轮式装载机驾驶室造型设计与舒适性研究

发布时间：2018-05-30 12:20

本文选题：轮式装载机 + 减振降噪优化　；参考：《东南大学》2017年硕士论文

【摘要】：本文以轮式装载机驾驶室为研究对象,针对驾驶室存在的振动噪声过大、座椅舒适性差以及视野安全隐患等问题,通过噪声源识别实验、有限元仿真分析、坐姿人机工程舒适性分析、视野开阔性分析等,研究影响驾驶室舒适性的因素,并以此为基础进行轮式装载机驾驶室的造型设计。(1)设计驾驶室噪声源识别实验方案,获取驾驶室重要位置的声压级数据和振动信号,分析该型号驾驶室振动噪声的来源。(2)依据有限元仿真理论和模态分析理论,建立驾驶室有限元模型,进行结构模态分析,获取结构固有频率及对应频率的振型;根据模态分析及实验测试结果,对产生低频振动噪声的大面积钢板和横梁进行改进设计。应用声学仿真软件LMS,对驾驶室进行声模态分析和耦合模态分析,获得车内空腔的声学共鸣频率和耦合频率,为驾驶室降噪提供参考。(3)根据人体坐姿理论和座椅设计原则,分析装载机座椅设计参数与人体尺寸之间的关联,利用人机工程学所建立的标准化人体尺寸数据库,实现以人体模型来驱动装载机座椅的设计,保证座椅的舒适性。(4)将眼椭圆理论应用到装载机驾驶室的视野设计中,分析驾驶员的眼椭圆参数尺寸及在驾驶室内的定位尺寸,根据人的视野特点对装载机前方垂直视野、前方水平视野进行开阔性校核。(5)从分析驾驶室的功能出发,应用人机工程学设计准则,进行人性化的造型设计。设计结果不仅满足功能的需要,同时确保驾驶室具有适宜的噪声环境、良好的座椅舒适性、开阔的工作视野。
[Abstract]:In this paper, the cab of wheel loader is taken as the research object. Aiming at the problems such as excessive vibration noise, poor seat comfort and hidden danger of visual field safety, the finite element simulation analysis is carried out through the noise source identification experiment. On the basis of the analysis of ergonomic comfort of sitting posture and the analysis of wide field of vision, the factors affecting the comfort of cab are studied, and based on this, the design of cab noise source identification experiment scheme of wheel loader cab is carried out, which is based on the modeling design of wheel loader cab. According to the finite element simulation theory and modal analysis theory, the finite element model of the cab is established, and the structural modal analysis is carried out, and the sound pressure level data and vibration signal of the cab are obtained, and the source of vibration and noise of the cab is analyzed. According to the modal analysis and experimental results, the large area steel plate and beam with low frequency vibration noise are improved. The acoustic modal analysis and coupling modal analysis of the cab are carried out by using the acoustic simulation software LMS. the acoustic resonance frequency and coupling frequency of the inner cavity of the vehicle are obtained, which provides a reference for reducing noise in the cab.) according to the theory of human sitting position and the principle of seat design, This paper analyzes the relationship between the design parameters of the loader seat and the human body size, and realizes the design of the loader seat driven by the human body model by using the standardized human dimension database established by ergonomics. To ensure the comfort of the seat, the eye ellipse theory is applied to the visual field design of the cab of the loader. The dimensions of the eye ellipse parameters of the driver and the positioning dimension in the cab are analyzed, and the vertical visual field in front of the loader is analyzed according to the characteristics of the human visual field. Based on the analysis of cab function, the humanized modeling design is carried out by applying ergonomics design criterion. The design results not only meet the needs of function, but also ensure that the cab has suitable noise environment, good seat comfort and wide working field.
【学位授予单位】：东南大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TH243

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