In-plane vibration analysis of parabolic arches having a variable thickness

Temel, Beytullah; Aslan, Timuçin Alp; Noori, Ahmad Reshad

doi:10.1007/s40435-020-00727-7

Cited by 6 publications

(4 citation statements)

References 21 publications

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“…Circular arches are therein considered for simplicity; nevertheless, the study of the behaviour of circular arches may first help to answer the above two basic questions, with which it is dealt here. Further refinements and observations may be derived, in future research, considering more detailed analyses (see, e.g., [46,47]), possibly coupled with additional numerical and model updating approaches, beyond those already produced in [7].…”

Section: Influence Of the Archesmentioning

confidence: 99%

Signal Processing Methodology of Response Data from a Historical Arch Bridge toward Reliable Modal Identification

et al. 2022

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The paper is part of a case study concerning the structural assessment of a historical infrastructure in the local territory, a road three-span reinforced concrete arch bridge over a river, built by the end of World War I (1917). The purpose of the paper is twofold: first, in-situ acquired response data are systematically analysed by specific signal processing techniques, to form a devoted methodological procedure and to extract useful information toward possible interpretation of the current structural conditions; second, the deciphered information is elaborated, in view of obtaining peculiar conceptualisations of detailed features of the structural response, as meant to achieve quantitative descriptions and modelling, for final Structural Health Monitoring (SHM) and intervention purposes. The proposed methodology, integrating self-implemented and adapted classical signal processing methods, and refined techniques, such as Wavelet analysis and ARMA models, assembles a rather general, systematic methodological approach to signal processing, highlighting the capability to extract useful and fundamental information from acquired response data, also endowed of a non-stationary character, toward final structural interpretation, identification and modelling, thus enabling for developing a reliable and effective SHM platform, on strategic ageing infrastructures. For the present case study, non-stationary characteristics of the response signals are revealed and flattened out, to identify the underlying fundamental frequencies of the infrastructure and to advance particular interpretations of its current structural behaviour, informing an enlarging structural consciousness of the bridge at hand.

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Section: Influence Of the Archesmentioning

confidence: 99%

Signal Processing Methodology of Response Data from a Historical Arch Bridge toward Reliable Modal Identification

et al. 2022

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“…Sonlu Fourier-cosinüs-sinüs dönüşümüne dayalı olan bu yöntem, Dubner ve Abate'nin [23] ters dönüşüm metodunun geliştirilmiş halidir. ile verilen Durbin'in formülasyonu uygulanmıştır [17,[24][25][26][27][28][29]. Burada 𝑖 karmaşık sayıyı, 𝑁 𝑇 zaman aralığını, 𝑁 eşit uzaklıkta örgü noktalarının toplam sayısını, 𝑠 𝑘 = 𝑎 + 𝑖𝑘2𝜋/𝑁 𝑇 ise k'nıncı Laplace dönüşüm parametresini ifade etmektedir.…”

Section: Modifiye Edilmiş Durbin Ters Laplace Yöntemiunclassified

Transient Heat Conduction Analysis of a Functionally Graded Sphere

Ulutaş

Yarımpabuç

2021

Bilecik Şeyh Edebali Üniversitesi Fen Bilimleri Dergisi

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Fonksiyonel derecelendirilmiş kalın cidarlı içi boş kürenin hiperbolik ısı iletim modeli kullanılarak geçici rejimdeki analizi ele alınmıştır. Isı iletim katsayısı, yoğunluk ve özgül ısı gibi malzeme özelliklerinin radyal yönde üstel olarak değiştiği kabul edilmiştir. Bu koşullar altında, geleneksel analitik yöntemlerle çözülmesi zor olan değişken katsayılı kısmi diferansiyel denklem elde edilir. Bu diferansiyel denkleme Laplace dönüşümü uygulanarak, Laplace uzayında zamandan bağımsız lineer adi diferansiyel denklem oluşturulur. Daha sonra, diferansiyel denklem Chebyshev Pseudospektral Yöntemi kullanılarak sayısal olarak çözülüp, Modifiye Edilmiş Durbin Ters Dönüşüm Yöntemi kullanılarak zaman uzayındaki çözüm elde edilir. Sıcaklık ve ısı akısının termal gevşeme, bağıl sıcaklık parametrelerine karşı geçici rejimdeki dinamik davranışları metal-seramik karışımı özel bir malzeme için incelenmiş, homojen malzeme ile karşılaştırmalar yapılmıştır. Literatürde mevcut olan çözümler, bu çalışmada elde edilen sonuçları doğrulamak için kullanılmıştır. Bu çalışmada kullanılan birleştirilmiş yöntemin, iyi yapılandırılmış, basit, etkili bir yöntem olduğu gösterilmiştir.

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“…Sherzod et al [28] proposed a method to assess the dynamic characteristics of high-rise structures, taking into account the variability of slopes and the structure thickness in the framework of the one-dimensional theory of viscoelasticity. Temel et al [29] studied free and forced vibration responses of viscoelastic parabolic arches of variable thicknesses. Noori et al [30] presented an efficient numerical procedure for the solution of the dynamic response of functionally graded porous (FGP) beams.…”

Section: Introductionmentioning

confidence: 99%

Research on the Value of Rayleigh Damping Parameter in Explicit and Implicit Integrals for Dynamic Analysis of Large Structures

Chen,

Wang,

Wang

et al. 2024

Buildings

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Rayleigh damping is proportional to the combination of the structural mass matrix and stiffness matrix and is widely used in structural seismic analysis. The accuracy of seismic analysis of nuclear power structures directly depends on the value of the Rayleigh damping parameters. However, the stiffness component of Rayleigh damping is not included in the explicit integral, so the Rayleigh damping in the explicit and implicit integrals needs to be handled differently. LS-DYNA R11.1.0 software provides various calculation methods for the value of the Rayleigh damping parameter in the explicit integral. To investigate the influence of the value of the Rayleigh damping parameter in the explicit and implicit integrals on the results of the dynamic analysis of a nuclear power plant, the AP1000 nuclear island plant is taken as an example, and the explicit and implicit dynamic calculation are carried out respectively for the nuclear power plant, considering the soil–structure interaction. The results show that the Rayleigh damping parameter calculated by different methods in the explicit integral has a large influence on the results of seismic analysis of nuclear power plants. The mass component of Rayleigh damping in the explicit and implicit integrals takes the same value, and the stiffness component of Rayleigh damping in the explicit integrals is taken as the negative of the stiffness component in the implicit integrals. Thus, the results of the two dynamic analyses can be in good agreement. The results provide a reference for the application of Rayleigh damping in the explicit integral for the seismic analysis of nuclear power structures.

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In-plane vibration analysis of parabolic arches having a variable thickness

Cited by 6 publications

References 21 publications

Signal Processing Methodology of Response Data from a Historical Arch Bridge toward Reliable Modal Identification

Signal Processing Methodology of Response Data from a Historical Arch Bridge toward Reliable Modal Identification

Transient Heat Conduction Analysis of a Functionally Graded Sphere

Research on the Value of Rayleigh Damping Parameter in Explicit and Implicit Integrals for Dynamic Analysis of Large Structures

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