioning,HVAC)系统声学设计多依赖于设计人员的经验,重复性工作多,自动化水平低.为实现智能化设计,应用有向无环图、带权有向邻接矩阵、科学计算可视化等方法将通风管道消声系统的声学设计过程系统化.提出一种能够自动计算管道内任意处噪音及特定的房间内噪声值的算法,包括三维模型构建,噪声衰减图生成,声学路径确定,声学单元解算,声学结果可视化等关键环节.实验结果表明:该系统鲁棒性强,计算结果准确,响应快速.所提算法结果与设计人员利用传统方法计算出的结果误差不超过±2％,计算时长均小于0.2 s,常见的中小规模的通风系统计算时间则在0.1 s以内.基于此算法计算得出的噪声值结果能够与三维模型结合,直观展示噪声分布情况,在通风空调系统设计过程中提供参考依据.
Noise Elimination Design of Ventilation Duct System Based on DAG
Traditional acoustic design of heating,ventilation and air conditioning(HVAC)system mostly relies on the experience of designers,with significant repetition and minimal automation.To achieve the goal of intelligent design,methods such as directed acyclic graph,weighted directed adjacency matrix,and visualization were applied in the acoustic design of ventilation duct system.An algorithm was proposed to automatically calculate the noise levels at any place,whether in the duct or a specific room.The key components such as building 3D models,designing noise attenuation diagram,determining acoustic path,solving acoustic unit,and visualizing acoustic results were included in this system.The results show that this system is robust,accurate and quick to respond.The deviation between results from traditional methods and the proposed algorithm is no more than±2％,and the computation time is less than 0.2 s,whereas the running time for some small and medium ventilation systems is within 0.1 s.The results based on this algorithm can be combined with 3D models to visualize the change of noise values and provide a reference in the design process of HVAC systems.
万方数据
维普
