发动机机体辐射噪声优化方法研究  

Study on the Optimization Method for Radiation Noise Reduction of Engine Blocks

作　　者：杨靖 王营超 任翠翠 唐坚 冯仁华[2] YANG Jing;WANG Yingchao;REN Cuicui;TANG Jian;FENG Renhua(College of Mechanical andVehicle Engineering,Research Center forAdvanced PowertrainTechnology,HunanUniversity,Changsha 410082,China;Key Laboratory of Advanced Manufacturing Technology for Automobile Parts,Ministry of Education,Chongqing University of Technology,Chongqing 400054,China)

机构地区：[1]湖南大学机械与运载工程学院先进动力总成技术研究中心,长沙410082 [2]重庆理工大学汽车零部件先进制造技术教育部重点实验室,重庆400054

出　　处：《噪声与振动控制》2018年第6期91-95,共5页Noise and Vibration Control

摘　　要：针对某发动机机体辐射噪声突出的问题,在采用多体动力学、有限元法和边界元法的基础上,提出利用Minitab软件中的DOE多目标分析手段对发动机辐射噪声进行优化的方法,以该发动机机体为研究对象,对影响机体辐射噪声的7个因素进行研究,使用较少的组合次数得到机体中辐射噪声声功率、质量等参数的主要影响因素及各因素之间的交互关系,并根据相关影响情况,选取辐射噪声声功率和质量两个主要参数,重新调整各因素的参数值对机体进行优化。结果表明:经Minitab软件优化后该机体的辐射噪声声功率减小1.54 dB(A),和计算模拟值较吻合,提高了优化效率,且达到目标值要求。该方法为发动机机体辐射噪声的优化提供了崭新的思路。In view of the prominent problems existing in engine radiation noise, a method to analyze the radiated noise of engines is proposed based on the multi-body dynamics, finite element method and boundary element method, and the DOE multi-objective analysis in Minitab software. With the engine block as the research object, seven factors influencing the radiation noise of the block are studied. Using several combinations of the seven factors, the main influencing factors such as the sound power and the quality of the radiated noise, and the interaction among the factors are obtained. According to the interaction of the factors, the sound power and sound quality of the radiation noise are chosen to be the optimization targets. Optimization of the block is realized by readjust the parameters of the factors. The results show that the sound power of radiation noise of the block after the optimization by Minitab is reduced by 1.54 dB（A）, which is consistent with the value from the numerical simulation. This method improves the optimization efficiency and satisfies the target requirement. The method provides a new approach in the optimization of radiation noise of engine blocks.

关 键 词：声学 发动机机体 辐射噪声 DOE 优化方法 

分 类 号：U464[机械工程—车辆工程]