冲压机床运行对周边建筑物的环境振动影响研究(任务书,开题报告,论文13000字)
摘要
随着工业化生产的迅速发展，各种机械大量投入使用，但随之引起的环境噪声和振动污染问题也日益凸显。其中，冲压机床运行时对周边的环境振动问题已引起了人们的关注和投诉，本文以某冲压机床及其相邻轻钢结构厂房为研究对象，通过现场测试和数值模拟相结合的方法来探究冲压机床振动的特性和传播规律，并建议有效的隔振措施，对有效治理这种环境振动问题具有重要的指导意义。
论文主要研究了冲压机床运行引起的环境振动问题，主要工作包括：
（1）通过现场测试采集了振源处及周边建筑物的振动响应，并对实测数据进行分析探明了冲压机床振动的特性和传播规律，并结合国家标准规范对冲压机床运行引起的周边建筑物的环境振动影响进行了评价。
（2）结合某冲压机床的地质和设计资料，基于SASSI2000软件建立了土体与结构相互作用的计算模型，分析了冲压机床运行引起的地面振动的特性和传播规律。
（3）基于实测和数值结果，建议了合理有效的隔振措施。
研究结果表明：该类冲压机床运行对周边建筑物的环境振动影响以低频振动为主，传播距离越远，振动响应越小。尽管轻钢结构厂房地面振动未超标，但由于主频段与轻钢结构固有频率接近，易导致建筑物振动放大，引起不舒适性问题。
本文的特色：结合实际工程问题，探明了冲压机床运行对周边建筑物的环境振动影响，以及其振动特性和传播规律。
关键词：冲压机床；环境振动；加速度响应；传播规律；隔振
Abstract
With the rapid development of industrial production, all kinds of machinery and large investment had been used,but environmental vibration and noise pollution problems have become increasingly prominent,too. Among them, the surrounding environmental vibration problem caused by the punching machine operationhas attracted attention and complaints, taking a punching machine and its adjacent light steel plant as the research object, by the method of the combination of field test and numerical simulation,the stamping machine vibration characteristics and propagation are studied, and suggest effectivemeasures for vibration isolation and has important guiding significance for effective governance to the environmental vibration problem.
The paper mainly studies the environmental vibration caused by the operation of the press,andmachine,main tasks include:
(1)Through the field test,the responses at the vibration source and the surrounding buildings were collected, and the analysisof the data provedcharacteristics and propagation of punching machine vibration and combined with the national standard,ambient vibration of surrounding buildings caused by the operation of punching machine were evaluated.
(2)Combining with the geology and design data of a punching machine, the calculation model of interaction between soil and structure is established based on SASSI2000 software, and the characteristics and propagation law of ground vibration caused by the operation of punching machine are analyzed
(3)Based on the measured and numerical results, reasonable and effective vibration isolation measures are suggested
The results show that: the effect of environmental vibration on the surrounding buildings of this kind of stamping machine running is in low frequency vibration.The propagation distance is farther, and vibration is smaller.
Although the light steel structure workshop ground vibration does not exceed the standard, but due to its proximity of the main frequency to natural frequency of the light steel structure,it is easy to cause the building vibration amplification and the problem of comfort.
The characteristics of this paper: combined with the actual engineering problems, the impact of ambient vibration of surrounding buildings caused by the operation of punching machine is proved, and the vibration characteristics and propagation law of the machine are also discussed
Key words: stamping machine; ambient vibration; acceleration response; propagation law; vibration isolation
目录
第一章绪论 1
1.1 研究背景及意义 1
1.2国内外研究现状 2
1.3本文所做的主要工作 3
第二章冲压机床振动的实测分析 4
2.1测量对象 4
2.2振源处测点布置 5
2.3某轻钢结构厂房的测点布置 6
2.3.1窗户旁地面 6
2.3.2电梯井附近地面 7
2.3.3过道地面 8
2.4测试结果 9
2.4.1振源处的测试结果 9
2.4.2周边建筑物的测试结果 10
2.5冲压机床振动特征和传播规律 14
2.6冲压机床振动的环境影响评价 15
2.7本章小结 15
第三章冲压机床引起地面振动的数值模拟 16
3.1计算模型 16
3.1.1建立土层模型 16
3.1.2建立冲压机床基础有限元模型 17
3.1.3冲压机床基础模型参数 17
3.2输入荷载与施加方法 18
3.3 时间步长 18
3.4计算结果分析 19
3.4.1地面加速度响应 20
3.4.2地面振动频率成分 20
3.5本章小结 20
第四章建议隔振方案 21
4.1隔振方案优选 21
4.2碟形弹簧缓冲器 21
4.3硬性材料填充沟 23
4.4本章小结 23
第五章结论与展望 24
5.1结论 24
5.2展望 24
参考文献 26
致谢 28
|
