Distributed Dynamic Load in Structural Dynamics by the Impulse-Based Force Estimation Algorithm  

作　　者：Yuantian Qin Yucheng Zhang Vadim V.Silberschmidt 

机构地区：[1]College of Astronautics,Nanjing University of Aeronautics and Astronautics,Nanjing,210016,China [2]Wolfson School of Mechanical,Electrical and Manufacturing Engineering,Loughborough University,Loughborough,LE113TU,UK

出　　处：《Computer Modeling in Engineering & Sciences》2024年第6期2865-2891,共27页工程与科学中的计算机建模（英文）

摘　　要：This paper proposes a novel approach for identifying distributed dynamic loads in the time domain.Using polynomial andmodal analysis,the load is transformed intomodal space for coefficient identification.This allows the distributed dynamic load with a two-dimensional form in terms of time and space to be simultaneously identified in the form of modal force,thereby achieving dimensionality reduction.The Impulse-based Force Estimation Algorithm is proposed to identify dynamic loads in the time domain.Firstly,the algorithm establishes a recursion scheme based on convolution integral,enabling it to identify loads with a long history and rapidly changing forms over time.Secondly,the algorithm introduces moving mean and polynomial fitting to detrend,enhancing its applicability in load estimation.The aforementioned methodology successfully accomplishes the reconstruction of distributed,instead of centralized,dynamic loads on the continuum in the time domain by utilizing acceleration response.To validate the effectiveness of the method,computational and experimental verification were conducted.

关 键 词：Distributed force estimation time domain DECONVOLUTION RECURSION 

分 类 号：TU311.3[建筑科学—结构工程] TP3[自动化与计算机技术—计算机科学与技术]