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RISS 인기검색어
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- 저자 : Qinglong Luo (검색결과 2 건)
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Calculation method of residual fatigue life of in-service unbonded flexible pipe
Qinglong Lei,Xiaohua Zhu,Heng Luo 대한기계학회 2023 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.37 No.5
As a catenary riser, unbonded flexible pipe (UFP) has the advantages of convenient installation, recyclability, flexibility, anti-corrosion and large design space. To analyze the residual fatigue life of in-service unbonded flexible riser (UFR), a global model of riser is established in this paper. By analyzing the distribution of configuration, tension, bending moment and bending curvature along the riser under static and dynamic loads, the most dangerous position and dynamic response are determined. And then, the residual fatigue life of the UFR is calculated. The calculation results show that the fatigue life of the UFR is greatly affected by the pipe annulus condition, and the dry annulus condition is 4.6 times that of the wet annulus condition. It is concluded that when evaluating the remaining fatigue life of an inservice UFR, the S-N curve of the tensile amour layers must be calculated according to different annular conditions, so that the fatigue life can be accurately obtained. Summarily, this paper provides an effective method for calculating the residual fatigue life of in-service UFRs.
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Adsorption and electro-assisted method removal of boron in aqueous solution by nickel hydroxide
Tao Song,Qinglong Luo,Fengfeng Gao,Bing Zhao,Xiaogang Hao,Zhong Liu 한국공업화학회 2023 Journal of Industrial and Engineering Chemistry Vol.118 No.-
Technical research on electrochemical acid-free desorption of boron is imminent, and layered nickelhydroxide is a potential boron-responsive active electrode material. In this paper, nickel hydroxidewas used to remove boron from aqueous resources by electro-assisted and conventional adsorptionmethods. The option of conditions by nickel hydroxide adsorption for boron is mild (pH: 7 9) withan exothermic process. Interestingly, the synergistic effect of physical and chemical adsorption improvesthe adsorption rate and adsorption capacity of nickel hydroxide for boron under the action of the electricfield, and the adsorption performance is better at low voltage (0.2 0.4 V). The equilibrium time of theelectro-assisted method is 4 times shorter than conventional adsorption methods, and the maximumadsorption capacity can reach 57.5 mg/g than conventional adsorption (45.4 mg/g). In addition, the nickelhydroxide has selectivity in high-concentration anion solutions and can be easily regenerated by an alkalinesolution. Therefore, it is expected that nickel hydroxide with the electro-assisted method could be apotential approach for the high-efficiency and eco-friendly removal of boron.
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