利用相频曲线求解模型基础动力参数的探讨
摘要:通过正向理论推导和数据反算验证相结合的方式，得到利用峰值频率前幅频响应曲线和相频响应曲线求解模型基础动力参数的方法。以根据实测曲线求解所得动力参数反算其理论幅频曲线和相频曲线，若理论曲线贴近实测曲线，表明求解所得动力参数能够代表所测地基与模型基础振动系统的动力特性；若理论曲线偏离实测曲线，则要检查动力参数计算方法的正确性及数据取值的代表性；即使激振器的扰频能够覆盖共振频率，在测量振动幅值、得到幅频曲线的同时监测激励与响应的相位差、得到相频曲线也具有重要意义；利用回归反射式光电开关及自动化测试仪器，可以方便地测量激振力与振动位移的相位差，在测试过程中同步显示幅频曲线和相频曲线。
Abstract:Through the combination of forward theory derivation and data inverse verification, the method for solving the dynamic parameters of the model foundation is obtained by using the amplitude-frequency response curve and phase-frequency response curve before peak frequency. It is pointed out that the theoretical amplitude-frequency curve and phase-frequency curve are reversed by the dynamic parameters solved by the above method, and if the theoretical curve is close to the measured curve, it can be shown that the dynamic parameters obtained by solving can represent the dynamic characteristics of the measured vibration system of the foundation soil and the model foundation. If the theoretical curve deviates from the measured curve, the correctness of the calculation method and the representativeness of the data value should be checked. It is pointed out that even if the disturbance frequency of the exciter can cover the resonance frequency, it is also of great significance to measure the vibration amplitude and obtain the amplitude-frequency curve while monitoring the phase difference between the excitation and response, and obtaining the phase frequency curve. Using the regressive reflection photoelectric switch and automatic test instrument, the phase difference between the excitation force and the vibration displacement can be easily measured, and the amplitude-frequency curve and the phase frequency curve can be displayed synchronously during the test.
中文标题：
利用相频曲线求解模型基础动力参数的探讨
Discussion on Using Phase-frequency Curve to Solve the Dynamic Parameters of the Model Foundation
作者：
陈小峰,胡胜波
Chen Xiaofeng,Hu Shengbo
作者简介:陈小峰，男，1970年生，大学本科，研究员级高级工程师，注册土木工程师（岩土）。主要研究方向为物探、岩土工程测试、地基基础工程检测等。E-mail：1259552073@qq.com
通讯地址：
河北中核岩土工程有限责任公司，河北石家庄 050021
HebeiNuclearIndustryofChinaGeotechnicalEngineeringCo.Ltd.,Shijiazhuang050021,Heibei,China
中图分类号:TU 435
doi:10.3969/j.issn.1007-2993.2023.06.002
出版物：岩土工程技术
收稿日期:2022-12-06
修回日期:2023-05-06
录用日期:2023-07-14
刊出日期:2023-12-08
关键词:模型基础动力参数,测试,幅频曲线,相频曲线,光电开关
Key words:dynamic parameter of model foundation,testing,amplitude-frequency curve,phase-frequency curve,photoelectric switch
文档包含图片数量：图片(9)张
文档包含表格数量：表格(5)个
参考文献：
[1]SINGIRESU S. RAO. 机械振动(第4版)[M]. 李欣业, 张明路, 译. 北京: 清华大学出版社, 2009.
[2]顾海明, 周勇军. 机械振动理论与应用[M]. 南京: 东南大学出版社, 2007.
[3]GB/T 50269—2015 地基动力特性测试规范[S]. 北京: 中国计划出版社, 2015.
[4]严人觉, 王贻荪, 韩清宇. 动力基础半空间理论概论[M]. 北京: 中国建筑工程出版社, 1981.
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