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| 1 | A robust and efficient structural reliability method combining radial-based importance sampling and Kriging显示文摘Simulation based structural reliability analysis suffers from a heavy computational burden, as each sample needs to be evaluated on the performance function, where structural analysis is performed. To alleviate the computational burden, related research focuses mainly on reduction of samples and application of surrogate model, which substitutes the performance function. However,the reduction of samples is achieved commonly at the expense of loss of robustness, and the construction of surrogate model is computationally expensive. In view of this, this paper presents a robust and efficient method in the same direction. The present method uses radial-based importance sampling (RBIS) to reduce samples without loss of robustness. Importantly, Kriging is fully used to efficiently implement RBIS. It not only serves as a surrogate to classify samples as we all know, but also guides the procedure to determine the optimal radius, with which RBIS would reduce samples to the highest degree. When used as a surrogate, Kriging is established through active learning, where the previously evaluated points to determine the optimal radius are reused. The robustness and efficiency of the present method are validated by five representative examples, where the present method is compared mainly with two fundamental reliability methods based on active learning Kriging. | XIONG Bo TAN HuiFeng | 2018 | Science China(Technological Sciences)2018，61，5： | 5 |
| 2 | Membrane buckling patterns and secondary buckling analysis 显示文摘 | Li Yunliang Tan Huifeng Wang Changguo Lu Mingyu | 2008 | International Joumal of Space Structures2008，23，3： | 1 |
| 3 | A Survey-on Sentiment Detection of Reviews显示文摘 | Tang Huifeng Tan Songbo Chen Xueqi | 2009 | Expert Systems With Applications2009，36，10： | 1 |
| 4 | Membrane buckling patterns and secondary buckling analysis 显示文摘 | LI Yunliang TAN Huifeng WANG Changguo | 2008 | International Journal of Space Structures2008，23，3： | 1 |
| 5 | Organic- montomorillonite modified shape memory epoxy composite显示文摘 | Liu Yuyan Han Chunmiao Tan Huifeng | 2010 | Polym Adv Techn2010，22，12： | 1 |
| 6 | Pseudo-beam method for compressive buckling characteristics analysis of space inflatable load-carrying structures显示文摘This paper extends Le van's work to the case ofnonlinear problem and the complicated configuration. Thewrinkling stress distribution and the pressure effects are alsoincluded in our analysis. Pseudo-beam method is presentedbased on the inflatable beam theory to model the inflatablestructures as a set of inflatable beam elements with a pre-stressedstate. In this method, the discretized nonlinearequations are given based upon the virtual work principlewith a 3-node Timoshenko's beam model. Finite elementsimulation is performed by using a 3-node BEAM 189 elementincorporating ANS YS nonlinear program. The pressureeffect is equivalent included in our method by modifyingbeam element cross-section parameters related to pressure.A benchmark example, the bending case of an inflatable cantileverbeam, is performed to verify the accuracy of our proposedmethod. The comparisons reveal that the numericalresults obtained with our method are close to open publishedanalytical and membrane finite element results. The methodis then used to evaluate the whole buckling and the load-carryingcharacteristics of an inflatable support frame subjectedto a compression force. The wrinkling stress and regioncharacteristics are also shown in the end. This method givesbetter convergence characteristics, and requires much lesscomputation time. It is very effective to deal with the whole load-carrying ability analytical problems for large scaleinflatable structures with complex configuration. | Changguo Wang Huifeng Tan Xingwen Du Center for Composite Materials,Harbin Institute of Technology, 150001 Harbin, China | 2009 | Acta Mechanica Sinica2009，25，5： | 1 |
| 7 | Analysis of post-bucklingdynamic behavior of membrane 显示文摘 | Tan Huifeng Li Yunliang | 2011 | Journal of HarbinInstitute of Technology2011，，： | 1 |
| 8 | A novel inflatable rings supported design and buoyancy-weight balance deformation analysis of stratosphere airships显示文摘Owing to the unique advantages in flight altitude,dwelling time and wide coverage area,stratospheric airships provide permanent monitoring and surveillance for both civil and military applications.Here we propose a semi-rigid stratosphere airship design with circumferential high-pressure inflatable rings and a longitudinal carbon fiber skeleton supported inside.We perform numerical simulations to analyze the deformation characteristics during the whole ascending and descending process.An equivalent internal gradient pressure model of helium is established based on the capsule shape and buoyancy-weight equilibrium conditions.The implicit dynamic method is used to deal with the large deformation of the airship capsule under a low negative pressure condition.Deformation and load-bearing performance of the airship capsule,inflatable ring,skeleton,and suspension line are obtained under different working conditions.The results show that the airship,supported with the inflatable rings and the suspension lines,effectively maintains the shape and ensures the stiffness during the ascending,dwelling,and descending stages,especially suffering from negative pressure. | Weinan GAO Ji ZHANG Teng MA Guochang LIN Yuanpeng LIU Changguo WANG Huifeng TAN | 2022 | Chinese Journal of Aeronautics2022，35，1： | 1 |
| 9 | A Simple Analysis Method for Contact Deformation of Tire 显示文摘 | Yu Zengxin Tan Huifeng Du Xingwen | 2001 | Vehicle System Dynamics2001，36，6： | 1 |
| 10 | Numerical simulations for gas-structure interaction in inflated deployment of folded membrane boom显示文摘It is very important for gas-structure interaction between compressible ideal gas and elastic structure of space folded membrane booms during the inflatable deployment.In order to study this gas-structure interaction problem,Arbitrary Lagrangian-Eulerian(ALE) finite element method was employed.Gas-structure interaction equation was built based on equilibrium integration relationship,and solved by operator split method.In addition,numerical analysis of V-shape folded membrane booms inflated by gas was given,the variation of inner pressure as well as deployment velocities of inflatable boom at different stage were simulated.Moreover,these results are consistent with the experiment of the same boom,which shows that both ALE method and operator split method are feasible and reliable methods to study gas-structure interaction problem. | Jianzheng Wei Huifeng Tan Jianxin Yu Xingwen Du | 2012 | Theoretical & Applied Mechanics Letters2012，2，2： | 1 |
| 11 | Membrane buckling patterns and secondary buckling analysis 显示文摘 | LI Yunliang TAN Huifeng WANG Changguo | 2008 | International Journal of Space Structures2008，23，3： | 1 |
| 12 | AN IMPROVED JONES-NELSON NONLINEAR MATERIAL MODEL AND RUBBER COMPOSITE LAMINA ANALYSIS显示文摘A Jones-Nelson model has been applied to depict nonlinear stress-strain relations ofcomposite laminae,where mechanical properties were expressed by strain energy density.The nonlin-ear material matrix is only a function of the strain energy density.Then a material model could beconveniently applied under complex stress condition.In this paper,by introducing large displacementstress-strain measurement and varying-Poisson’s ratio idea,an improved Jones-Nelson material modelis presented,where the expanding problem of material properties and convergence problems are over-come.Meanwhile a discuss of the reorientation of fiber and a material nonlinear analysis of rubbercomposite lamina under super large deformation conditions are made.The prediction results of im-proved material model are in fairly good agreement with those of the experiments. | Tan Huifeng Liu Yuyan Du Xingwen | 1998 | Acta Mechanica Solida Sinica1998，11，1： | 0 |
| 13 | Methods of configuration test and deformation analysis for large airship显示文摘In recent years, high-altitude aerostats have been increasingly developed in the direction of multi-functionality and large size. Due to the large size and the high flexibility, new challenges for large aerostats have appeared in the configuration test and the deformation analysis. The methods of the configuration test and the deformation analysis for large airship have been researched and discussed. A tested method of the configuration,named internal scanning, is established to quickly obtain the spatial information of all surfaces for the large airship by the three-dimensional(3D) laser scanning technology. By using the surface wrap method, the configuration parameters of the large airship are calculated. According to the test data of the configuration, the structural dimensions such as the distances between the characteristic sections are measured. The method of the deformation analysis for the airship contains the algorithm of nonuniform rational B-splines(NURBS) and the finite element(FE)method. The algorithm of NURBS is used to obtain the reconfiguration model of the large airship. The seams are considered and the seam areas are divided. The FE model of the middle part of the large airship is established. The distributions of the stress and the strain for the large airship are obtained by the FE method. The position of the larger deformation for the airship is found. | ZHAI Yutao SHEN Yongzheng YAN Xiangbin TAN Huifeng | 2022 | Journal of Systems Engineering and Electronics2022，33，4： | 0 |
| 14 | Fatigue Damage Accumulation of Steel/rubber Composite显示文摘疲劳损坏累积[+- 20 deg ] 把压成薄片的钢绳索在装载的 T-T 下面合成的增强的橡胶被学习。结果显示周期的最大的紧张的增加在疲劳的过程展出三阶段的趋势。宏观的疲劳损坏从在圆柱的快克形式的钢绳索的结束开始。与裂缝数字,绳索 / 矩阵接口 debonding 和生长的增加一起的 Damagepropagates 内部厚度裂缝。由使用动态作为参数爬,一个线性疲劳损坏累积模型被建立。这个模型能在双装载条件下面被使用估计标本的剩余疲劳生活。 | Zhenhui TIAN Huifeng TAN Xingwen DU | 2006 | Journal of Materials Science & Technology2006，22，5： | 0 |
| 15 | Investigation on the radioactivity levels of seawater,sediments,and biota in Daya Bay,China显示文摘Objective:To investigate the radioactivity levels of seawater,sediments,and biota in the Daya Bay sea area,China,in order to establish the radioactivity baseline values,and provide basic data for the assessment of potential radiological risks that might result from the application of nuclear technology or human activities.Methods:Samples of seawater,sediments,and biota were collected from the Daya Bay sea area and analyzed.Their radioactivity baseline data were then compared with information from other regions in China and around the world reported in related literature.Results:For the seawater samples,the activity concentrations of natural radionuclide ^(40)K were 9.9-10.4 Bq/L,while ^(238)U,226Ra,^(210)Pb,^(137)Cs,and ^(110)Ag^(m) were below the minimum detectable activity(MDA).Regarding the sediment samples,the activity concentrations of ^(238)U,^(228)Ra,^(226)Ra,^(210)Pb,^(40)K,and ^(137)Cs were 38.1-40.4,49.1-53.7,32.6-38.6,59-95,590-650,and 0.48-0.88 Bq/(kg dry weight),respectively,while ^(110)Agm was below the MDA.For the marine shrimps in the biota samples,the activity concentrations of ^(228)Ra,^(226)Ra,^(40)K,and ^(137)Cs were 1.14-2.75,0.17-0.43,63-76,and 0.038-0.045 Bq/(kg wet weight),respectively,while ^(238)U,^(210)Pb,and ^(110)Agm were all below the MDA.Furthermore,for the marine fishes in the biota samples,the activity concentrations of ^(228)Ra,^(226)Ra,^(210)Pb,^(40)K,and ^(137)Cs were 2.1-19.7,0.32-3.78,<2.2-2.8,59-70,and<0.007-0.026 Bq/(kg wet weight),respectively,while ^(238)U and ^(110)Ag^(m) were all below the MDA.^(228)Ra was found to be concentrated in Osteomugil ophuyseni with 19.7 Bq/(kg wet weight).Conclusions:The radioactivity levels of seawater and marine sediments in the Daya Bay sea area are within the range of the normal background values.Osteomugil ophuyseni exhibited higher concentrations of ^(228)Ra than other species in this study,while the other species in the biota show no significant difference in the radioactivity levels from data in relevant literature. | Fan Cui Honghui Huang Yi Shen Zhan Tan Pengxiang Qu Ming Dai Hongwei Yu Weixu Huang Zixiang Wu Huifeng Chen Weizhen Guo Yuxin Jia Yanbing Liu | 2023 | Radiation Medicine and Protection2023，4，3： | 0 |
| 16 | SIX-VARIABLE GEOMETRICAL NONLINEAR LAMINATED THEORY FOR LARGE DEFORMATION显示文摘A six-variable geometrical nonlinear shear deformation laminated theory is presented bywhich normal stress and strain distribution can be calculated.By considering some affective factorsthat were neglected under the finite deformation condition,an improved yon Karman geometrical non-linear deformation-strain relation is used for large deformation analysis.After analyzing the bendingproblem of laminated plates,and comparing it with 3-D elasticity solutions and J.N.Reddy five-vari-able simple higher-order shear deformation laminated theory,we can conclude that a satisfactory cal-culation precision has been achieved,which shows that it is especially suitable for the calculation in thecondition of large deformation and the laminated thick plate analysis. | Tan Huifeng Yu Zengxin Du Xingwen | 1999 | Acta Mechanica Solida Sinica1999，12，3： | 0 |
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