期刊：
Metallurgical and Mining Industry,2015年7(8):78-85 ISSN：2076-0507
通讯作者：
Zou, Shuliang(3467593@qq.com)
作者机构：
[Zhang, Min] School of Nuclear Science and Technology, University of South China, Hengyang, China;[Zhang, Min; Zou, Shuliang] Hunan Provincial Key Laboratory of Emergency Safety Technology, Equipment for Nuclear Facilities, Hengyang, China;[Zhang, Min; Zou, Shuliang] School of Math and Physics, University of South China, Hengyang, China
通讯机构：
School of Math and Physics, University of South China, Hengyang, China
关键词：
Concentration dominance of adiacent point;Cubic spline interpolation;Inversion;MCNP program simulation;Radiation concentration field;Structure
摘要：
In this paper, the inversion of the particle field is put forward by a function constructed for solid radioactive sources. Based on the inverse proportion between concentration and the square of the distance from the radioactive source, the concentrations surface near the radioactive source is sharp, steep and concave. The concentration surface may be convex where the nuclear radiation field is restored with sparse data by interpolation or fitting. Hence we make use of mathematical construction techniques to construct concentration function tactfully. An inversion model is established which is based on the concentration of nodes in the grid. The concentration value of the grid lines is restored by the cubic spline interpolation. According to an idea of concentration dominance of adjacent point, the function of interior point of grid is structured, which is consistent with the characteristics of the radiation field. During the simulation experiment, concentration value of node is obtained by MCNP program based on the Monte Carlo method. It is verified that the concentration function is close to the real concentration field. Therefore inversion method is feasible, which provides theoretical basis for radioactive sources search and safe evacuation.
作者机构：
[何志锋; 邹树梁] Hunan Provincial Key Laboratory of Emergency Safety Technology and Equipment for Nuclear Facilities, Hengyang, 421001, China;[朱志超; 王晓冬; 谭桢干; 宋英明] School of Nuclear Science and Technology of University of South China, Hengyang, 421001, China;[王晓冬] School of Electrical Engineering of University of South China, Hengyang, 421001, China;[贺丹; 徐守龙] Hunan Provincial Key Laboratory of Emergency Safety Technology and Equipment for Nuclear Facilities, Hengyang, 421001, China, School of Nuclear Science and Technology of University of South China, Hengyang, 421001, China
通讯机构：
[Zou, S.] H;Hunan Provincial Key Laboratory of Emergency Safety Technology and Equipment for Nuclear Facilities, Hengyang, China
作者机构：
[Zou Shuliang; Li Pengxue; Tang Dewen; Liu Bing] Hunan Key Laboratory of Nuclear Facilities Emergency Safety Technology and Equipment;[Zou Shuliang; Li Pengxue; Tang Dewen; Liu Bing] School of Mechanical Engineering,University of South China
会议名称：
第十届中国钢铁年会暨第六届宝钢学术年会
会议时间：
2015-10-21
会议地点：
上海
会议论文集名称：
第十届中国钢铁年会暨第六届宝钢学术年会论文集
关键词：
MPM;finite element model;continual tube rolling;simulation
摘要：
Based on the characteristics of MPM deformation process,a thermal-mechanical coupled model of this process was established by the three-dimensional elastic-plastic finite element method.Some important parameters such as the rolled product size in each stand,the temperature variation curves of the key nodes on the tube,the rolling force and torque of each roller,and the equivalent stress and strain of the tube were analyzed using this model.The analysis results are as follows: The external diameter and wall thickness are alternate reduced between the pass bottom position and the roll gap position and tend gradually to finished size; The temperature of nodes,contacting with mandrel or rolls,decrease for heat transfer between tube and mandrel,tube and rolls,rube and surroundings,while the temperature of internal nodes increase for plastic work and decrease following for conduction within tube; The flow law of metal is that the metal in the bottom of pass is radial compressed,and flow towards the roll gap position or along the axial direction.Comparison between simulation solutions and experiment results shows a good agreement,which means that this model is capable of simulation MPM deformation process as well as forecasting product quality.
摘要：
采用蒙特卡罗软件MCNP5程序建立挖掘机安全作业舱及内部驾驶人员实验模型,研究在辐射源（钴-60）类型不同和源距不同的情况下,不同材料及不同结构的安全作业舱屏蔽γ射线的能力.分析讨论人体各部位剂量率值以评价安全作业舱的屏蔽效果,并依据电离辐射防护与辐射源安全基本标准（GB18871—2002）规定的工作人员的照射水平应低于0.01 m Sv/h的剂量限值,确定安全作业舱结构的设计方案.此次研究为挖掘机驾驶舱屏蔽设计提供必要的研究数据和设计依据,使驾驶舱在野外高放射环境下能够有效地屏蔽γ射线,保护驾驶人员的辐射屏蔽安全.
作者机构：
[Zhang Min; Zou Shu-liang] Univ South China, Sch Nucl Sci & Technol, Hengyang 421001, Peoples R China.;[Zhang Min] Univ South China, Sch Math & Phys Sci, Hengyang 421001, Peoples R China.;[Zhang Min; Zou Shu-liang] Hunan Prov Key Lab Emergency Safety Technol & Equ, Hengyang 421001, Peoples R China.;[Guo Shuai] CRUN Power Equipment Co Ltd, Zigong 643000, Peoples R China.
会议名称：
International Conference on Advances in Mechanical Engineering and Industrial Informatics (AMEII)
会议时间：
APR 11-12, 2015
会议地点：
Zhengzhou, PEOPLES R CHINA
会议主办单位：
[Zhang Min;Zou Shu-liang] Univ South China, Sch Nucl Sci & Technol, Hengyang 421001, Peoples R China.^[Zhang Min] Univ South China, Sch Math & Phys Sci, Hengyang 421001, Peoples R China.^[Zhang Min;Zou Shu-liang] Hunan Prov Key Lab Emergency Safety Technol & Equ, Hengyang 421001, Peoples R China.^[Guo Shuai] CRUN Power Equipment Co Ltd, Zigong 643000, Peoples R China.
会议论文集名称：
AER-Advances in Engineering Research
关键词：
Cement lining steel pipe;Rigid-flexible coupling;Plastic yield;Mathematical model
摘要：
It is because the matrix arrangement cement lining steel shear which have large elastic-plsatic deformation, yield deformation and slip body, as well as existing multiple complex nonlinear and coupling that traditional methods have not been able to meet the analysis requirements. Therefore, The coupled theory based on elastic mechanics, fracture mechanics and brittle fracture was put forward by considering the change" elastic deformation-plastic yield-shear fracture", and having in-depth discussion about the sheear process. Eventually, a complete mathematical model of matrix arrangement cement lining steel shear has been formed to provides theoretical basis for shear performance and mechanics analysis.
作者机构：
[刘永霞] School of Mechanical Engineering, University of South China, Hengyang, China;[刘永霞; 匡雅; 邹树梁] Hunan Key Laboratory of Nuclear Facilities Emergency Safety Technology and Equipment, Hengyang, China
