Cost Optimized Non-Contacting Experimental Modal Analysis Using a Smartphone

作     者：Jaafar Hallal Mohammad Hammoud Mahmoud Fakih Ali Hallal 

作者机构：Mechanical Engineering DepartmentFaculty of EngineeringLebanese UniversityBeirutLebanon SDM Research GroupMechanical Engineering DepartmentInternational University of BeirutBeirutLebanon Mechanical Engineering DepartmentLebanese International UniversityBekaaLebanon Civil Engineering DepartmentFaculty of EngineeringLebanese UniversityBeirutLebanon 

出 版 物：《Sound & Vibration》 (声音与振动（英文）)

年 卷 期：2020年第54卷第4期

页      面：225-236页

核心收录：

学科分类：1201[管理学-管理科学与工程(可授管理学、工学学位)] 1002[医学-临床医学] 08[工学] 0837[工学-安全科学与工程] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0802[工学-机械工程] 0823[工学-交通运输工程] 0702[理学-物理学] 0801[工学-力学（可授工学、理学学位）] 

主　　题：Experimental measurement motion magnification smartphone vibrations mode shape natural frequency 

摘      要：The vibrations behavior analysis is an essential step in the mechanical design *** methods such as analytical modelling,numerical analysis and experimental measurements can be used for this ***,the numerical or analytical models should be validated through experimental measurements,usually *** paper introduces an inexpensive smartphone as an accurate,non-intrusive vibrations’behavior measurement *** experimental measurement procedure based on the video processing method is *** procedure allows the measurement of the natural frequencies and the mode shapes of a vibrating structure,simply by using a smartphone built-in *** experimental results are compared to those obtained using an accurate analytical model,where the natural frequencies error is less than 2.7%and the modal assurance criterion is higher than *** order to highlight the obtained results,a comparison has been done using a high quality and high frame per second(fps)camera-based measurement of material *** the highest recovered natural frequency and its associated mode shape depend on the frame per second rate of the recorded video,this procedure has great potential in low frequencies problems such as for big structures like buildings and *** validated technique re-introduces the personal smartphone as an accurate inexpensive non-contacting vibration measurement tool.