Advances in Acoustics and Vibration最新文献_第9页

Static and Dynamic Characteristics of Composite Conoidal Shell Roofs 复合锥形壳屋盖的静动力特性

Advances in Acoustics and Vibration Pub Date : 2013-12-03 DOI: 10.1155/2013/539817

K. Bakshi, D. Chakravorty

引用次数: 3

Differential Evolution: An Inverse Approach for Crack Detection 差分演化:裂纹检测的一种逆方法

Advances in Acoustics and Vibration Pub Date : 2013-11-13 DOI: 10.1155/2013/321931

P. K. Jena, D. Thatoi, D. Parhi

引用次数: 14

Biomass from Paddy Waste Fibers as Sustainable Acoustic Material 稻谷废纤维生物质作为可持续声学材料

Advances in Acoustics and Vibration Pub Date : 2013-11-07 DOI: 10.1155/2013/605932

A. Putra, Yasseer Abdullah, Hady Efendy, W. Mohamad, Norliana Salleh

引用次数: 35

Autocorrelation Analysis in Time and Frequency Domains for Passive Structural Diagnostics 被动结构诊断的时频域自相关分析

Advances in Acoustics and Vibration Pub Date : 2013-10-27 DOI: 10.1155/2013/204878

S. Goto, Yoshinori Takahashi, M. Tohyama

{"title":"Autocorrelation Analysis in Time and Frequency Domains for Passive Structural Diagnostics","authors":"S. Goto, Yoshinori Takahashi, M. Tohyama","doi":"10.1155/2013/204878","DOIUrl":"https://doi.org/10.1155/2013/204878","url":null,"abstract":"In this paper, modal frequency estimation by using autocorrelation functions in both the time and frequency domains for structural diagnostics is discussed. With popular structural health monitoring methods for periodic inspections such as with the “hammering test,” hearing is very useful for distinguishing differences between structural conditions. Hearing detects pitch and tone, and it is known that the auditory process is related to wave periodicity calculated from autocorrelation functions. Consequently, on the basis of the hammering test, modal frequencies can be estimated by autocorrelation, the same as hearing. In this paper, modal frequencies were estimated by using autocorrelation for constant structural health monitoring under a nonstationary noise condition. First, fundamental modal frequencies were estimated by using the autocorrelation of the time domain which was inspired by pitch detection of hearing. Second, higher modal frequency compositions were also analyzed by using autocorrelation in the frequency domain as with tones discrimination. From the results by conducting scale-model experiments under unknown nonstationary noise conditions, periods of fundamental modal frequency were derived by using periods histogram of autocorrelation functions. In addition, higher modal frequency estimation under nonstationary noises was also discussed.","PeriodicalId":44068,"journal":{"name":"Advances in Acoustics and Vibration","volume":"2013 1","pages":"1-8"},"PeriodicalIF":0.0,"publicationDate":"2013-10-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1155/2013/204878","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"64390769","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Diffraction of a Plane Elastic Wave by a Gradient Transversely Isotropic Layer 横向各向同性梯度层对平面弹性波的衍射

Advances in Acoustics and Vibration Pub Date : 2013-10-26 DOI: 10.1155/2013/262067

A. Anufrieva, D. Tumakov

引用次数: 15

Three-Dimensional Investigation of the Stokes Eigenmodes in Hollow Circular Cylinder 空心圆柱Stokes本征模态的三维研究

Advances in Acoustics and Vibration Pub Date : 2013-10-08 DOI: 10.1155/2013/857821

A. E. Baroudi, F. Razafimahery

引用次数: 0

An Investigation of Structural Damage Location Based on Ultrasonic Excitation-Fiber Bragg Grating Detection 基于超声激励-光纤光栅检测的结构损伤定位研究

Advances in Acoustics and Vibration Pub Date : 2013-09-23 DOI: 10.1155/2013/525603

Yuegang Tan, L. Cai, Bei Peng, Lijun Meng

{"title":"An Investigation of Structural Damage Location Based on Ultrasonic Excitation-Fiber Bragg Grating Detection","authors":"Yuegang Tan, L. Cai, Bei Peng, Lijun Meng","doi":"10.1155/2013/525603","DOIUrl":"https://doi.org/10.1155/2013/525603","url":null,"abstract":"With the continuous development of mechanical automation, the structural health monitoring techniques are increasingly high requirements for damage detection. So structural health monitoring (SHM) has been playing a significant role in terms of damage prognostics. The main contribution pursued in this investigation is to establish a detection system based on ultrasonic excitation and fiber Bragg grating sensing, which combines the advantages of the ultrasonic detection and fiber Bragg grating (FBG). Differencing from most common approaches, a new way of damage detection is based on fiber Bragg grating (FBG), which can easily realize distributed detection. The basic characteristics of fiber Bragg grating sensing system are analyzed, and the positioning algorithm of structural damage is derived in theory. On these bases, the detection system was used to analyze damage localization in the aluminum alloy plate of a hole with diameters of 6 mm. Experiments have been carried out to demonstrate that the sensing system was feasible and that the estimation method of the location algorithm was easy to implement.","PeriodicalId":44068,"journal":{"name":"Advances in Acoustics and Vibration","volume":"2013 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2013-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1155/2013/525603","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"64139565","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 6

Normal Incidence of Sound Transmission Loss of a Double-Leaf Partition Inserted with a Microperforated Panel 插入微孔板的双叶隔板声传输损失的正常发生率

Advances in Acoustics and Vibration Pub Date : 2013-09-04 DOI: 10.1155/2013/216493

A. Putra, A. Y. Ismail, R. Ramlan, R. Ayob

引用次数: 18

The Effect of Uncertainty in the Excitation on the Vibration Input Power to a Structure 激励不确定性对结构振动输入功率的影响

Advances in Acoustics and Vibration Pub Date : 2013-08-27 DOI: 10.1155/2013/478389

A. Putra, B. Mace

{"title":"The Effect of Uncertainty in the Excitation on the Vibration Input Power to a Structure","authors":"A. Putra, B. Mace","doi":"10.1155/2013/478389","DOIUrl":"https://doi.org/10.1155/2013/478389","url":null,"abstract":"In structural dynamic systems, there is inevitable uncertainty in the input power from a source to a receiver. Apart from the nondeterministic properties of the source and receiver, there is also uncertainty in the excitation. This comes from the uncertainty of the forcing location on the receiver and, for multiple contact points, the relative phases, the force amplitude distribution at those points, and also their spatial separation. This paper investigates quantification of the uncertainty using possibilistic or probabilistic approaches. These provide the maximum and minimum bounds and the statistics of the input power, respectively. Expressions for the bounds, mean, and variance are presented. First the input power from multiple point forces acting on an infinite plate is examined. The problem is then extended to the input power to a finite plate described in terms of its modes. The uncertainty due to the force amplitude is also discussed. Finally, the contribution of moment excitation to the input power, which is often ignored in the calculation, is investigated. For all cases, frequency band-averaged results are presented.","PeriodicalId":44068,"journal":{"name":"Advances in Acoustics and Vibration","volume":"2013 1","pages":"1-18"},"PeriodicalIF":0.0,"publicationDate":"2013-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1155/2013/478389","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"64425289","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Anomalous Dispersion of the Lamb Mode Lamb模式的反常色散

Advances in Acoustics and Vibration Pub Date : 2013-08-06 DOI: 10.1155/2013/903934

F. Ahmad, T. Hussain

引用次数: 0