Multiple Impact Phenomenon in Impact Hammer Testing:Theoretical Analysis and Numerical Simulation
作者机构：Department of Engineering MechanicsZhejiang UniversityHangzhou310027China Hangzhou Zhongpu Technology Co.Ltd.Hangzhou310012China Pengcheng LabShenzhen518055China
出 版 物：《Acta Mechanica Solida Sinica》 (固体力学学报（英文版）)
年 卷 期：2021年第34卷第6期
页 面：830-843页
核心收录：
学科分类：07[理学] 0701[理学-数学] 070101[理学-基础数学]
基 金：the National Natural Science Foundation of China under Grant Nos.11872328 11532011 and 11621062
主 题：Impact hammer testing Modal analysis Multiple impact Theoretical analysis Numerical simulation
摘 要：As conducting an impact hammer testing during experimental modal analysis,the multiple impact phenomenon must be *** is generally recognized that the multiple impact phenomenon is induced by the tester’s improper operation and can be avoided through more careful *** study theoretically and numerically investigates the whole process of the dynamical interaction between the hammer tip and the impacted structure and discovers the intrinsically physical mechanism of the multiple impact *** determination of the interacting process comes down to solve two sets of governing differential equations alternately,and the effectiveness of the theoretical analysis is validated by numerical *** dimensionless parameters governing the interacting process are recognized in the theoretical *** critical stiffness ratio for a given impacted location and the critical impacted location for a given stiffness ratio are analytically *** results can guide impact hammer testing to avoid the occurrence of multiple impact by suggesting the hammer tip and impacted locations.
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