Correlating low energy impact damage with changes in modal parameters: diagnosis tools and FE validation [PDF]
, 2010 This paper presents a basic experimental technique and simplified FE based models for the detection, localization and quantification of impact damage in composite beams around the BVID level.
Niemann, Hanno +7 more
core +1 more source
Correlating low energy impact damage with changes in modal parameters: a preliminary study on composite beams [PDF]
, 2009 This paper is an experimental study of the effects of multi-site damage on the vibration response of a composite beam damaged by low energy impact. The variation of the modal parameters with different levels of impact energy and density of impact is ...
Morlier, Joseph +2 more
core +1 more source
Monitoring the effects of impact damages on modal parameters in carbon fiber entangled sandwich beams [PDF]
, 2009 The aim is to study the impact toughness of two types of entangled sandwich materials (heavy and light) with the help of vibration testing. A simple case of symmetrical impacts is studied in this article as no literature is available regarding impact ...
Bouvet, Christophe +4 more
core +1 more source
Structural Damage Identification Using a Modified Directional Bat Algorithm
Applied Sciences, 2021 Bat algorithm (BA) has been widely used to solve optimization problems in different fields. However, there are still some shortcomings of standard BA, such as premature convergence and lack of diversity.
Yonghui Su, Lijun Liu, Ying Lei
doaj +1 more source
Experimental research on the vibration characteristics of canvas and primed canvas of paintings [PDF]
Archive of Mechanical Engineering, 2023 Paintings inevitably bear severe mechanical loads during transportation.Understanding the dynamic characteristics of paintings helps to avoid damage during transportation and to effectively slow down their aging.In this contribution, the vibration ...
Yulong Gao +4 more
doaj +1 more source
Damage monitoring in sandwich beams by modal parameter shifts: a comparative study of burst random and sine dwell vibration testing [PDF]
, 2010 This paper presents an experimental study on the effects of multi-site damage on the vibration response of honeycomb sandwich beams, damaged by two different ways i.e., impact damage and core-only damage simulating damage due to bird or stone impact or ...
Morlier, Joseph +2 more
core +1 more source
NUMERICAL AND EXPERIMENTAL CONSIDERATION OF FREQUENCY DOMAIN DECOMPOSITION METHOD FOR MODAL PARAMETERS IDENTIFICATION OF STRUCTURE [PDF]
مجله مدل سازی در مهندسی, 2010 Classical modal testing of large structures such as bridges, towers and building is encountered with some problems such as exciting the structure and noisy environment.
محمد مهدی Khatibi +2 more
doaj +1 more source
Frontiers in Built Environment, 2020 Operational modal analysis (OMA), also known as output-only or ambient vibration test (AVT), has become in last decades a powerful approach for a wide range of applications in the field of civil engineering.
G. Lacanna +3 more
doaj +1 more source
Identification Method of Modal Parameters of Machine Tools Under Periodic Cutting Excitation
IEEE Access, 2020 The dynamics of a machine tool have an important influence on the quality and efficiency of the machining process. In this paper, the modal parameters identification method of machine tools under normal cutting excitation is proposed based on the fact ...
Ling Yin +7 more
doaj +1 more source
Vibroacoustics of the piano soundboard : (Non)linearity and modal properties in the low- and mid-frequency ranges [PDF]
, 2013 The piano soundboard transforms the string vibration into sound and therefore, its vibrations are of primary importance for the sound characteristics of the instrument.
RÉBILLAT, Marc +2 more
core +1 more source