梯度孔隙率材料数字化成型技术的研究

发布时间：2018-11-11 00:35

【摘要】：随着时代的发展，环境保护问题引起了人们越来越多的关注。噪声污染已被列为环境污染的四大公害之一。如何降低噪声污染已成为世界目前迫切要解决的问题之一，近些年来对于吸声材料及结构的研究也成为了当今社会的关注的焦点。本文针对当前吸声结构普遍存在的加工困难，成本高，有效吸声范围小的缺点，，提出了有效吸声范围大，吸声效果好，抵抗弯曲变形能力高而且经济性好的梯度孔隙率吸声结构。本文研究重点内容是梯度孔隙率结构的数字化成型技术。通过对当前数控技术现状和发展趋势的研究，设计开发了一套高效准确的数控系统，解决了普通的数控系统无法精确加工梯度孔隙率结构的难题。首先介绍了研究课题的背景及意义，并对吸声结构和数控技术的发展现状进行了简要的概括。提出了梯度孔隙率吸声结构，对其数字化成型系统进行了结构的设计，简要概括了整个系统的组成部分。其次针对所设计的数字化成型系统的特点，完成了整个系统的硬件部分和软件部分的设计。实验平台的硬件设计包括机械和控制部分。软件部分采用模块化设计，将整个系统的功能细分成不同的子程序，使用VC++语言进行程序编写，调试。最后使用设计完成的数控系统对梯度孔隙率材料自动成型。对孔隙率不同的模型进行了吸声实验和抗弯性能测试实验。收集实验数据进行分析计算，结果证明了梯度孔隙率材料吸声效果好，抵抗弯曲变形能力强，经济性好，有一定的发展前景。
[Abstract]:With the development of the times, people pay more and more attention to environmental protection. Noise pollution has been listed as one of the four public hazards of environmental pollution. How to reduce noise pollution has become one of the most urgent problems in the world. In recent years, the research on sound absorption materials and structures has become the focus of attention. In view of the disadvantages of high cost and small effective sound absorption range, it is pointed out that the effective sound absorption range is large and the sound absorption effect is good, aiming at the disadvantages of the current sound absorption structure which is generally difficult to process, high in cost and small in effective sound absorption range. Gradient porosity sound absorption structure with high resistance to bending deformation and good economy. This paper focuses on the digital molding technology of gradient porosity structure. Through the research on the present situation and development trend of NC technology, a set of high efficient and accurate numerical control system is designed and developed, which solves the problem that ordinary NC system can not accurately process gradient porosity structure. Firstly, the background and significance of the research are introduced, and the development of sound absorption structure and numerical control technology are briefly summarized. In this paper, the sound absorption structure of gradient porosity is put forward, the structure of the digital molding system is designed, and the component of the whole system is briefly summarized. Secondly, the hardware and software of the whole system are designed according to the characteristics of the digital molding system. The hardware design of the experimental platform includes mechanical and control parts. In the software part, the function of the whole system is subdivided into different subprograms, and the program is written and debugged by VC language. Finally, the gradient porosity material is automatically formed by using the designed numerical control system. The sound absorption test and bending performance test were carried out for the models with different porosity. The experimental data are collected for analysis and calculation. The results show that the gradient porosity material has good sound absorption effect, strong resistance to bending deformation, good economy, and has a certain development prospect.
【学位授予单位】：烟台大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TB535;TB34

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