摘要
针对柴油机插入管排气消声器宽频段(0~1300 Hz)和低频段(0~800 Hz)消声效果不佳的情况,本文提出一种基于多目标的消声器结构优化方法。首先,联合采用有限元法与多元统计方法,建立基于结构参数的插入管排气消声器压力损失函数。其次,基于一维平面波理论建立插入管排气消声器宽频传递损失函数和低频传递损失函数。最后,以压力损失、宽频传递损失和低频传递损失为优化目标,采用多目标优化遗传算法(NSGA-II)进行消声器结构优化,得到了最优结构参数组合。试验结果表明:优化后的消声器既提高了传递损失,又降低了压力损失。优化后消声器的低频传递损失和宽频传递损失比优化前分别提高了4.44 dB和8.10 dB,提高率分别为42.05%和80.52%;压力损失比优化前降低了181.9 Pa,降低率为5.49%。本文建立的基于多目标遗传算法的消声器结构优化方法可为插入管排气消声器的优化设计提供理论依据。
In order to address the issue of suboptimal acoustic performance of inserted pipe exhaust mufflers within the broadband frequency range(0~1300 Hz)and low frequency range(0~800 Hz),a novel structural optimization method based on the multiobjective optimization for the exhaust muffler was introduced.Firstly,the finite element method and multivariate statistical method were used to formulate a pressure loss function for the inserted pipe exhaust mufflers based on structural parameters.Subsequently,on one-dimensional plane wave theory was used to establish the broadband frequency transmission loss function and low frequency transmission loss function of the inserted pipe exhaust mufflers.Finally,the pressure loss,broadband transmission loss,and lowfrequency transmission loss were used as the optimization objectives,and the multi-objective genetic algorithm(NSGA-II)was used to optimize the muffler structure.Then the optimal combination of structural parameters was obtained.The experimental results showed that the optimized muffler not only increased the transmission loss but also reduced the pressure loss.The low-frequency transmission loss and broadband transmission loss of the optimized muffler increased by 4.44 dB and 8.10 dB,respectively,with improvement rates of 42.05%and 80.52%.The pressure loss decreased by 181.9 Pa,with a reduction rate of 5.49%.The structural optimization algorithm outlined in this article could provide a theoretical basis for the optimization design of inserted pipe exhaust mufflers.
作者
张海军
苏赫
武佩
ZHANG Haijun;SU He;WU Pei(Intelligent Manufacturing and Elevator College,Huzhou Vocational and Technical College,Huzhou 313099,China;College of Mechanical and Electrical Engineering,Inner Mongolia Agricultural University,Hohhot 010018,China;Key Laboratory of Huzhou New Energy Electric Drive Technology,Huzhou 313099,China)
出处
《内蒙古农业大学学报（自然科学版）》
CAS
北大核心
2024年第1期27-33,共7页
Journal of Inner Mongolia Agricultural University(Natural Science Edition)
基金
湖州市自然科学基金项目(2023YZ01)
湖州职业技术学院高层次人才专项课题项目(2022GY14)
内蒙古自治区自然科学基金项目(2023MS05022)
内蒙古自治区直属高校基本科研项目(BR230155)
湖州市新能源电驱动技术重点实验室资助项目
关键词
内燃机
消声器
压力损失
多目标优化
Internal combustion engine
Muffler
Pressure loss
Multi-objective optimization
