硕士学位毕业论文

硕士研究生：徐沛鑫

指导教师：沈斌 教授 

答辩时间：2013.06

摘要

液压支架是综合机械化采煤中的重要设备，在确保其安全性和功能的基础上，进行轻量化设计，减少重量，对于降低产品成本、提高经济效益，具有重要的意义。

本文首先对液压支架进行了参数化建模,利用Pro/E进行了二次开发，为后期的结构优化效率的提高了奠定了基础。然后以顶梁为例对轻量化的方法进行了研究，为该课题整架的优化研究提供了理论和方法，具体内容如下：

1.为了能够快速提供优化过程中所需要的模型，对液压支架采用了参数化的骨架建模，实现了模型的快速修改和重生。

2.利用Pro/E二次开发程序，开发了液压支架的参数化设计平台及尺寸驱动平台。该平台实现了液压支架的参数化受力分析，为液压支架的设计提供了力学依据。同时也可以通过对骨架参数刷新，实现液压支架模型的驱动再生。并且在该平台中添加了参数关联功能，实现了对模型中任意参数的尺寸驱动。

3.建立了液压支架顶梁的有限元模型，并进行了有限元计算，得到了不同工况下液压支架顶梁的应力和应变，为顶梁轻量化分析的奠定了基础。

4.为了对顶梁进行轻量化研究，选取了三个顶梁关键部件尺寸作为设计变量，以降低顶梁在不同工况下最大应力为研究目标，通过试验设计选取了试验样本点，并通过有限元计算得到了样本点的响应值。同时引入了牛顿插值法进行最大应力计算，为提高整架结构优化的效率进行了探索研究。

5.基于响应面法，建立了顶梁最大应力的近似模型，并对响应面模型进行了验证。响应面模型的建立解决了液压支架顶梁结构优化过程中高精度有限元计算费时费力且优化效率低的问题，使优化效率得到了提高。液压支架顶梁的优化研究为其他部件以及整架结构的优化提供了思路和方法。

关键词：液压支架，二次开发，顶梁，代理模型，结构优化 

ABSTRACT

Hydraulic support is an important mechanized coal mining equipment. Ensuring its security and functionality，to make lightweight design, reduce weight, is of great significance for reducing product costs and improve economic efficiency.

This article first made the parametric modeling of hydraulic support and secondary development by Pro/E, to base the foundation of efficiency improvement von structural optimization. Then made an example by roof beam to study methods of lightweight. Thus providing methods and theory for the entire shelf optimization, specific content is as follows:

1. To be able to provide the required model for optimization and to achieve the function of rapid changes and remodeling, the hydraulic support was made by parametric skeleton modeling.

2. Hydraulic support parametric design and dimension-driven platform was established by using Pro/E secondary development programme. The platform can provide parametric stress analysis for hydraulic support design. And it can achieve hydraulic support model driven generation by refreshing skeleton parameters. A parameter correlation function was added to the platform and realized dimension-driven of any parameter.

3. A hydraulic support roof beam finite element model was established and was made finite calculation. Then stress and strain of hydraulic support roof beam in different conditions was achieved. It is the foundation of roof beam lightweight analysis.

4. In order to study roof beam lightweight, three key components dimensions was selected design variables and the reduction of maximum stress of roof beam in different conditions was selected as research objectives. Sample points was selected through experiment design, and response of sample points was calculated by element finite analysis. The introduction of the maximum stress calculation von Newton interpolation method explored in order to improve the efficiency of the whole frame structure optimization

5. Based on the response surface method, a maximum stress of the top beam approximation model was established, and the response surface model was proven. Response surface model solved the time-consuming problem and low efficiency von high accuracy finite element calculation during the structural optimization of hydraulic support beam. Thus improving the efficiency of optimization. The optimization research of hydraulic support roof beam provided ideas and methods for optimization of entire frame structure and other components.

Key words: hydraulic support, secondary development, roof beam, agent model, structure optimization