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Dynamic Coupling Analysis of Semisubmersible Platform Float-over Method for Docking Case

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Journal of Ocean University of China 2024年第2期23卷 345-357页

作者： DING Hongyan QIN licheng ZHANG Puyang song Zhengrong XIE Weiwei State Key Laboratory of Hydraulic Engineering Simulation and Safety Tianjin UniversityTianjin 300072China Offshore Oil Engineering Co. Ltd.Tianjin 300461China

In this paper,the multi-body coupled dynamic characteristics of a semisubmersible platform and an HYSY 229 barge were ***,coupled hydrodynamic analysis of the HYSY 229 barge and the semisubmersible platform was *** hydrodynamic parameters were obtained using the retardation function method of three-dimensional frequency-domain potential flow *** results of the hydrodynamic analysis were highly consistent with the test findings,verifying the accuracy of the multifloating hydrodynamic coupling analysis,and key hydrodynamic parameters were solved for different water depths and the coupling *** to the obtained results,the hydrodynamic influence was the largest in shallow waters when the coupling effect was ***,the coupled motion equation combined with viscous damping,fender system,and mooring system was established,and the hydrodynamics,floating body motion,and dynamic response of the fender system were *** analysis revealed good agreement among the surge,sway,and yaw motions of the two floating ***,when the wave period reached 10 s,the motion of the two floating bodies showed severe shock,and a relative motion was also ***,excessive constraints should be added between the two floating bodies during construction to ensure construction *** numerical analysis and model test results of the semisubmersible platform and HYSY 229 barge at a water depth of 42 m and sea conditions of 0°,45°,and 90° were in good agreement,and the error was less than 5%.The maximum movement of the HYSY 229 barge reached 2.61 m in the sway direction,whereas that of the semisubmersible platform was 2.11 *** construction,excessive constraints should be added between the two floating bodies to limit their relative movement and ensure construction safety.

关键词： float-over method semisubmersible platform coupling hydrodynamic fender system time-domain analysis

Nano-silica modified lightweight and high-toughness carbon fiber/phenolic ablator with excellent thermal insulation and ablation performance

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Defence Technology（防务技术） 2024年第1期31卷 192-199页

作者： Wenjie Xu Wenda song Xianfeng Jia Cheng Ma Jitong Wang Wenming Qiao licheng Ling State Key Laboratory of Chemical Engineering East China University of Science and TechnologyShanghai 200237China School of Chemical Engineering and Materials Changzhou Institute of TechnologyChangzhou 213032China Key Laboratory of Specially Functional Polymeric Materials and Related Technology(Ministry of Education) School of Materials Science and EngineeringEast China University of Science and TechnologyShanghai 200237China

Lightweight and high-toughness carbon fiber/phenolic ablator(CFPA)is required as the Thermal Protection System(TPS)material of aerospace vehicles for next-generation space *** improve the ablative properties,silica sol with good particle size distribution prepared using tetramethoxysilane(TMOS)was blended with natural rubber latex and deposited onto carbon fiber felt,which was then integrated with phenolic aerogel matrix,introducing nano-silica into the framework of *** modified CFPA with a low density of 0.28—0.31 g/cm3exhibits strain-in-fracture as high as 31.2%and thermal conductivity as low as 0.054 W/(m·K).Furthermore,a trace amount of nano-silica could effectively protect CFPA from erosion of oxidizing atmosphere in different high-temperature *** oxyacetylene ablation test of 3000°C for 20 s shows a mass ablation rate of 0.0225 g/s,a linear ablation rate of 0.209 mm/s for the modified CFPA,which are 9.64%and 24.82%lower than the unmodified ***,the long-time butane ablation test of 1200°C for 200 s shows an insignificant recession with mass and linear ablation rate of 0.079 g/s and 0.039 mm/s,16.84%and 13.33%lower than the unmodified ***,the fixed thermocouple in the test also demonstrates a good thermal insulation performance with a low peak back-face temperature of 207.7°C,12.25%lower than the unmodified ***,the nano-silica modified CFPA with excellent overall performance presents promising prospects in high-temperature aerospace applications.

关键词： Nano-silica Carbonfiber Phenolic aerogel Insulation Ablation

Characterization and evaluation of a femtosecond laser-induced osseointegration and an anti-inflammatory structure generated on a titanium alloy

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Regenerative Biomaterials 2021年第2期8卷 104-117页

作者： Yang Liu Zhongying Rui Wei Cheng licheng song Yunqiang Xu Ruixin Li Xizheng Zhang Department of Orthopedics Tianjin Medical University General HospitalTianjin 300052China Institute of Medical Service Support Institute of Systems EngineeringAcademy of Military SciencesTianjinChina Department of Nuclear Medicine Tianjin Medical University General HospitalTianjin 300052China Tianjin Key Laboratory of Oral and Maxillofacial Function Reconstruction Tianjin Stomatological HospitalThe Affiliated Stomatological Hospital of Nankai UniversityTianjin 300041China

Cell–material interactions during early osseointegration of the bone–implant interface are critical and involve crosstalk between osteoblasts and *** surface properties of titanium implants also play a critical role in cell–material *** this study,femtosecond laser treatment and sandblasting were used to alter the surface morphology,roughness and wettability of a titanium *** and osteoclasts were then cultured on the resulting titanium alloy *** disk groups were tested:a polished titanium alloy(pTi)control;a hydrophilic micro-dislocation titanium alloy(sandblasted Ti(STi));a hydrophobic nano-mastoid Ti alloy(femtosecond laser-treated Ti(FTi));and a hydrophilic hierarchical hybrid micro-/nanostructured Ti alloy[femtosecond laser-treated and sandblasted Ti(FSTi)].The titanium surface treated by the femtosecond laser and sandblasting showed higher biomineralization activity and lower cytotoxicity in simulated body fluid and lactate dehydrogenase *** to the control surface,the multifunctional titanium surface induced a better cellular response in terms of proliferation,differentiation,mineralization and collagen *** investigation of macrophage polarization revealed that increased anti-inflammatory factor secretion and decreased proinflammatory factor secretion occurred in the early response of *** on the above results,the synergistic effect of the surface properties produced an excellent cellular response at the bone–implant interface,which was mainly reflected by the promotion of early ossteointegration andmacrophage polarization.

关键词： femtosecond laser hybrid micro-/nanostructure cell–material interactions osseointegration macrophage polarization

Recent studies on chemistry of novel μ-CO-containing butterfly Fe/E (E=S,Se,Te) cluster salts

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Science China Chemistry 2009年第1期52卷 1-14页

作者： song licheng Department of Chemistry, State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin 300071, China Department of Chemistry State Key Laboratory of Elemento-Organic Chemistry Nankai University Tianjin China

This article describes recent developments in chemical study on a series of butterfly-shaped μ-CO-containing Fe/E (E = S, Se, Te) cluster salts. These salts include eleven novel cluster anions, which are the single butterfly one μ-CO-containing [(μ-RE)(μ-CO)Fe2(CO)6]- (A), the double butterfly two μ-CO-containing {[(μ-CO)Fe2(CO)6]2(μ-EZE-μ)}2- (B, E = S; C, E = Se), the triple butterfly three μ-CO- containing {[(μ-CO)Fe2(CO)6]3[(μ-SCH2CH2)3N]}3- (D), {[(μ-CO)Fe2(CO)6]3[1,3,5-(μ-SCH2)3C6H3]}3- (E), {[(μ- CO)Fe2(CO)6]3[(μ-SCH2)3CMe]}3- (F), the double butterfly one μ-CO-containing {[(μ-CO)Fe2(CO)6] [Fe2(CO)6][(μ-SCH2)3CMe]} - (G) derived in situ from F, the quadruple butterfly four μ-CO-containing {[(μ- CO)Fe2(CO)6]4[1,2,4,5-(μ-SCH2)4C6H2]}4- (H), the triple butterfly two μ-CO-containing {[(μ-CO)Fe2(CO)6]2 [Fe2(CO)6][1,2,4,5-(μ-SCH2)4C6H2]}2- (I) derived in situ from H, the quadruple butterfly four μ-CO-con- taining {[(μ-CO)Fe2(CO)6]4[(μ-SCH2)4C]}4- (J), and the triple butterfly two μ-CO-containing {[(μ-CO)Fe2 (CO)6]2[Fe2(CO)6][(μ-SCH2)4C]}2- (K) derived in situ from J. This article describes not only the synthetic methods for formation of such anionic cluster (A-K) salts, but also their novel reactions leading to various new types of butterfly Fe/E cluster complexes. All these findings described in this article are important both theoretically and practically.

关键词： butterfly cluster synthesis structure reaction mechanism

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呼吸危重症年度进展2021

中华结核和呼吸杂志 2022年第1期45卷 83-87页

作者：宋立成解立新解放军总医院呼吸与危重症医学部北京100710

呼吸危重症领域在2021年度(2020年10月1日到2021年9月30日)有了一些临床进展,重症肺炎发病早期、高炎性反应和病情较重的患者应用糖皮质激素有效;右美托咪定对年龄>65岁和外科术后有创机械通气患者能够获益;在呼吸支持领域,经鼻高流量... 详细信息

呼吸危重症领域在2021年度(2020年10月1日到2021年9月30日)有了一些临床进展,重症肺炎发病早期、高炎性反应和病情较重的患者应用糖皮质激素有效;右美托咪定对年龄>65岁和外科术后有创机械通气患者能够获益;在呼吸支持领域,经鼻高流量湿化氧疗用于慢性阻塞性肺疾病急性发作、经鼻高流量湿化氧疗联合清醒俯卧位通气、有创机械通气患者采用电阻抗交点法指导滴定呼气末正压、早期应用体外膜氧合、结合神经调节辅助通气指导尽快撤机等相关研究,说明在动态评估的基础上采取个体化呼吸支持的重要性,这些研究成果相信也会对呼吸危重症患者临床救治提供证据支持。

关键词：有创机械通气呼气末正压右美托咪定呼吸危重症呼吸支持体外膜氧合临床救治重症肺炎

STUDIES ON SUBSTITUTION OF C=O IN BIS(μ-ALKYLTHIO)-HEXACARBONYLDI-IRONS----THE SYNTHESIS AND STRUCTURES OF(μ-RS)(μ-R'S)Fe2(CO)5Ph3

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Chemical Research in Chinese Universities 1986年第2期 32-37页

作者： song licheng,Hu Qingmei and Wang Jitao (Department of Chemistry,Nankai University)

Fourteen new PPh3 substituted Fe-S clusters,with general formula (μ-RS)(μ-R’S)Fe2(CO)5 PPh3,have been synthesized by reaction of unsymmetrical type of bis(μ-alkylthio ) hexacarbonyldiirons with *** on the discussi... 详细信息

关键词：叫口 STUDIES ON SUBSTITUTION OF C=O IN BIS HEXACARBONYLDI-IRONS STUDIES ON SUBSTITUTION OF C R’S)Fe2 THE SYNTHESIS AND STRUCTURES OF ALKYLTHIO 口甲 Fe RS

Studies on Cobalt-Carbon Cluster——Svntnesis of α-Naphthyl α-Thienyl and Substituted-Phonyl Phenylacetyene Dicobalt Hexacarbonyls

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高等学校化学学报(英文版) 1987年第2期 44-49页

作者： song licheng,Wang Zhongxia Wang Jitao (Department of Chemistry,Nankai University,Tianjin)

12 new diarylacet ylenedicobal t hexacarbonyl complexes were synthesized by complexation reaction of a-naphthyl,a-thienyl or sub-stituted-phenyl phenylacetylene with Co2CO)8 and N-acetylation ofp-aminophenyl phenylacetylenedicobalt *** structures of all the complexes were characterized by elemental analysis,IR and H NMR *** a comparison between the N-acetylation of p-aminophenyl phenylacetylenedicobalt hexacarbonyl and that of aniline under comparable conditions,we found that the clustercore PhC2Co2(CO)6 para to an amino group attached to aromatic ring does not obviously affect the nucleophilicity of aniline.

关键词： aniline complexes aromatic comparable Naphthyl Svntnesis of benzene naphthyl attached substituted

CRYSTAL AND MOLECULAR STRUCTURE OF （μ-SPh）（μ-SCH2CH2CN）Fe2 （CO）6

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结构化学 1987年第3期 201-204页

作者： Wang Ruji song licheng Wang Hongen Hu Qingmei Nakai University, Tianjin

The crystal and molecular structure of (μ-SPh)(μ-SCH2CH2CN)Fe2-(CO)5 has been determined by X-ray diffraction method. The crystals of this complex are triclinic, space group P1,with a=ll.175(1), b=ll.877(2), c= 15.640(2)1,α=106.20(1),β=103.15(1),γ=98.46(1)°; Z=4; Dc=1.67g/cm3. The final structure refinement converged with unweighted and weighted R factors of 0.028 and 0.034 for 2853 observed unique reflections.

关键词： Fe SPh CRYSTAL AND MOLECULAR STRUCTURE OF SCH2CH2CN)Fe2 CN CO

SYNTHESIS AND SPECTRAL STUDIES OF(μ-PHENYLTHIO) (μ-ALKYLTHIO) HEXACARBONYLDIIRON COMPLEXES

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Chemical Journal of Chinese Universities 1985年第2期 55-62页

作者： song licheng,Hu Qingmei,Liu Xiangyang ana Wang Jicao (Department of Chemistry,Nankai University)

Through reductive reaction between PhL1 and μ-S2 Fe (CO/6,tollowed by nucleophilicsubstitution of the intermediate (μ-PhS} (μ-LIS} Fe2 (CO)6 toward RX,nine Fe-S clus-ter complexes of (μ-PhS)(μ-RS)Fe2(CO)6 series have been *** influence of RX structures on the activities in nucleophilic substitution has been examined and possible steroisomers and isomer ratios of the complexes *** addition,the regular variations of isomer’s CH3-S and CH2-S which are caused by the anisotropic effects of C-O and orientations of unshared electron pairs on sulfurs,have also been preliminarily discussed.

关键词： SYNTHESIS AND SPECTRAL STUDIES OF ALKYLTHIO HEXACARBONYLDIIRON COMPLEXES PHENYLTHIO OC Co