摘要：本课题是对奉贤校区车行桥二进行测量分析，然后建立有限元的模型，我们选择的是使用实体单元进行的建模，学习并使用ANSYS软件，主要使用有限元分析并计算，然后用DASP信号测量软件对模型进行动力测试得到试验结果，其中包括桥梁的频率，阻尼等等，将得到的结果与ANSYS有限元分析的结果进行比对，如果有分析误差，则对有限元模型进行修正，从而得到正确的有限元模型。在使用DASP信号测量软件测量模态参数的时候，可以获取桥梁的各阶频率，进行单双通道测试分析。 在后面会进行模态分析比较，修改模型参数，进行模型修正，肯定存在不少不确定性误差。本文尝试研究以上技术来减少以后测量的不确定性，为之后测量简支梁桥提供便捷，也使测量不在单一化，丰富测量方法，使其更好的用于实践中去。70033
毕业论文关键词：桥梁；模态分析；ANSYS建模；模型修正
Two - Inherent Modal Analysis of Vehicle - bridge in Fengxian Campus
Abstract:This paper is to analyze the traffic bridge of Fengxian campus, and then establish the model of finite element. We choose the modeling of the entity unit, learn and use ANSYS software, mainly use the finite element analysis and calculation, and then use DASP The results of the ANSYS finite element analysis are compared with the results of ANSYS finite element analysis. If there are analytical errors, the finite element model is modified, and the finite element model is used to modify the model. So as to get the correct finite element model. When using the DASP signal measurement software to measure the modal parameters, the frequency of the bridge can be obtained for single and dual channel test analysis. In the later will be modal analysis and comparison, modify the model parameters, the model correction, there must be a lot of uncertainty error. This paper attempts to study the above techniques to reduce the uncertainty of later measurements, to facilitate the subsequent measurement of simple beam bridge, but also to make the measurement is not a single, rich measurement methods to make it better for practice.
Keywords：Bridge; modal analysis; ANSYS modeling; model correction
目录
1. 绪论 1
1.1 课题的目的 1
1.2 课题的意义 1
1.3研究范围及技术水平 1
1.5发展趋势 3
1.6本课题应解决的问题 4
2.桥梁实验的基本情况 5
2.1基本内容 5
2.2实验重点 5
2.3难点分析 5
3.桥梁模态的分析 6
3.1 DASP信号分析软件 6
3.1.1软件的主要功能 6
3.1.2使用器材 6
3.2 模态分析的步骤 6
3.2.1 拟采取的方法和技术 6
3.2.2测点的选取和传感器的布置 7
3.2.3仪器的连接 8
3.2.4实验过程 8
3.2.5实验现场的一些照片 9
3.3模态分析数据处理 12
3.3.1 DASP软件开始 ANSYS奉贤校区车行桥二固有模态分析:http://www.751com.cn/guanli/lunwen_79149.html