Qiang Tong¹, Qingwen Ren^{1, *}, Lei Shen ², Linfei Zhang ², Yin Yang³

CMES-Computer Modeling in Engineering & Sciences, Vol.114, No.1, pp. 33-58, 2018, DOI:10.3970/cmes.2018.114.033

Abstract In this article, the post-peak softening stage of the constitutive relation and the elastic stiffness degradation of concrete are investigated, and a highly reasonable constitutive relation curve is proposed. At the material level, the energy change in the concrete failure process is studied based on the different stress-strain curves of concrete under uniaxial tension and compression. The concrete failure criterion based on elastic strain energy density is deemed suitable and consistent with the experimental phenomena. The hysteresis phenomenon (lags behind the peak strength) is also discussed. At the structure level, the strength reduction method is employed for the stability analysis,… More >

Binbin Pan, Weicheng Cui

The International Conference on Computational & Experimental Engineering and Sciences, Vol.17, No.3, pp. 81-82, 2011, DOI:10.3970/icces.2011.017.081

Abstract The most critical component of a deep manned submersible is the manned pressure hull. It provides not only a safe living space for pilots and scientists but also provides a proper working condition for non-pressure-resisting and non-water-repellent equipments. At the same time, the weight of the pressure hull occupies a large part of the total weight of the deep manned submersible. So the pressure hull should be designed to have enough strength, water-tightness and as light as possible. As the most commonly used pressure hull type, spherical pressure hull has been used in all the existing deep manned submersibles such… More >

Kunigal Shivakumar

The International Conference on Computational & Experimental Engineering and Sciences, Vol.20, No.1, pp. 19-20, 2011, DOI:10.3970/icces.2011.020.019

Abstract The vision of the Center for Aviation Safety (CAS) is to establish a strong aerospace engineering research and education program by bringing together highly competent and dedicated faculty members at North Carolina A&T State University (A&T) through the NASA funding to address the challenges in composite aircraft structures, fire safety, hazards of airflow, and the alternate fuels. The research goals of CAS will be accomplished through an understanding of science and engineering to developing new materials, tools, models, and technologies that support the safe operation of aerospace vehicles. Research goal is being accomplished through three tasks: Advancing Composites and Structures;… More >

ZHANG Rong-gang^{1, 2,*}, ZHANG Hong-tao³, BAI Yu-xing³, GAO Jian-ling³, ZHANG Lai-yong², XU Bing-ye¹

The International Conference on Computational & Experimental Engineering and Sciences, Vol.18, No.1, pp. 17-18, 2011, DOI:10.3970/icces.2011.018.017

Abstract Based on the upper bound theorem, the fire resistance is studied using the combination of element collapse mechanisms of steel frames, where the element collapse mechanisms are automatically determined from independent mechanisms. The fire limit load is calculated by solving a nonlinear mathematical programming. The computing procedure is programmed by FORTRAN language. Results show that this method is useful to find the collapse mechanism with the lowest fire limit load, which can provide a theoretical and practical way for the fire design of steel frame structure. More >

Yao Tang^*, Dongyang Feng, Yudan Gou, Yongchang Cai

The International Conference on Computational & Experimental Engineering and Sciences, Vol.21, No.2, pp. 32-32, 2019, DOI:10.32604/icces.2019.05015

Abstract It is a serious challenge to estimate the safety and ultimate bearing capacity of a corroded large-span drainage culvert. In this paper, a simplified computational model based on matrix displacement method is established. Within the framework of concrete structure principles and structural mechanics, both the ultimate strength and flexural stiffness reduction of key sections are considered in this model. This simplified model can greatly reduce the computational cost and is readily applicable to engineering practice. Its validity and availability have been verified by finite element analysis with a damage-plasticity coupled concrete constitutive model and physical experiments. Then it was applied… More >

Hai Zhou^1,2,*, Yaojie Chen^1,2, Sumin Zhang³

Journal on Artificial Intelligence, Vol.1, No.1, pp. 29-36, 2019, DOI:10.32604/jai.2019.05939

Abstract In recent years, with the prosperity of world trade, the water transport industry has developed rapidly, the number of ships has surged, and ship safety accidents in busy waters and complex waterways have become more frequent. Predicting the movement of the ship and analyzing the trajectory of the ship are of great significance for improving the safety level of the ship. Aiming at the multi-dimensional characteristics of ship navigation behavior and the accuracy and real-time requirements of ship traffic service system for ship trajectory prediction, a ship navigation trajectory prediction method combining ship automatic identification system information and Back Propagation… More >

Yong Chen^1,*, Lei Cui¹, Chong Wang²

Journal of Quantum Computing, Vol.1, No.1, pp. 41-48, 2019, DOI:10.32604/jqc.2019.06283

Abstract In order to solve the problem of data island in the safety management of offshore oil and gas fields, take full advantage of data for subsequent analysis and development, and support production safety management of oil and gas fields, the MES, which is maturely applied in manufacturing and downstream production of CNOOC (China National Offshore Oil Corporation), is introduced by the petroleum administration at the eastern South China sea. The system adopts the real-time database and relational database to collect the scattered structured data, such as evidence information of offshore oil and gas production facilities personnel, on-site hidden danger information… More >

Di Wu¹, Wei Gao^1,2, Chongmin Song¹, Zhen Luo³

CMES-Computer Modeling in Engineering & Sciences, Vol.108, No.5, pp. 331-373, 2015, DOI:10.3970/cmes.2015.108.331

Abstract Two novel mathematical programming approaches are proposed to separately assess non-deterministic behaviour and stability of engineering structures against disparate uncertainties. Within the proposed computational schemes, uncertainties attributed by the material properties, loading regimes, as well as environmental influences are simultaneously incorporated and modelled by the interval approach. The proposed mathematical programming approaches proficiently transform the uncertain structural analyses into deterministic mathematical programs. Two essential aspects of structural analysis, namely linear structural behaviour and bifurcation buckling, have been explicitly investigated. Diverse verifications have been implemented to justify the accuracy and computational efficiency of the proposed approaches through practically motivated numerical examples. More >

Zhengzheng Cao¹, Yuejin Zhou^1,2, Ping Xu¹, Jiawei Li¹

CMES-Computer Modeling in Engineering & Sciences, Vol.101, No.5, pp. 351-364, 2014, DOI:10.3970/cmes.2014.101.351

Abstract In accordance with the influence of underground mining on the deformation and failure of a shallow-buried gas pipeline, the pipe-soil interaction during mining is classified into two stages, namely coordinated deformation stage and partial hanging stage. According to the mechanical characteristics of the buried pipeline in each stage, the models of a) a beam on an elastic foundation, b) an elastic beam under uniform load, and c) a vertical and horizontal bending beam are introduced in a mining subsidence zone to mechanically analyze, respectively a) the pipeline in non-mining subsidence zone, b) the pipeline at the coordinated deformation stage, and… More >

Lior Banai

CMES-Computer Modeling in Engineering & Sciences, Vol.88, No.5, pp. 351-366, 2012, DOI:10.3970/cmes.2012.088.351

Abstract The explosive Engineering field is a costly one in which not every organization can effort the time and money it takes to performed field tests on its explosives. The purpose of this article is to present a program that was developed in the Israeli Navy for performance estimations and safety issues of warheads and explosives. With a relative small developing time one can create a tool that gives preliminary results in a few minutes without the need to design and order a field tests or run finite elements analyses. By implementing a few known models, in this tool, the user… More >