Home / Journals / CMES / Vol.106, No.1, 2015
Table of Content
  • Open Access

    ARTICLE

    Modified SFDI for Fully NonlinearWave Simulation

    Guochun Xu1, S Yan2, Q.W. Ma1,2,3
    CMES-Computer Modeling in Engineering & Sciences, Vol.106, No.1, pp. 1-35, 2015, DOI:10.3970/cmes.2015.106.001
    Abstract In the Meshless Local Petrove-Galerkin based on Rankine source solution (MLPG-R), a simplified finite difference interpolation (SFDI) scheme was developed for numerical interpolation and gradient calculation (CMES, Vol. 23(2), pp. 75-89). Numerical tests concluded that the SFDI is generally as accurate as the linear moving least square method (MLS) but requires less CPU time. In this paper, a modified SFDI is proposed for numerically modelling of nonlinear water waves, considering the typical feature of the spatial variation of the wave-related parameters. Systematic numerical investigations are carried out and the results indicate that the modification considerably improves the robustness of the… More >

  • Open Access

    ARTICLE

    Analysis of Symmetry Breaking Bifurcation in Duffing System with Random Parameter

    Ying Zhang1, Lin Du1, Xiaole Yue1, Qun Han1, Tong Fang2
    CMES-Computer Modeling in Engineering & Sciences, Vol.106, No.1, pp. 37-51, 2015, DOI:10.3970/cmes.2015.106.037
    Abstract The symmetry breaking bifurcation (SBB) phenomenon in a deterministic parameter Duffing system (DP-DS) is well known, yet the problem how would SBB phenomenon happen in a Duffing system with random parameter (RP-DS) is still open. For comparison study, the results for DP-DS are summarized at first: in short, SBB in DP-DS is just a transition of response phase trajectories from a single self-symmetric one about the origin into two mutual symmetric once, or vice versa. However, in DP-DS case, the two mutual symmetric phase trajectories are never commutable. In view of every sample of RP-DS is a DP-DS, we think… More >

  • Open Access

    ARTICLE

    Optimization of Forming Process of a U-rib by Gas Heating Based on Theoretical Prediction

    Juan Blandon1, Shinji Takaba2, Toru Omae2, Naoki Osawa1, Hidekazu Murakawa3
    CMES-Computer Modeling in Engineering & Sciences, Vol.106, No.1, pp. 53-75, 2015, DOI:10.3970/cmes.2015.106.053
    Abstract Bending deformation of U-rib by gas heating is investigated using Thermal Elastic Plastic FEA employing an accurate heat source model. To validate our computational model, comparison between numerical analysis and experimental measurements are carried out. Good agreement is obtained for both temperature and deformation measurements. Inherent deformation method is employed to evaluate the overall behavior of U-rib under the influence of heating location and heating speed. Based on the prediction by FEA and using the inherent deformation method a new mathematical model describing the deformation of the U-rib is developed and evaluated for different combinations of heating conditions which can… More >

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