基于零初值的测试加速度积分速度与位移的方法
发布时间：2018-12-12 20:43
【摘要】：在地震工程、结构振动控制和结构健康监测等研究领域,结构在振动过程中的位移和速度对科学研究和实际工程应用都具有重要意义.由于技术条件及环境因素限制,测试过程中获得的大多为加速度响应信号,需要通过积分获得速度及位移.但是由于初始条件的缺失,导致了测试加速度信号在积分速度和位移过程中产生明显的漂移现象.为解决此问题,本文利用结构的振动规律,在稳态振动阶段寻找速度和位移的零点,并以此作为初值进行积分,最后利用趋势项处理去除零点确定误差产生的漂移.本文数值模拟了单自由度体系和多自由度体系在简谐振动和地震动作用下的结构振动响应,并比较了计算值与准确值的最大相对误差;最后,将该方法应用于5条具有代表性的真实地震动记录,与给出的地面速度和位移进行比较,结果显示在极值处的最大相对误差均小于3%,表明该方法具有较高的计算精度和实际应用价值.
[Abstract]:In the fields of seismic engineering, structural vibration control and structural health monitoring, the displacement and velocity of structure in vibration process are of great significance for scientific research and practical engineering application. Due to the limitation of technical conditions and environmental factors, most of the signals obtained in the testing process are acceleration response signals, and the velocity and displacement need to be obtained by integration. However, due to the absence of initial conditions, the acceleration signal drift obviously in the process of integral velocity and displacement. In order to solve this problem, this paper uses the vibration law of the structure to find the zero point of velocity and displacement in the steady state vibration stage, and takes it as the initial value to carry on the integral, finally uses the trend term processing to remove the zero point to determine the drift which the error produces. In this paper, the structural vibration responses of single-degree-of-freedom system and multi-degree-of-freedom system under the action of harmonic vibration and ground motion are numerically simulated, and the maximum relative error between the calculated value and the accurate value is compared. Finally, the method is applied to five representative real ground motion records. The results show that the maximum relative error at the extremum is less than 3, compared with the given ground velocity and displacement. It shows that this method has high accuracy and practical application value.
【作者单位】： 大连理工大学土木工程学院海岸及近海工程国家重点实验室;
【基金】：国家自然科学基金创新研究群体项目(批准号:51121005);国家自然科学基金项目(批准号:51578107)资助 国家重点基础研究发展计划(编号:2015CB057704)
【分类号】：TU317
本文编号：2375219
[Abstract]:In the fields of seismic engineering, structural vibration control and structural health monitoring, the displacement and velocity of structure in vibration process are of great significance for scientific research and practical engineering application. Due to the limitation of technical conditions and environmental factors, most of the signals obtained in the testing process are acceleration response signals, and the velocity and displacement need to be obtained by integration. However, due to the absence of initial conditions, the acceleration signal drift obviously in the process of integral velocity and displacement. In order to solve this problem, this paper uses the vibration law of the structure to find the zero point of velocity and displacement in the steady state vibration stage, and takes it as the initial value to carry on the integral, finally uses the trend term processing to remove the zero point to determine the drift which the error produces. In this paper, the structural vibration responses of single-degree-of-freedom system and multi-degree-of-freedom system under the action of harmonic vibration and ground motion are numerically simulated, and the maximum relative error between the calculated value and the accurate value is compared. Finally, the method is applied to five representative real ground motion records. The results show that the maximum relative error at the extremum is less than 3, compared with the given ground velocity and displacement. It shows that this method has high accuracy and practical application value.
【作者单位】： 大连理工大学土木工程学院海岸及近海工程国家重点实验室;
【基金】：国家自然科学基金创新研究群体项目(批准号:51121005);国家自然科学基金项目(批准号:51578107)资助 国家重点基础研究发展计划(编号:2015CB057704)
【分类号】：TU317
【相似文献】
相关期刊论文 前8条
1 赵善斋;高彩苓;;结构静力试验位移测量误差分析[J];强度与环境;1987年06期
2 李威宣,李明;光导纤维在载荷测量及角位移测量中的应用[J];光学技术;1999年01期
3 潘国荣;;位移测量反演分析的解算模型与应用[J];大地测量与地球动力学;2006年02期
4 杨枫;;基坑一站式水平位移测量与数据处理方法[J];福建建筑;2011年10期
5 陆施福;使用NA2+GPM3进行二等垂直位移测量[J];电力勘测;1997年01期
6 张剑;叶见曙;赵新铭;;基于Novozhilov理论连续弯箱位移参数的动态Bayes估计[J];应用数学和力学;2007年01期
7 王孟穹;刘华夏;尚金光;;一种特定方向上位移测定的简易方法[J];测绘地理信息;2014年04期
8 ;[J];;年期
相关会议论文 前1条
1 侯杰;钱稼茹;赵作周;潘鹏;;基于视频图像和神经网络技术的位移测量研究[A];第六届全国土木工程研究生学术论坛论文集[C];2008年
，本文编号：2375219
本文链接：https://www.wllwen.com/jingjilunwen/jianzhujingjilunwen/2375219.html
