Elastic-slip interface effect on dynamic response of underwater convey tunnel in saturated poroelastic soil subjected to plane waves

Li, Bailin; Fang, Xue-Qian; Zhang, Tengfei; Yang, Shaopu

doi:10.1016/j.tust.2020.103468

Cited by 21 publications

(10 citation statements)

References 14 publications

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“…For instance, the time-harmonic interactions between semicoherent heterophase interfaces with core-spreading dislocation structures [63] with extrinsic dislocation loops [64] and interfacial cracks [65,66] in multifunctional composites would be of great importance to understand their effects on the natural frequencies and lower and higher thermoelastic mode shapes for future renewable energy devices in aerospace structures [67]. Due to the present versatile formalism to take care of imperfect interfaces, other interfacial considerations as the elastic-slip interface model [68,69] and surface/interface model [70] raised by Gurtin and Murdoch [71] can be introduced for appropriate applications, as well as nonlocal size effects [13] in nano-and micro-scale structures. ii , and (f) von Mises stress # vm .…”

Section: Discussionmentioning

confidence: 99%

Free vibration of fully coupled thermoelastic multilayered composites with imperfect interfaces

Vattré

Pan

Chiaruttini

2021

Composite Structures

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A fully coupled thermoelastic framework is formulated to cope with the free vibration response of anisotropic multilayered plates in three dimensions. The laminated structure consists of homogeneous laminae of arbitrary thickness and width under simply supported edge conditions in thermal environment. The general and exact field expressions of the temperature, heat flux, displacement and stress components are expressed in terms of double Fourier series expansions in any rectangular plate, which lead to the extended Stroh formalism with thermomechanical coupling effects in a concise and compact matrix form. Different imperfect interface conditions are introduced to characterize specific structural and thermal contact properties at the bounding interfaces, and further to determine the finite complex valued coefficients in the suitable series relations. The complete time-harmonic solutions in the laminated composites in the presence of perfect/imperfect interfaces are recursively obtained by means of the modified dual variable and position technique with explicit layer-to-layer transfer matrices. Results are obtained for different layups, length-to-thickness ratios and interfacial boundary conditions for two application examples, namely the graphite/epoxy cross-ply composites and the thermal barrier coatings on superalloys, without suffering from numerical exponential instability. These investigations reveal that the natural frequencies and first and higher vibration mode shapes of the multilayered structures can be considerably affected by increasing the environmental temperature and the severity of the interfacial imperfections. Since the through-thickness stress distribution in 2, 5, and 10 layered composites appears to be strongly correlated to the layups, such modal stress analysis could be exploited to locate the fatigue hotspots operated in dynamic structures and to guide the structural design of aircraft and spacecraft composite laminates subjected to residual vibrations.

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Section: Discussionmentioning

confidence: 99%

Free vibration of fully coupled thermoelastic multilayered composites with imperfect interfaces

Vattré

Pan

Chiaruttini

2021

Composite Structures

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“…Substitute equation ( 19) into (10) and then into equation (21). Finally, the analytical solution for the thrust T sv and the moment M sv of the circular tunnel under far-field shear stress in the local coordinate system (η, ξ) is obtained:…”

Section: Internal Force Of Tunnel Under Reflected Sv Wavesmentioning

confidence: 99%

“…Fang et al [9] introduced the elastic-slip interface model to simulate the ground-tunnel interface properties and analyzed the dynamic response of twin tunnels subjected to blast waves. en, Li et al [10] used the same elastic-slip interface model and analyzed the influence of the elastic-slip interface in saturated poroelastic soil on the dynamic response of the underwater tunnel subjected to plane waves. Another important assumption adopted by most analytical solution is dry soil conditions.…”

Section: Introductionmentioning

confidence: 99%

Analytical Solution for Circular Tunnel under Obliquely Incident P Waves considering Different Contact Conditions

Duan

Zhao

Huang

et al. 2021

Shock and Vibration

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An analytical solution for the seismic-induced thrust and moment of the circular tunnel in half-space under obliquely incident P waves is developed in this study, which is the superposition of the solution for deep tunnels under incident and reflected P waves and the reflected SV waves. To consider tangential contact stiffness at the ground-tunnel interface, a spring-type stiffness coefficient is introduced into the force-displacement relationship. Moreover, the tunnel lining is treated as the thick-wall cylinder, providing more precise forecasts than beam or shell models used in previous analytical solution, especially for tunnels with thick lining. The reliability of the proposed analytical solution is assessed by comparing with the dynamic numerical results. Based on the proposed analytical solution, parametrical studies are conducted to investigate the effect of some critical factors on the tunnel’s seismic response, including the incident angles, the tangential contact stiffness at the ground-tunnel interface, and the relative stiffness between the ground and the tunnel. The results demonstrate that the proposed analytical solution performs well and can be adopted to predict the internal forces of circular tunnels under obliquely incident P waves in seismic design.

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“…At present, the parameter design and data management are usually compiled manually, which leads to a series of problems in actual engineering, such as nonstandard blasting design, complex, and fragmentary blasting parameters. Therefore, how to change the backward situation of manual design calculation, drawing, and manual compilation and management of blasting data has become an urgent problem in the field of blasting and tunnel engineering [4][5][6]. With the continuous development of information technology and computer hardware, the concept of digital mines continues to deepen and improve.…”

Section: Research Status Of the Intelligent Blasting Design Systemmentioning

confidence: 99%

Design and Realization of the Intelligent Design System for Tunnel Blasting in Mine Based on Database

Luo

Guan

2020

Geofluids

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With the improvement of informatization and standardization of mine development, it is an inevitable trend to apply computer technology to the intelligent design of tunnel blasting excavation. Seeking to the problems existing in the intelligent design system of blasting excavation, a new intelligent design system of blasting excavation is constructed from the perspective of database technology. The new intelligent design system adopts the design of central database system and subuser rights to meet the data synchronization and sharing among different users. At the same time, the new system also extracts blasting design parameters and actual engineering data and designs a more reasonable and comprehensive database structure, database logic, and data word table. Based on the T-S fuzzy neural network model, the intelligent search rules of excavation blasting data are also constructed in the new system. Finally, based on Oracle and VB.NET as the new system development platform, MFC, and ADO as the new system development technology, the new intelligent design system for tunnel blasting and excavation was completed. The implementation of the new system addresses the needs of blasting data information storage and search and lays a foundation for the informatization and standardization of tunnel excavation blasting.

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Elastic-slip interface effect on dynamic response of underwater convey tunnel in saturated poroelastic soil subjected to plane waves

Cited by 21 publications

References 14 publications

Free vibration of fully coupled thermoelastic multilayered composites with imperfect interfaces

Free vibration of fully coupled thermoelastic multilayered composites with imperfect interfaces

Analytical Solution for Circular Tunnel under Obliquely Incident P Waves considering Different Contact Conditions

Design and Realization of the Intelligent Design System for Tunnel Blasting in Mine Based on Database

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