基于正交分析的复杂抗性消声器优化设计

发布时间：2018-03-15 19:37

本文选题：消声器　切入点：正交分析　出处：《山东大学》2014年硕士论文　论文类型：学位论文

【摘要】：随着工业的发展和人民生活水平的提高,环境噪声污染的防控要求日趋严格。工程机械作为我国装备工业的重要组成部分,在使用过程中伴随着环境噪声的产生,其最主要的噪声来源是内燃机的排气噪声。随着内燃机功率的不断提高,排气噪声也随之增大,排气消声器作为控制内燃机排气噪声最有效直接的手段,其优化设计具有重要的应用价值和实际意义。消声器的性能研究和结构的设计优化有多种手段,本文在正交分析理论的基础上,提出基于正交分析的复杂结构抗性消声器的优化设计方法。分析消声器建模仿真的正交试验结果,探讨消声器主要结构参数影响消声性能的显著程度,并分析其影响特点。本文讨论消声单元的种类及其特性,指出消声器的评价指标及设计要求,分析复杂结构消声器的构成和设计要素。阐述正交试验的设计步骤和结果分析方法。基于正交分析分别对典型结构和复杂结构的消声器结构参数进行设计研究,分析试验结果探讨穿孔管、插入管、各腔长度等结构参数对消声器空气动力学性能和声学性能的影响程度及原因,对比传递损失曲线讨论主要结构要素对消声器频率特性的影响。根据对复杂结构消声器的正交分析研究,提出正交设计流程,将其应用于正交设计实例中,根据正交分析结果提出优化消声器结构的改进方案,提高消声性能。本文研究设计用于工程机械动力柴油机的抗性消声器,通过台架试验和装机试验对设计产品空气动力学和声学方面的相关性能检测表明,基于正交分析的复杂结构消声器优化设计的改进方案在满足压力损失的条件下显著改善消声效果,实现降低挖掘机排气噪声的目的。成功设计作为工程机械动力柴油机排气消声装置的抗性消声器产品。
[Abstract]:With the development of industry and the improvement of people's living standard, environmental noise pollution prevention and control requirements are becoming more and more strict. As an important part of China's equipment industry, construction machinery is accompanied by the production of environmental noise in the process of use. The main source of noise is the exhaust noise of internal combustion engine. With the increasing of engine power, the exhaust noise also increases. The exhaust muffler is the most effective and direct means to control the exhaust noise of internal combustion engine. Its optimization design has important application value and practical significance. There are many ways to study the performance of muffler and optimize the structure. In this paper, based on the theory of orthogonal analysis, An optimal design method of resistant muffler for complex structure based on orthogonal analysis is proposed. The orthogonal test results of modeling and simulation of muffler are analyzed, and the significance of the main structural parameters of muffler affecting the performance of muffler is discussed, and the influence characteristics of muffler are analyzed. This paper discusses the types and characteristics of muffler units, points out the evaluation indexes and design requirements of mufflers, and analyzes the composition and design elements of mufflers with complex structures. The design procedure and result analysis method of orthogonal test are described. Based on orthogonal analysis, the structural parameters of muffler of typical structure and complex structure are studied, and the perforated tube and inserted tube are discussed by analyzing the test results. The influence of structural parameters such as cavity length on the aerodynamic performance and acoustic performance of muffler is discussed. The influence of main structural elements on the frequency characteristics of muffler is discussed by comparing the transfer loss curve. Based on the orthogonal analysis of the muffler of complex structure, the orthogonal design flow is put forward and applied to the example of orthogonal design. According to the results of orthogonal analysis, the improved scheme of optimizing the muffler structure is put forward to improve the performance of muffler. In this paper, the resistant muffler used in engineering machinery diesel engine is studied and designed. The test results of aerodynamics and acoustics of the designed product show that the performance of the designed product is tested by bench test and installation test. Based on orthogonal analysis, the improved scheme of optimal design of muffler with complex structure can significantly improve the noise suppression effect under the condition of satisfying the pressure loss. The purpose of reducing the exhaust noise of excavator is realized. The anti-noise muffler is successfully designed as the exhaust silencer of construction machinery power diesel engine.
【学位授予单位】：山东大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TB535.2

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