Optimization of the Water-Cooled Structure for the Divertor Plates in EAST Based on an Orthogonal Theory

An orthogonal experimental scheme was designed for optimizing a water-cooled structure of the divertor plate.There were three influencing factors:the radius R of the watercooled pipe,and the pipe spacing L₁ and L₃.The influence rule of different factors on the cooling effect and thermal stress of the plate were studied,for which the influence rank was respectively R>L₁>L₃ and L₃>R>L₁.The highest temperature value decreased when R and L₁increased,and the maximum thermal stress value dropped when R,L₁ and L₃ increased.The final optimized results can be summarized as:R equals 6 mm or 7 mm,L₁ equals 19 mm,and L₃ equals 20 mm.Compared with the initial design,the highest temperature value had a small decline,and the maximum thermal stress value dropped by 19%to 24%.So it was not ideal to improve the cooling effect by optimizing the geometry sizes of the water-cooled structure,even worse than increasing the flow speed,but it was very effective for dropping the maximum thermal stress value.The orthogonal experimental method reduces the number of experiments by 80%,and thus it is feasible and effective to optimize the water-cooled structure of the divertor plate with the orthogonal theory.     

基于微笑曲线的我国大型建筑业企业转型升级研究

近年来,我国建筑业生产规模逐渐扩大,但是这种增长主要是靠投资拉动。盈利能力低、竞争过于激烈、科技创新能力不足、高等级人才缺失等问题仍然困扰着建筑业企业。为了寻找适合大型建筑业企业的升级路径,引入微笑曲线理论对我国大型建筑业企业的转型升级进行研究,在分析企业发展现状的基础上,紧密结合微笑曲线理论提出我国大型建筑业企业转型升级新思路,即建筑业企业应结合自身情况,适时提高设计研发能力、品牌影响力、生产管理能力等,以推动企业转型升级。     

ITER真空室中子屏蔽组件的热-静力学有限元分析

根据ITER(International Thermonuclear Experimental Reactor)真空室中子屏蔽组件的设计概念和结构特点,应用有限元分析软件ANSYS对结构组件进行静力学分析和热-结构耦合分析.有限元计算结果表明,等离子体中心破灭事件(central disruption 27msec--CD27ms)下的巨大瞬间电磁载荷对其产生的应力与变形远小于真空室温度环境造成的应力影响,尤其在接触应力计算上表现最为明显.因此,根据强度分析的结果重新对中子屏蔽组件的结构方案进行修改,分析结果表明改进后的结构更加合理.     

Structural Analysis of ITER Lower In-Vessel-Viewing Port

A finite element model of the International Thermonuclear Experimental Reactor （ITER） in-vessel viewing port was developed by the ANSYS code in order to evaluate the stress level of this structure. The thermal, elastic and modal analyses were made in succession based on the loads designated by the ITER International team. The designed loads include electromagnetic loads, seismic loads, pressure, temperature and gravity. The preliminary results of the finite element analysis （FEA） show that the stress intensity exceeded the allowable stress and the maximum stress was concentrated in the geometric discontinuous region of the shroud stub extension （SSE）. Therefore, the SSE has been modified recently. For the modified structure, we found that the stresses do not exceed the allowable value for all load combinations. In addition the modal analysis results show that the natural frequencies of the IVV port structure are located in the typical diapason of seismic excitation.     

ITER运输车双密封门结构静力学分析

根据ITER运输车双密封门的结构特点,在三种工况下选择两种不同的材料,应用有限元分析软件ANSYS对密封门典型部件进行建模和结构静力学分,并考察LY12和SS316L(N)这两种材料在三种工况下的应力和变形情况.有限元的分析结果给下一步的优化设计和结构选材提供了参考.     

ITER遥控运输车双密封门系统FMEA分析

遥控运输车是国际热核实验堆(ITER,International Thermonuclear Experimental Reactor)用于堆和热室之间的运输工具.双密封门是遥控运输车上可分开,分别密封真空室窗1:7和运输车的关键部件.介绍ITER遥控运输车及双密封门结构与工作程序,对双密封门系统进行FMEA(Failure Modes and Effects Analysis)分析并作出分析表,找到薄弱环节,为防止及减少故障的发生提供依据.也为下一步ITER其他系统及重要部件的可靠性分析提供范例.     

基于虚拟模型的大型装置零件反求设计方法

针对大型装置的无实物模型零件系统设计,介绍了一种新型的产品零件反求设计方法,阐述了其基本设计过程.首次提出了零件虚拟模型的概念,重点描述了虚拟模型的创建和数字化方法,并对零件CAD模型的优化设计方法进行了研究.最后利用设计实例说明了产品零件的反求设计过程.     

托卡马克第一壁涂层工艺方法的比较

托卡马克第一壁直接面向高温等离子体，它的性能优劣影响热核聚变的稳态反应。讨论了第一壁材料的选取情况，比较了几种常用的托卡马克第一壁涂层工艺，提出了应用宽带激光熔覆方法进行激光-粉末耦合第一壁的新思路，并对该制造方法进行了设计。激光熔覆技术为制造第一壁涂层提供了一种新的工艺途径。     

一种新型载气式激光熔敷送粉器

为解决超细粉末的送粉问题，研究一种新型的载气式送粉器，粉末通过粉轮均匀拨送，能在气流作用下经落粉腔分散后流出．选用NiO2C(Ni60)、A12O3-Cr2O3和WC这3种不同料性的超细合金粉末应用该装置进行了气动送粉试验，对送粉器的性能进行了数据测定争界定，并应用上述超细合金粉末进行了激光熔敷试验，获得了理想的效果．     

ITER真空室内屏蔽结构的虚拟设计

介绍了ITER（国际热核聚变实验堆）真空室内屏蔽结构的特点，提出了内屏蔽结构的虚拟设计体系结构模型。利用参数化技术完成了屏蔽单元的实体建模，应用有限元分析方法进行了结构分析，为优化设计提供了依据。基于虚拟装配平台实现了屏蔽单元的实时修改、信息检测及内屏蔽结构的装配仿真，实现了大型装置结构的虚拟产品化。