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Numerical Model

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Richard F Salant - One of the best experts on this subject based on the ideXlab platform.

  • Numerical Model of a tandem reciprocating hydraulic rod seal
    Journal of Tribology-transactions of The Asme, 2008
    Co-Authors: Bo Yang, Richard F Salant
    Abstract:

    A Numerical Model of a tandem reciprocating hydraulic rod seal, consisting of two elastomeric U cup seals, has been constructed. It is applicable to cases in which the stroke length is significantly larger than the seal width. The Model consists of coupled steady state fluid mechanics, deformation mechanics, and contact mechanics analyses, with an iterative computational procedure. The behaviors of the two seals are coupled through the pressure/density in the interseal region and through flow continuity. Results for a typical tandem seal are compared to those of a single seal and a double lip seal.

  • Numerical Model of a tandem reciprocating hydraulic rod seal
    ASME STLE 2007 International Joint Tribology Conference Parts A and B, 2007
    Co-Authors: Bo Yang, Richard F Salant
    Abstract:

    A Numerical Model of a tandem reciprocating hydraulic rod seal, consisting of two elastomeric U cup seals, has been constructed. The Model consists of coupled steady state fluid mechanics, deformation mechanics and contact mechanics analyses, with an iterative computational procedure. The behaviors of the two seals are coupled through the pressure/density in the inter-seal region and through flow continuity. Results for a typical tandem seal are compared with those of a single seal and a double lip seal.Copyright © 2007 by ASME

Bo Yang - One of the best experts on this subject based on the ideXlab platform.

  • Numerical Model of a tandem reciprocating hydraulic rod seal
    Journal of Tribology-transactions of The Asme, 2008
    Co-Authors: Bo Yang, Richard F Salant
    Abstract:

    A Numerical Model of a tandem reciprocating hydraulic rod seal, consisting of two elastomeric U cup seals, has been constructed. It is applicable to cases in which the stroke length is significantly larger than the seal width. The Model consists of coupled steady state fluid mechanics, deformation mechanics, and contact mechanics analyses, with an iterative computational procedure. The behaviors of the two seals are coupled through the pressure/density in the interseal region and through flow continuity. Results for a typical tandem seal are compared to those of a single seal and a double lip seal.

  • Numerical Model of a tandem reciprocating hydraulic rod seal
    ASME STLE 2007 International Joint Tribology Conference Parts A and B, 2007
    Co-Authors: Bo Yang, Richard F Salant
    Abstract:

    A Numerical Model of a tandem reciprocating hydraulic rod seal, consisting of two elastomeric U cup seals, has been constructed. The Model consists of coupled steady state fluid mechanics, deformation mechanics and contact mechanics analyses, with an iterative computational procedure. The behaviors of the two seals are coupled through the pressure/density in the inter-seal region and through flow continuity. Results for a typical tandem seal are compared with those of a single seal and a double lip seal.Copyright © 2007 by ASME

G. Saratsis - One of the best experts on this subject based on the ideXlab platform.

  • A Combined Three-Dimensional Geological-Geostatistical-Numerical Model of Underground Excavations in Rock
    Rock Mechanics and Rock Engineering, 2007
    Co-Authors: M. Stavropoulou, G. Exadaktylos, G. Saratsis
    Abstract:

    This paper exploits geological and borehole geotechnical data obtained in the exploratory phase of a tunneling project to investigate in a first place if the kriging interpolation scheme may effectively reproduce the spatial variability of rock mass quality (Rock Mass Rating, RMR) in the vicinity of tunnels. For this purpose a quick solver in Fortran has been developed that performs variography analysis of 3D spatial data, fast kriging estimations of RMR between borehole sampling locations at the centroids of the elements of the Numerical Model, and Model validation. For the purpose of an integrated underground excavation design, a step further is made by incorporating into the 3D mechanical Numerical Model of the rock mass, the three-dimensional (3D) solid geological Model, thus coupling the geology with the ground (geotechnical) Model (i.e. each element of the Numerical Model is assigned a geological material). The mechanical properties of each finite difference cell (or Representative Elementary Volume) of the ground Model were then prescribed according to its geological type, the spatial heterogeneity of the rock mass expressed quantitatively with the kriging Model, and the upscaling calculations of the mechanical properties of the intact rocks determined in the laboratory, based on the size-effect (strength dependence on size) and Damage Theory. Furthermore, a preliminary Numerical simulation of the advance of unsupported tunnels in the Model of the heterogeneous rock mass was performed for illustration purposes.

Hua Zhao - One of the best experts on this subject based on the ideXlab platform.

M. Stavropoulou - One of the best experts on this subject based on the ideXlab platform.

  • A Combined Three-Dimensional Geological-Geostatistical-Numerical Model of Underground Excavations in Rock
    Rock Mechanics and Rock Engineering, 2007
    Co-Authors: M. Stavropoulou, G. Exadaktylos, G. Saratsis
    Abstract:

    This paper exploits geological and borehole geotechnical data obtained in the exploratory phase of a tunneling project to investigate in a first place if the kriging interpolation scheme may effectively reproduce the spatial variability of rock mass quality (Rock Mass Rating, RMR) in the vicinity of tunnels. For this purpose a quick solver in Fortran has been developed that performs variography analysis of 3D spatial data, fast kriging estimations of RMR between borehole sampling locations at the centroids of the elements of the Numerical Model, and Model validation. For the purpose of an integrated underground excavation design, a step further is made by incorporating into the 3D mechanical Numerical Model of the rock mass, the three-dimensional (3D) solid geological Model, thus coupling the geology with the ground (geotechnical) Model (i.e. each element of the Numerical Model is assigned a geological material). The mechanical properties of each finite difference cell (or Representative Elementary Volume) of the ground Model were then prescribed according to its geological type, the spatial heterogeneity of the rock mass expressed quantitatively with the kriging Model, and the upscaling calculations of the mechanical properties of the intact rocks determined in the laboratory, based on the size-effect (strength dependence on size) and Damage Theory. Furthermore, a preliminary Numerical simulation of the advance of unsupported tunnels in the Model of the heterogeneous rock mass was performed for illustration purposes.