摘要
作用于工程结构上的动载荷由于环境等限制难以通过直接测量的方式获取,基于动响应信息间接识别或重构动载荷已成为一种十分有效的途径。动载荷识别经过数十年的发展,已经形成了一系列行之有效的方法。本文总结了动载荷识别方法的研究历程及主要成果,系统性阐述了典型时、频域方法以及基于函数拟合思想、正则化策略、贝叶斯框架、数据驱动等动载荷识别方法,并讨论了各方法的优缺点以及适用范围。此外,还针对载荷识别过程中普遍存在的结构参数不确定问题以及输入条件不确定问题进行了总结。动载荷位置识别也是动载荷识别问题的重要组成部分,本文对现有位置识别方法进行了归纳分析。探讨了动载荷识别方法的工程应用,并分析了现有方法的局限性。结合当前实际工程应用中日益迫切的需求及动载荷识别领域面临的问题,展望了未来动载荷识别亟需攻克的技术难题以及可能的发展方向和重点领域。
Direct measurement of dynamic loads on engineering structures is challenging due to environmental constraints.Therefore,the indirect identification or reconstruction of dynamic loads,using dynamic response information,has emerged as a highly effective method.Over decades,dynamic load identification has evolved,resulting in a series of valid solutions.This paper begins by reviewing the research history and main achievements of dynamic load identification methods.It provides a systematic exposition of typical frequency domain and time domain methods,as well as dynamic load identification methods which are based on various approaches such as function fitting,regularization strategies,Bayesian frameworks,and data-driven techniques.The advantages and disadvantages,as well as application scope of each method,are also discussed.Additionally,this paper summarizes common issues in the load identification process,including uncertainties in structural parameters and input conditions.Identifying the position of dynamic loads is also a crucial aspect of the dynamic load identification problem.This paper analyzes the methods currently available for position identification.This paper delves into the engineering applications of dynamic load identification methods and analyzes the limitations of current methods.Considering the current challenges in the field of dynamic load identification and the increasing demands in practical engineering applications,the paper anticipates the technical difficulties that need to be addressed.It also discusses potential future development directions and key areas in dynamic load identification.
作者
姜金辉
张方
JIANG Jin‑hui;ZHANG Fang(State Key Laboratory of Mechanics and Control for Aerospace Structures,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China)
出处
《振动工程学报》
EI
CSCD
北大核心
2024年第10期1625-1650,共26页
Journal of Vibration Engineering
基金
国家自然科学基金资助项目(12372066,U23B6009)
江苏高校“青蓝工程”资助项目。
关键词
动载荷识别
数据驱动
不确定性
位置识别
工程应用
dynamic load identification
data‑driven
uncertainties
position identification
engineering applications
