The Design of Circuit for Checking Short in HT-7U Superconducting Tokamak Device

The tokamak HT-7U project has been funded as a Chinese national project since 1998. The main object of the project is to build a nuclear fusion experimental device with divertor configuration, which is designed by the Institute of Plasma Physics, the Chinese Academy of Sciences (ASIPP). It is a full superconducting device, consisting of superconducting toroidal field (TF) coils and superconducting poloidal field (PF) coil. During the operation of the device, the operational parameter of device should be checked by technical diagnosis. This paper describes the design of circuit for checldng short between every two parts of the HT7U device. The main contents of design include circuit of data acquisition and data processing of computer.

INTERFERENCE CHECKING IN COMPUTER-AIDED PLANT DESIGN SYSTEM

In this paper, the interference checking of three-dimensional objects within a plant is discussed and accomplished, which offers an automated solution to the design problems inherent in multi-user, multi-model environments. Also, the collision detection among moving objects is presented and discussed, and some new ideas are proposed. These methods are successfully applied in our Plant Design System (PDS) and are proven to be very practical and efficient.

A New Chaotic Genetic Hybrid Algorithm and Its Applications in Mechanical Optimization Design

A new chaotic genetic hybrid algorithm(CGHA) based on float point coding was put forward in this paper.Firstly,it used chaos optimization to search coarsely and produced a better initial population.Then,a power function carrier was adopted to improve the ergodicity and the sufficiency of the chaos optimization.Secondly,the genetic algorithm(GA) was used to search finely and guaranteed the population's evolution.To avoid the search being trapped in local minimum,a chaos degenerate mutation operator was designed to make the search converge to a global optimum quickly.Finally,CGHA was used to solve a typical mechanical optimization problem of shear stress checking for a cylinder helix spring.Compared with traditional penalty function method,chaos-Powell hybrid algorithm and standard GA,CGHA shows better performance in solution precision and convergence speed than those of the algorithms.Therefore,CGHA is a new effective way to solve the problems in mechanical optimization design.

基于CFDesign和ANSYS的旋启式止回阀动力学分析

针对某旋启式止回阀在工作过程中摇杆断裂的问题,采用CFDesign软件进行流体动力学分析,然后以流体分析结果作为输入条件,在ANSYS软件中Explicit Dynamics模块进行显式动力学分析,最后对原结构进行优化设计并进行计算验证。分析结果表明:在阀门进口流速比较大的情况下,阀瓣和摇杆运动组件会快速撞击阀体限位凸台,从而在摇杆上产生远超过材料许用应力的高应力,导致摇杆断裂;采取增加加强筋并加过渡圆角的措施,可有效提高摇杆的强度。所用方法和分析结论对旋启式止回阀的计算分析和设计优化具有一定的参考价值。

A Small Simulated Logistics Transfer Robot Car Structure Design

As a new product of the development of modern science and technology,the research and development of logistics robot has become the focus of social attention.Robot sorting and handling is the designated project of Jiangsu University Robot Competition.According to the requirements of the competition,this paper designs a kind of logistics robot trolley which can identify and grab materials according to a given path and transport them to a predetermined location.The mechanical structure design,driving motor selection and mechanical checking calculation of the car are mainly completed.According to the later experiments,the results show that the desired results can be achieved.

Study on main contents of design of rock fill dam with face slab

With the development of economy, the adjustment of industrial structure, the improvement of people＇s living standard and the expansion of urbanization, the structure of the city has changed a lot. The proportion of industrial use of electricity decreased year by year, the proportion of household electricity, commercial electricity and public utilities increased year by year, the peak and valley change increased year by year. Therefore, the construction of hydropower project, to improve the current situation of the system of regulating the power grid, has a positive role in promoting. Reinforced rock fill dam with face slab in foreign countries has been built and at the dam more than 50m high dam more than 70 seats, of which more than 100m high dam 18. At present, Brazil estuary aliya rock fill dam is the highest dam in this kind of dam in the world, built in 1980, has been running well. Our reinforced rock fill dam with face slab design and construction technology in the introduction of digestion and absorption of foreign advanced experience in the foundation, the systemic research on a considerable scale. The design level and construction technology of the rock fill dam with face slab in our country have reached the international advanced level by the complete technology of the construction of the 100m level rock fill dam with face slab. This paper mainly from the rock fill dam with face slab, dam type selection and layout of water conservancy project comparison; dam profile design; detail dam; dam high determined; stability analysis; strength calculation; overflow capacity check aspects were studied.

Design Methodology Research of the Floating Foundation for the Offshore MW-Rating Wind Turbine

With the rapid growth of the offshore wind industry, the innovative floating offshore wind turbine is chosen as the most feasible device to harvest the vast wind energy in deep water area. However there is no practical design guide for the floating wind turbine especially the floating foundation. In this paper, based on the investigation on the worldwide floating wind turbine and current available expertise on floating platforms accumulated in offshore O/G （oil and gas） industry, an integrated design methodology is presented according to the specialized characteristics of wind turbine, including the type selection of foundation and mooring system, design standard, design procedure, design conditions, key technologies involved. Finally a semi-submersible floating foundation is designed to support certain megawatt-rating wind turbine of Goldwind and also performance analysis and code checks are performed to validate the design. The design method of the floating foundation provided in this paper is proved feasible and can be adopted in practical engineering design.

基于Kriging插值代理模型的轴流式止回阀多目标优化

基于Kriging插值代理模型,对轴流式止回阀的各项性能进行综合优化,具体的优化目标为:降低正向流阻;减小阀芯振动;提升止回性能。通过试验设计方案找到影响轴流式止回阀正向流阻的主要结构参数因素,并以其作为优化对象,通过Kriging插值法拟合主要结构参数对应的性能样本点,在保证拟合精度的情况下,使用NSGA-II遗传算法同时对3个主要结构参数进行多目标优化,得到了三目标Pareto前沿,经过权衡不同因素对性能指标的影响大小,最终得到了综合性能最优的结构参数为:阀瓣丰满度系数α_(1)=2.199,阀芯长度L=386.322 mm,阀芯半径R=113.997 mm。其对应的止回阀性能为:正向出口流量Q=161.839 kg/s,正向出口流速v=3.30235 m/s,止回阀进口压力p=97632.2287 Pa。相比优化之前,阀门正向流阻减小了1.2%,阀芯振动降低了0.24%,止回性能提升了2.3%。

10 MW级海上风电新型浮式基础结构强度分析

针对应用于50 m水深海域的10 MW海上风力机,设计由三浮筒及三立柱组成的新型浮式基础,建立带有骨材结构的有限元分析模型。对于有关此新型浮式基础的设计波参数,一般选用随机性设计波的方法来确定,对波浪载荷工况下的整体结构。重点研究浮筒的骨材尺寸以及骨材间距对新型浮式基础强度的影响规律,并得到纵横骨材尺寸组合对新型浮式基础整体强度的影响规律。研究表明,新型浮式基础结构高应力区域位于3个浮筒连接处,浮筒板单元应力水平受骨材尺寸和骨材间距的共同影响,采用合适的尺寸间距组合可在应力水平相当的情况下显著降低用钢量。

不同基础条件下预制板式无砟轨道结构设计与检算

基于城市轨道交通工程建设需求,在非预应力轨道板结构设计基础上,采用有限元软件建立了不同基础条件下的无砟轨道结构耦合模型,结合极限状态法,研究开展了综合考虑列车荷载、温度梯度和基础变形作用下预制板的弯矩及配筋计算。结果表明:合理的非预应力板式无砟轨道结构设计,能够满足工程建设需求,路基段承载能力极限状态配筋设计受偶然组合作用控制,不同基础类型的轨道板纵横向配筋均受正常使用极限状态标准组合控制。

基于阿贝尔群上的差分集构造LDPC码

本文给出了区组长度为3、4和5的平衡不完全区组设计,将设计的关联矩阵作为校验矩阵,从而构造出3种低密度奇偶校验码(LDPC,low-density parity-check code)。由于这些校验矩阵是准循环矩阵,所以构造的码是拟循环LDPC码(QC-LDPC,quasi-cyclic LDPC)。计算码的相关参数,并针对具体的例子通过与类随机码的译码性能进行分析比较,结果显示,所构造的码具有较好的性能。

基于Kano模型的幼儿园晨检台设计研究

幼儿园是学龄前儿童集体生活的场所,易导致交叉感染,社会关注度较高,所以晨检成为了保护幼儿健康的重要一环。文章首先分析了传统幼儿园晨检流程中的漏洞和不足,然后通过案例分析法分析现代晨检工具的发展现状,结合Kano模型分析晨检时的用户需求,最终设计了一款集测温、检测儿童疾病、消毒功能于一身的可移动智能一体化晨检台。以期为幼儿园晨检台设计提供新的思路,使晨检变得更加方便快捷。

SPMT在井口平台组块滚装装船方式中的应用

针对自行式模块化运输车(Self-Propelled Modular Transporter,SPMT)滚装装船方式,以蓬莱19-3油田4腿式井口平台组块为例,在称重布置、临时支撑布置、运输抬梁布置和轴线布置等方面对SPMT装船方案进行适配性设计,在组块强度、运输抬梁强度和SPMT车板强度等方面对该方案的运输强度进行校核,并对该方案进行拓展。该方案可为后续井口平台组块装船方案设计提供参考。

圆筒型FPSO总体强度校核设计波优化算法

针对圆筒型FPSO总体结构强度准静态设计方法依赖工程师经验的局限性,将设计波法引入圆筒型FPSO总体结构强度校核,提出了针对特征荷载选择的优化算法。该方法通过分析圆筒型FPSO总体结构承载特点和失效模式,结合常用特征载荷中有相同设计波的特征荷载,选择了舷侧外板波浪压力、上部模块重心处的水平和垂向加速度,作为设计波筛选的特征载荷;并根据圆筒型FPSO结构对称性,减少加载浪向,优化设计波搜索相位;基于本文方法的校核工况减少了60%,有效提升了校核效率。该方法已被应用于中国首条完全自主设计的圆筒型FPSO“海洋石油122”平台的强度校核中,校核结果通过了挪威船级社认证,该平台目前已完成设计,进入建造阶段,这也说明了本方法的可行性以及对后续同类FPSO设计的借鉴意义。

高磅级旋转法兰结构设计及有限元分析

为了更好地评估旋转法兰在高温、高压下的工作状态,在现有压力级别(300~900磅)旋转法兰的基础上,对1 500磅和2 500磅旋转法兰进行结构设计和建模,并对模型强度和刚度进行校核,同时采用ABAQUS软件进行有限元静态力学分析。结果表明:各公称直径下旋转法兰的计算应力均小于许用应力,刚度满足使用要求;压力等级和法兰尺寸对旋转法兰应力分布存在一定影响,1 500磅旋转法兰存在芯套小端高颈以及垫片与法兰盘相接触2个应力集中区域,2 500磅旋转法兰除上述2个应力集中区域外,其芯套台阶处也会产生应力集中;最大应力均出现在芯套小端高颈处,且最大应力小于材料许用应力,设计的高磅级旋转法兰满足使用要求。研究结果进一步丰富了2 500磅旋转法兰结构设计案例,可为高磅级旋转法兰结构设计提供参考。

基于BIM技术的管道支吊架设计与校核

传统管道支吊架设计往往依据现场实际情况及工程师自身施工经验进行,缺乏科学的受力分析及规划,返工及报废率高,安全隐患大。本文以安徽阜南农村商业银行股份有限公司总部金融大厦建设项目为例,利用BIM技术,对该项目管道支吊架进行深化设计和强度校核,出具校核计算书及支吊架材料报表,为项目的管道支吊架施工提供数据支持以及合理化建议,并为类似工程项目提供借鉴依据。

北京某山地项目结构设计与分析综述

北京某山地项目总建筑面积约92万m2,主体建筑由19栋叠拼别墅及5栋洋房组成,均为地上5层、主体高度150m,地下2层或3层。别墅和洋房均采用装配整体式剪力墙结构体系;各单体通过7个1层或2层地下车库连接。首先,根据工程概况及国家政策要求确定结构体系,并根据山地建筑特点对工程建设场地地质灾害进行评估;其次,结合场地实际情况对竖向设计方案进行相关论述;同时,对抗震设防烈度8度(020g)区土质边坡主体结构基础设计、边坡支护设计过程中的重难点及其解决方法进行具体陈述。研究及设计结果表明:结合台地高差通过选用合理的结构布置及计算措施,各子项计算指标可以较好地满足相关规范要求,结构设计安全、可靠。

便携式节点仪器维修工具套装的研究与探讨

“两宽一高”采集技术的普及催生了超大道数施工,国内很多勘探项目已实现了数万道采集。为了采集项目的高效运行,如何实现节点仪器维修工具快速转场以及更方便地辅助节点设备的维修、保养,成为本次研究的主题。本文对便携式节点仪器维修工具套装的设计给予初步探究,并基于有限元计算在跌落条件下对设计的工具套装进行机械性能校核。通过合理、统一的节点仪器维修工具管理,可以避免携带、运输过程中工具损坏及丢失,让节点维修过程更便携、高效。

小型水库除险加固工程主要水工建筑的安全与设计研究

某小型水库存在渗流稳定,溢洪道不满足泄洪要求的问题,这些安全隐患严重影响水库的安全稳定运行。以某小型水库为研究对象,在其除险加固工程的过程当中,对大坝坝体和溢洪道进行安全复核和加固设计,通过比对相应的除险加固方案,最终发现采用充填灌浆,重建溢洪道消力池等方案处理小型水库的病险问题具有良好效果。

基于.NETCore的会议考勤移动打卡系统设计与实现

随着移动互联网和移动设备的普及,管理人员开始通过手机等移动设备关注会议考勤信息,这不仅有助于及时掌握参会人员的出席情况,还能在必要时采取措施以支持会议的正常进行。其中,移动化的会议考勤打卡系统具有灵活性、便捷性等特点,参会人员可以随时随地进行打卡和签到,管理人员则可以实时查看和管理会议考勤数据,大幅提高了工作效率和管理水平。基于此,文章提出了一个基于.NET Core的会议考勤打卡系统。该系统结合了各类会议考勤和会议管理需求,不仅简化了会议考勤管理流程,还提高了工作效率,为管理人员提供了数据分析和决策支持。