CAJ | 학술논문

针对管道消声器的消声特性，采用边界元方法研究了变截面管道对消声器消声特性的影响。分析了不同形式的膨胀室和最大扩张截面位置对管道消声特性的影响规律。计算结果显示：直线和圆弧模型的膨胀室消声器在850～1000 Hz 范围内的消声特性优于矩形膨胀腔，而膨胀室截面最大扩张位置对传递损失的影响是关于扩张段中心相对称的；当最大扩张截面位于消声器两端时，传递损失在频率大于1100 Hz 时变化不大。研究可为消声器的设计提供一定的参考。
침대관도소성기적소성특성，채용변계원방법연구료변절면관도대소성기소성특성적영향。분석료불동형식적팽창실화최대확장절면위치대관도소성특성적영향규률。계산결과현시：직선화원호모형적팽창실소성기재850～1000 Hz 범위내적소성특성우우구형팽창강，이팽창실절면최대확장위치대전체손실적영향시관우확장단중심상대칭적；당최대확장절면위우소성기량단시，전체손실재빈솔대우1100 Hz 시변화불대。연구가위소성기적설계제공일정적삼고。
The acoustic attenuation performance of tubes with varying cross-section chambers are studied in this paper based on boundary element method.The effect of structure parameters upon acoustic attenuation performance is analyzed.According to the calculation results,in the range of 850~1 000 Hz,the acoustic attenuation performance of the linear and circular models is better than that of the rectangular model.The effect of the maximum expansion cross-section position on the transmission loss is symmetrical about the center of the expansion chamber.When the maximum expansion cross-section position is located at the end of the chamber,the value of transmission loss has little change in the frequency above 1 100 Hz.These results can provide a reference for the design of mufflers.