Open Access
EDITORIAL
Xiaodan Ren1,*, Tiancan Huang2
CMES-Computer Modeling in Engineering & Sciences, Vol.124, No.2, pp. 411-413, 2020, DOI:10.32604/cmes.2020.012603
（This article belongs to this Special Issue: Numerical Modeling and Simulation for Structural Safety and Disaster Mitigation)
Abstract This article has no abstract. More >
Open Access
ARTICLE
Yafei Zhang1,2, Ping Tan1,2,*, Haitao Ma1,2, Marco Donà1,2
CMES-Computer Modeling in Engineering & Sciences, Vol.124, No.2, pp. 415-431, 2020, DOI:10.32604/cmes.2020.09054
（This article belongs to this Special Issue: Numerical Modeling and Simulation for Structural Safety and Disaster Mitigation)
Abstract A staircase provides the main escape way from a building in an emergency. Unfortunately, it may suffer severe damages or even collapse during an
earthquake. For improving the seismic performance of staircases, this paper
proposes an innovative staircase isolator with the features of lightweight, costeffective and ease of construction and replacement, which is formed by suitable
engineering plastic shims between rubber layers. A connection construction
scheme is also proposed for the isolated staircase. Systematic performance tests
have been carried out to characterize the isolator in terms of mechanic behavior
and ultimate states. The test results show that mechanical properties of… More >
Open Access
ARTICLE
Dongyue Tang1, Ming Zhao1, *
CMES-Computer Modeling in Engineering & Sciences, Vol.124, No.2, pp. 433-457, 2020, DOI:10.32604/cmes.2020.09268
（This article belongs to this Special Issue: Numerical Modeling and Simulation for Structural Safety and Disaster Mitigation)
Abstract The monopile foundation is the main form of offshore wind turbine foundation,
and its surrounding scouring pit will reduce the constraints of the soil on the piles, which
makes wind turbine foundation instability a key issue affecting the structural safety of
offshore wind turbines. In previous studies, the rotating rotor and control system are
neglected when studying the influence of scour on the offshore wind turbine structure.
In this paper, the numerical model of the blade-tower-monopile integrated offshore wind
turbine is established, and the influence of scour on the dynamic characteristics of wind
turbine is obtained considering parameters, such as… More >
Open Access
ARTICLE
N. Ganesh1, R. K. Ghadai2, A. K. Bhoi3, K. Kalita4,*, Xiao-Zhi Gao5
CMES-Computer Modeling in Engineering & Sciences, Vol.124, No.2, pp. 459-476, 2020, DOI:10.32604/cmes.2020.09645
Abstract Electrical Discharge Machining (EDM) is a popular non-traditional
machining process that is widely used due to its ability to machine hard and brittle
materials. It does not require a cutting tool and can machine complex geometries
easily. However, it suffers from drawbacks like a poor rate of machining and
excessive tool wear. In this research, an attempt is made to address these issues
by using an intelligent predictive model coupled global optimization approach
to predict suitable combinations of input parameters (current, pulse on-time and
pulse off-time) that would effectively increase the material removal rate and minimize the tool wear. The… More >
Open Access
ARTICLE
Muhammad Shoaib Arif1,*, Ali Raza1,2, Kamaleldin Abodayeh3, Muhammad Rafiq4, Mairaj Bibi5, Amna Nazeer5
CMES-Computer Modeling in Engineering & Sciences, Vol.124, No.2, pp. 477-491, 2020, DOI:10.32604/cmes.2020.011121
Abstract The essential features of the nonlinear stochastic models are positivity,
dynamical consistency and boundedness. These features have a significant role in
different fields of computational biology and many more. The aim of our paper, to
achieve the comparison analysis of the stochastic susceptible, infected recovered
epidemic model. The stochastic modelling is a realistic way to study the dynamics
of compartmental modelling as compared to deterministic modelling. The effect
of reproduction number has also observed in the stochastic susceptible, infected
recovered epidemic model. For comparison analysis, we developed some explicit
stochastic techniques, but they are the time-dependent techniques. The implicitly
driven… More >
Open Access
ARTICLE
Rafael Company1, Vera N. Egorova2, Lucas Jódar1,*, Ferran Fuster Valls3
CMES-Computer Modeling in Engineering & Sciences, Vol.124, No.2, pp. 493-508, 2020, DOI:10.32604/cmes.2020.010208
Abstract A numerical method for American options pricing on assets under the
Heston stochastic volatility model is developed. A preliminary transformation is
applied to remove the mixed derivative term avoiding known numerical drawbacks and reducing computational costs. Free boundary is treated by the penalty
method. Transformed nonlinear partial differential equation is solved numerically
by using the method of lines. For full discretization the exponential time differencing method is used. Numerical analysis establishes the stability and positivity of
the proposed method. The numerical convergence behaviour and effectiveness are
investigated in extensive numerical experiments. More >
Open Access
ARTICLE
Lijian Xu1, Tianyang Yang2, Lekang Yin3, Ye Kong2, Yuri Vassilevski4,5, Fuyou Liang1,5,6,*
CMES-Computer Modeling in Engineering & Sciences, Vol.124, No.2, pp. 509-526, 2020, DOI:10.32604/cmes.2020.010719
Abstract Computational modeling methods have been increasingly employed to
quantify aortic hemodynamic parameters that are challenging to in vivo measurements but important for the diagnosis/treatment of aortic disease. Although the
presence of turbulence-like behaviors of blood flow in normal or diseased aorta
has long been confirmed, the majority of existing computational model studies
adopted the laminar flow assumption (LFA) in the treatment of sub-grid flow variables. So far, it remains unclear whether LFA would significantly compromise the
reliability of hemodynamic simulation. In the present study, we addressed the
issue in the context of a specific aortopathy, namely aortic dilation, which is… More >
Open Access
ARTICLE
Zhenghao Yang, Erkan Oterkus*, Selda Oterkus
CMES-Computer Modeling in Engineering & Sciences, Vol.124, No.2, pp. 527-544, 2020, DOI:10.32604/cmes.2020.010804
Abstract In this study, a new state-based peridynamic formulation is developed
for functionally graded Euler-Bernoulli beams. The equation of motion is
developed by using Lagrange’s equation and Taylor series. Both axial and transverse displacements are taken into account as degrees of freedom. Four different
boundary conditions are considered including pinned support-roller support,
pinned support-pinned support, clamped-clamped and clamped-free. Peridynamic results are compared against finite element analysis results for transverse
and axial deformations and a very good agreement is observed for all different
types of boundary conditions. More >
Open Access
ARTICLE
Tao Zhang, Jinglan Deng*, Jihui Wang
CMES-Computer Modeling in Engineering & Sciences, Vol.124, No.2, pp. 545-559, 2020, DOI:10.32604/cmes.2020.09536
Abstract The out-of-plane fold is a common defect of composite materials during
the manufacturing process and will greatly affect the compressive strength as well
as the service life. Making it of great importance to investigate the influence of
out-of-plane defects to the compressive strength of laminate plates of composite
materials, and to understand the patterns of defect evolution. Therefore, the strip
method is applied in this article to create out-of-plane defects with different aspect
ratios in laminated plates of composite materials, and a compressive performance
test is conducted to quantify the influence of out-of-plane defects. The result
shows that the compressive… More >
Open Access
ARTICLE
Chengwen Liu1,*, Lin Zhu1, Xingru Wu2,*, Jian Liang1, Zhaomin Li1
CMES-Computer Modeling in Engineering & Sciences, Vol.124, No.2, pp. 561-572, 2020, DOI:10.32604/cmes.2020.010699
Abstract In drilling a deepwater well, the mud density window is narrow, which
needs a precise pressure control to drill the well to its designed depth. Therefore,
an accurate characterization of annular flow between the drilling riser and drilling
string is critical in well control and drilling safety. Many other factors influencing
the change of drilling pressure that should be but have not been studied suffi-
ciently. We used numerical method to simulate the process of drill string rotation
and vibration in the riser to show that the rotation and transverse vibration of drill
string can increase the axial velocity in… More >
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