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柴油机辐射噪声预测及控制技术研究 87
文章编号: 1006 - 1355 (2008) 02 - 0087 - 05
柴油机辐射噪声预测及控制技术研究
王鑫,季振林
(哈尔滨工程大学动力与能源工程学院,哈尔滨 150001)
摘要:利用有限元法和边界元法预测 CY4102BG型柴油机在高负荷工况下的振动及辐射噪声特性,确定出
柴油机的高噪声区域,并针对噪声预测结果提出改进设计方案。分析了采用阻尼技术对噪声较高的油底壳部件辐
射噪声的影响以及在机体和油底壳之间安装加强板结构对柴油机结构噪声的影响。研究表明,采用这两种措施对
于降低柴油机辐射噪声具有良好的效果。
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关键词:声学;柴油机;辐射噪声;噪声预测;噪声控制;高负荷
中图分类号: TK42; O241. 82 文献标识码: A
Study of Pred iction and Con trol Techn iques for
D iesel Eng ine Rad ia ted No ise
WAN G X in, J I Zhen lin
(College of Power and Energy Engineering, Harbin Engineering University, Harbin 150001, China)
Abstract: The FEM and BEM are used to p redict the vibration and radiated noise characteristics of
the CY4012BG diesel engine under the condition of high load. The high noise area of the diesel engine is
determ ined, and then the imp roved designs are p roposed according to the p redicted noise results. The in
fluence of using the damp ing technique on the noise radiation from oil pan and the effects of installing the
reinforced p late structure between the engine block and oil pan on the structure radiated noise of the
diesel engine are analyzed. The study demonstrated that the above two methods are effective for reducing
the diesel engine radiated noise.
Key words: acoustics; diesel engine; radiated noise; noise p rediction; noise control; high load
柴油机噪声控制技术的实践表明:由于受到制
1 柴油机组