A computational framework for propagated waves in a sandwich doubly curved nanocomposite panel

Al-Furjan, M.S.H.; Habibi, Mostafa; Jung, Dong Won; Sadeghi, Seyedehfatemeh; Safarpour, Hamed; Tounsi, Abdelouahed; Chen, Guojin

doi:10.1007/s00366-020-01130-8

Cited by 96 publications

(24 citation statements)

References 125 publications

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“…where q denotes the reaction force of soil foundation, and S l1 dσz , S l1 uσz , S l2 dσz , and S l2 uσz are determined by Equation (14). e equivalent stiffness matrix between reaction force q of the layered soil foundation and displacement w b of the viscoelastic Euler beam can be obtained in accordance with Equation (23).…”

Section: Mathematical Problems In Engineering a S L2mentioning

confidence: 99%

“…As far as the tunnel structure due to a moving load is concerned, the wave vectors of viscoelastic beam layer can be solved by Equation (22) and the others by Equations (19) and (20). Finally, the displacement and stress with respect to the frequency wave-number solution can be derived by Equation (14). Universally, all variables in the frequency wavenumber domain are expressed by Ω as follows:…”

Section: Mathematical Problems In Engineering a S L2mentioning

confidence: 99%

“…As we know, natural soil with different deposition ages are always layered form, so the layered soil foundation model is closer to the actual engineering. ere are a variety of analytical and numerical methods to solve the dynamic response of a layered half-space [14]. Tomson [15] and Harkrider [16] formed and developed the transfer matrix method of layered soil based on the finite element thin layer method.…”

Section: Introductionmentioning

confidence: 99%

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Analysis of the Vibration of the Ground Surface by Using the Layered Soil: Viscoelastic Euler Beam Model due to the Moving Load

Hong-yuan

Zhao

Rong

et al. 2021

Mathematical Problems in Engineering

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Moving loads will have a certain impact on the safety of the structures. Since concrete is a viscoelastic material, the elastic concrete model cannot describe its viscoelastic characteristics under moving loads. It is necessary to establish a model that can describe the viscoelastic characteristics of concrete materials. In addition, the layered of the soil is also an important factor affecting the propagation of subway vibration waves. Considering the effects of the properties of the concrete material of the subway tunnel structure and the layered soil foundation as well as the load velocity on the vibration of the ground surface caused by the moving load, the standard linear elastic solid Euler beam model is described for the subway tunnel structure in this paper. The equivalent stiffness of the layered soil-viscoelastic beam coupling system subjected to a moving load is formed by using the transmission and reflection matrix (TRM) method. The numerical solution of ground surface displacement caused by subway tunnel in time-space domain is obtained by IFFT algorithm. The correctness of the algorithm is verified by comparing with the reference results. Numerical results show that, with the increase of the viscous coefficient of the viscoelastic Euler beam, the vibration amplitude of the ground surface will decrease. Up to a certain value of the increasing the viscous coefficient of the Euler beam, it will have little effect on the vibration amplitude of the ground surface. Therefore, the standard solid model of viscoelastic Euler beam can well describe the creep and relaxation of materials. The model of viscoelastic beam is reasonable for the working condition of subway tunnel concrete structure. At high speed of moving load, the maximum value of ground surface displacement spectrum will appear at the smaller frequency domain and the maximum value of displacement spectrum will also increase for the soft layer soil, while it is opposite to that of the stiffer layer soil.

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Section: Mathematical Problems In Engineering a S L2mentioning

confidence: 99%

Section: Mathematical Problems In Engineering a S L2mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Analysis of the Vibration of the Ground Surface by Using the Layered Soil: Viscoelastic Euler Beam Model due to the Moving Load

Hong-yuan

Zhao

Rong

et al. 2021

Mathematical Problems in Engineering

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“…Z ð2Þ Z ð3Þ (38) Here . Analytical and simulation results of normalized interface shear stress amplitude and interfacial shear delamination interval in excitation frequency domain as the accretion frost layer thickness is 0.1 mm, the substrate aluminum plate thickness is 1 mm, and ½r À1 ð1Þ ¼ 10.…”

Section: Forced Propagation Solutions Of Interfacial Shear Stress Of mentioning

confidence: 99%

Coupling resonance mechanism of interfacial stratification of sandwich plate structures excited by SH waves

Guo

2020

Journal of Low Frequency Noise, Vibration and Active Control

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For interfacial stratification mechanism of sandwich plate structures, the forced propagation solution of interface shear stress excited by SH waves is derived by global matrix methods and integral transformation methods. The necessary condition of interfacial shear delamination excited by alternating stress is analyzed with the interface fatigue failure theory. The exact value of forced propagation solution is calculated by adaptive Gauss–Kronrod quadrature numerical integration methods, which is verified via finite element methods. The coupling resonance mechanism of interface shear stratification is revealed by the forced vibration solution and the mass-spring model. The effects of excitation frequency, structural parameters, accretion, and matrix materials on the interfacial shear delamination are analyzed and discussed by practical cases of vibration de-accretion. For interface shear stratification of sandwich structures, the optimal excitation frequency as well as substrate thickness and accretion thickness is the value at coupling resonance, around which the interfacial shear stratification interval is formed by the interface fatigue failure criteria. In the stratification or/and antistratification design excited by vibrations, the excitation source and structure could be optimized by the method. Therefore, the results have important theoretical value for the extension and application of vibration stratification or/and antistratification technology.

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“…Cuong-Lea et al investigated the free vibration and buckling responses of annular plate, conical, and cylindrical shell by isogeometric analysis (IGA) method [10]. In the field of elastic wave characteristics, characteristics of the propagated wave in a sandwich shells are investigated by employing Hamilton's principle [11]. Behrouz et al studied elastic bulk wave characteristics of doubly curved nanoshell [12].…”

Section: Introductionmentioning

confidence: 99%

Simulation Investigation of the Stowing and Deployment Processes of a Self-Deployable Sunshield

Jiang³

et al. 2021

International Journal of Aerospace Engineering

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The stowing and deployment processes of a self-deployable sunshield are investigated numerically in this paper. The composition of the self-deployable sunshield is described. Deployed moment theoretical models for lenticular booms are formulated based on the bending theory of curved shell. The numerical analysis method of deployed moment is proposed. Two types of control methods for a fold crease are presented, and a dynamic analysis model considering geometry and nonlinear contact is built. The analysis results indicate that the press flattening method can be used effectively for controlling the fold crease, and the analytical results of the deployed moment are very close to the theoretical results. A stowing and deployment process analysis of the self-deployable sunshield is conducted. Thus, the deployment configurations and the time history curves of the dynamic behaviors are obtained. The results verify the feasibility of the analysis model, and this study can provide technical support for the engineering application of the self-deployable sunshield.

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A computational framework for propagated waves in a sandwich doubly curved nanocomposite panel

Cited by 96 publications

References 125 publications

Analysis of the Vibration of the Ground Surface by Using the Layered Soil: Viscoelastic Euler Beam Model due to the Moving Load

Analysis of the Vibration of the Ground Surface by Using the Layered Soil: Viscoelastic Euler Beam Model due to the Moving Load

Coupling resonance mechanism of interfacial stratification of sandwich plate structures excited by SH waves

Simulation Investigation of the Stowing and Deployment Processes of a Self-Deployable Sunshield

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