表面力仪实验平台的优化设计

论文总字数：22094字

摘 要

关键词：表面力仪，振动，力弹簧，建模分析

Optimal design of the surface forces apparatus platform

02012233 张鹏飞

指导教师 阚亚鲸

Abstract： The experimental results, in the surface forces apparatus (SFA), indicate that the laboratory ambient vibration will have a significant impact on the measurement accuracy of the device. To solve the problem, this work is focusing on the optimization of the SFA platform, and the development of a certain anti-vibration design. With a thorough analysis of the requirements for a SFA measurement, we select the lower disk holder and the attached force spring as the subjects in this work. Several candidate solutions are proposed, each of which the advantages and disadvantages are systematically determined and compared. Specifically in experiments, we employ a laboratory vibrometer to capture the vibration distribution during the SFA experiments. With the building of the database, covering most experimental conditions, the major factor that is responsible for the vibration can be clarified. Theoretically, we build the finite element model for the SFA 2000 device via ANSYS. The vibration simulation, on basis of the measured data, may provide the accurate and visualized results for each anti-vibration mechanism. In addition, due to the integration of the experimental and theoretical methods, the reliability of the final solution in the work can be further improved.

Key words: Surface force apparatus，Vibration，Force of the spring，Modeling Analysis

目 录

第一章 绪论……………………………………………………………………………7

1.1 选题背景…………………………………………………………………………7

1.2 SFA介绍…………………………………………………………………………7

1.2.1表面力测量设备的发展.......................................................................................................7

1.2.2表面力仪2000（SFA2000）...................................................................................................8

1.2.2.1表面力仪的结构..............................................................................................................8

1.2.2.2进给控制与力的测量......................................................................................................9

1.2.2.3多光束干涉测量法(MBI)..............................................................................................10

1.2.2.4法向力的测量................................................................................................................10

1.2.2.5表面力仪的优点............................................................................................................11

1.3 选题意义…………………………………………………………………………………11

第二章 问题分析……………………………………………………………………………12

2.1实验环境..................................................................................................................................12

2.2存在问题..................................................................................................................................12

2.3振源分析..................................................................................................................................12

2.4问题分析..................................................................................................................................13

2.4.1假设可能的影响因素.........................................................................................................13

2.4.1.1光路受到震动的影响....................................................................................................13

2.4.1.2仪器自身产生的影响....................................................................................................13

2.4.1.3环境问题产生的影响....................................................................................................13

2.4.2总结分析.............................................................................................................................13

第三章 具体工作............................................................................................................................14

3.1测振仪的选购..........................................................................................................................14

3.2振动数据测量..........................................................................................................................16

3.2.1实验原理.............................................................................................................................16

3.2.2实验步骤.............................................................................................................................16

3.2.3实验数据处理.....................................................................................................................17

3.2.4实验分析.............................................................................................................................17

3.3减振措施..................................................................................................................................18

3.3.1隔振原理.............................................................................................................................18

3.3.2消极隔振方案.....................................................................................................................18

3.3.3解决方案.............................................................................................................................19

3.4支承式隔振台的设计..............................................................................................................19

3.4.1材料选择.............................................................................................................................19

3.4.2结构设计.............................................................................................................................20

3.5软件分析..................................................................................................................................20

3.5.1软件选择.............................................................................................................................20

3.5.2实体模型的建立.................................................................................................................21

3.5.3ANSYS软件分析................................................................................................................21

3.5.3.1添加材料........................................................................................................................21

3.5.3.2模型简化........................................................................................................................21

3.5.3.3网格划分........................................................................................................................22

3.5.3.4定义边界条件................................................................................................................23

3.5.3.5计算................................................................................................................................23

3.5.4结果分析.............................................................................................................................24

第四章 总结....................................................................................................................................25

致谢……………………………………………………………………………………………25

参考文献………………………………………………………………………………………26

表面力仪测量平台的优化设计

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