Development of an automated design system of a CNG composite vessel using a steel liner manufactured using the DDI process

Fibre reinforced composite material is widely used in multi-industrial fields where weight reduction of the infrastructure is required because of its high specific modulus and specific strength. Using this material has two main merits. One is to cut down energy use by reducing weight and the other is to prevent explosive damage preceding the sudden burst generated by the pressure leakage condition. Therefore, pressure vessels using this composite material in comparison with conventional metal vessels can be applied in fields such as the defence industry, aerospace industry and rocket motor casings where light weight but resistance to high pressure are demanded. In this paper, a standard interpretation model for nonlinear finite element analysis of E-glass/epoxy filament wound around composite pressure vessels receiving an internal pressure is developed by using ANSYS, general commercial software that has been verified as accurate, and useful characteristics of the solution are based on Auto LISP and ANSYS APDL. Both the pre-processor for exclusive analyses of filament wound composite pressure vessels and the post-processor that simplifies the results of this analysis have been developed to help the design engineers.     

纤维缠绕复合材料压力容器健康监测研究进展

阐述了纤维缠绕复合材料压力容器健康监测传感器的特点和原理，对纤维缠绕复合材料结构健康监测工作中的固化过程监测、服役环境监测、内压和结构应变监测、损伤监测、爆破压力监测、泄漏监测进行了介绍和比较。最后，对纤维缠绕复合材料结构健康监测工作进行了展望，并提出了几点建议。     

基于ANSYS的菱形绕丝式超高压容器2D建模及应力场分析模块开发

考虑到新型菱形绕丝式超高压容器的结构特点,提出参数化建模的思想.通过ANSYS的APDL语言编制出参数化建模的宏命令,开发了该型容器的2D参数化建模模块,成功地解决了对该型容器进行有限元分析时建模繁琐的问题.在输入结构参数后即可自动完成模型构建、接触单元添加、网格划分等整个建模过程,为后续分析节省了大量时间,大大提高了分析效率.     

基于ANSYS的三闭式SMA混杂复合材料箱型薄壁梁的模态分析

采用有限元分析软件ANSYS对SMA混杂复合材料箱型薄壁梁进行了模态分析。首先建立了SMA混杂复合材料箱型薄壁梁的有限元模型，运用ANSYS软件中的Material Designer模块建立SMA/石墨/环氧树脂复合材料模型并获得其材料参数，通过ANSYS复合材料ACP模块对复合材料箱型薄壁梁进行铺层，然后对SMA混杂复合材料箱型薄壁梁进行模态计算，讨论了配置方式、铺层角度、宽高比、单层SMA体积含量、SMA安装位置对固有频率的影响。     

柴油机燃烧室不同结构对缸内流场的影响分析

运用三维建模软件Pro/E、有限元分析软件ANSYS Workbench和流体分析软件CFX三种软件进行联合仿真,研究燃烧室结构对柴油机缸内的速度场及压力场影响。先运用Pro/E进行三维建模,再通过ANSYS Workbench对其划分网格,最后通过ANSYS Workbench中的CFX模块对其不同燃烧室形状进行速度场及压力场分析,所得结果对分析提高燃油利用率和燃烧效率,为燃烧室的形状优化提供了依据。     

An Automated Process Planning and Die Design System for Quasi-Axisymmetric Cold Forging Products

This paper deals with an automated computer-aided process planning and die design system with which a designer can determine operation sequences even after only a little experience in process planning and die design of quasi-axisymmetric cold forging products by multistage former working. The approach is based on knowledge-based rules, and a process knowledge base consisting of design rules is built. Knowledge for the system is formulated from plasticity theories, empirical results and empirical knowledge of field experts. Programs for the system have been written in AutoLISP for AutoCAD with a personal computer. An attempt is made to link programs incorporating a number of expert design rules with the process variables obtained by commercial FEM software, DEFORM and ANSYS, to form a useful package. The system is composed of three main modules and five submodules. The process planning and die design module considers several factors, such as the complexities of preform geometry, punch and die profiles, specifications of available multiformers, and the availability of standard parts. The system uses 2D geometry recognition and is integrated with the technology of process planning, die design, and CAE analysis. The standardisation of die parts for wheel bolts requiring a cold forging process is described. The system developed makes it possible to design and manufacture quasi-axisymmetric cold forging products more efficiently.     

ANSYS二次开发及其在压力容器热态密封分析中的应用

利用ANSYS软件中的二次开发工具APDL语言，并结合通用编程工具VB和Fortran，开发出了核压力容器法兰密封系统瞬态密封分析程序系统中的前后处理数据交换程序并修改了该程序系统的求解器。该系统以ANSYS前后处理工具建立有限元模型并进行结果处理，用自行开发的瞬态耦合热弹性接触分析程序进行计算分析。ANSYS与计算分析程序间数据接口由自行开发的专用程序自动完成。该系统以ANSYS为平台，具有一定的通用性。将系统用于工程实际问题的分析，和试验结果吻合良好。     

颗粒增强复合材料弹性结构的双尺度有限元分析

颗粒增强方法是实现材料高性能化的重要手段。预测颗粒增强复合材料的细观结构与力学性能的关系是实现材料增强增韧的基础。为更好地分析、设计和优化复合材料,需要引入多尺度计算模型来考察细观结构对宏观力学性能的影响。基于均匀化理论,采用Voronoi有限元法对颗粒增强复合材料进行细观数值模拟,从而预测材料的宏观等效弹性常数,并直接得到材料的细观应力场。在细观尺度,首先假设满足平衡条件的应力场,采用Voronoi应力单元建立余能泛函并得到细观控制方程,最终形成可直接求解的线性代数方程组,从而求得应力系数并得到细观应力场。在宏观尺度,利用商业有限元软件ANSYS来进行宏观结构分析。通过均匀化方法求得弹性模量的宏观平均值,将其输入ANSYS系统即可进行计算,由此把宏细观两个尺度耦合起来,可以对颗粒增强复合材料构成的结构体进行有效的力学分析。     

复合材料起落架舱门结构优化设计

基于有限元软件ANSYS建立复合材料起落架舱门参数化有限元模型,基于三明治夹芯板理论将蜂窝芯层等效为均质的厚度不变的层板,以蜂窝夹芯高度与复合材料面板各铺层厚度为设计变量,以铺层板、蜂窝夹芯的强度,结构稳定性以及结构刚度为约束函数,以结构质量最轻为目标函数,基于ANSYS优化模块首先选择零阶法进行优化得到粗略解,其次选择一阶梯度优化法进一步对夹层结构进行优化设计,得到最优蜂窝芯子厚度、蒙皮各铺层厚度.     

新型氧气缓冲装置的优化设计

着重论述了新型氧气缓冲装置的设计过程,尤其是从选材和焊接上进行了优化.节约材料、降低成本的复合钢板的采用以及焊接坡口型式的创新研究具有较好的应用前景和社会价值,对同行业压力容器的设计、生产制造具有借鉴作用.     

A Surface Area Calculation and CAPP System for Non-Axisymmetric Deep Drawing Products

In this paper a surface area calculation for non-axisymmetric deep drawing products of elliptical shape was constructed for the design of blank shapes of deep drawing products by using an AutoLISP function in AutoCAD software. A computer-aided process planning (CAPP) system for rotationally symmetric deep drawing products has been developed. In this study, a CAPP system for non-axisymmetric deep drawing products of elliptical shape was constructed using process sequence design. The system developed consists of four modules. The first is the recognition of shape module for recognising non-axisymmetric products. The second is a 3D modelling module for calculating the surface area for non-axisymmetric products. The third is a blank design module for creating an oval-shaped blank with an identical surface area. The fourth is a process planning module based on production rules that play the most important role in an expert system for manufacturing. The production rules are generated and upgraded by interviewing field engineers. The drawing coefficient, the punch and die radii for elliptical shape products are considered as the main design parameters. The suitability of this system was verified by applying it to a real deep drawing product. This surface area calculation and CAPP system should be very useful for reducing the lead-time for manufacturing and for improving the accuracy of products.     

压力容器的开孔补强结构优化设计

利用ANSYS对某开孔压力容器进行参数化建模,并完成了优化设计,由有限元结果与试验数据的比较表明,有接触假设的有限元方法,对应力场分布能够产生更好的理论预测,同时对补强圈与容器壳体之间的间隙变化的影响,也作了有益的探讨。     

电解锰阴极板超声波清洗机的声场研究

本文结合电解锰行业目前的状况,研发了一种针对电解锰阴极板的超声波清洗机。分析了超声波清洗的工作原理,并利用ANSYS有限元分析软件对不同频率下的超声波做了声场压力分布分析,有效的指导了超声波清洗机研发过程当中的频率选择问题。     

Al2O3sf/LY12棒材半固态挤压工艺温度场的有限元模拟与分析

基于瞬态热传导问题有限元法的基本原理，建立了半固态挤压成形过程中瞬态轴对称温度场的有限元模型。结合工艺试验采用的数据，利用有限元软件ANSYS对挤压成形复合材料棒材连续过程的温度场进行了数值模拟，得出了反映该过程温度场分布和变化情况的云图。结合试验研究和模拟结果对其工艺规律进行了深入分析，为进一步设计优化工艺参数提供了理论依据。     

2m3立式液氢高压容器的焊接研制

根据ASME最新规范要求,确定了-253℃工作温度下的高压容器的合适的焊接方法,根据焊接试验设计和优化了焊接坡口形式;在大量焊接材料试验的基础上选定了焊接材料及供货商,尤其是在液氢容器制造中采用国产的AT-316L焊条,实现了在超低温领域焊接材料的国产化,填补了国内空白。通过工艺评定试验,获得了优良的焊接试验结果;在制造过程中,通过了无损检测,水压试验、液氮深冷处理和气压试验,成功地制造了壁厚110mm的超低温压力容器。     

Development of an expert system for cold forging of axisymmetric product

This paper deals with an automated computer-aided process planning and die design system by which the designer can determine operation sequences even if they have little experience in process planning and die design for axisymmetric products. An attempt is made to link programs incorporating a number of expert design rules with the process variables obtained by commercial FEM softwares, DEFORM and ANSYS, to form a useful package. The system is composed of four main modules. The process planning and the die design modules consider several factors, such as the complexities of preform geometry, punch and die profiles, specifications of available multi-former, and the availability of standard parts. They can provide a flexible process based on either the reduction in the number of forming sequences by combining the possible two processes in sequence, or the reduction of deviation of the distribution on the level of the required forming loads by controlling the forming ratios. In the die design module optimal design technique and the horizontal split of the die insert were investigated for determining appropriate dimensions of components of the multi-former die set. It is suggested that the proposed method can be beneficial for improving the tool life of the die set in practice.     

The development of an automated process planning and die design system for multi former-bolt products

This paper deals with an automated computer-aided process planning and die design system by which a designer can determine operation sequences even if they have only a little experience in process planning and die design for multi former-bolt products. The approach to the system is based on knowledge-based rules; a process knowledge base consisting of design rules is built. Knowledge for the system is formulated from plasticity theories, empirical results and the empirical knowledge of field experts. Programs for the system have been written in Auto LISP for the AutoCAD using a personal computer. An attempt is made to link programs incorporating a number of expert design rules with the process variables obtained by commercial FEM software, DEFORM and ANSYS, to form a useful package. The system is composed of four main modules. The process planning and the die design modules consider several factors, such as the complexities of perform geometry, punch and die profiles, the specifications of available multi former, and the availability of standard parts. They can provide a flexible process based on either the reduction in the number of forming sequences by combining the possible two processes in sequence, on the reduction of deviation of the distribution and the level of the required forming loads by controlling the forming ratios. As the system using 2D geometry recognition is integrated with the technology of process planning, die design, and CAE analysis, the standardisation of the die parts for multi former-bolt products requiring cold forging process is possible. The system developed will be useful in reducing the trial-and-error os design engineers in determining the diameter and height of the initial cylindrical billet from the final product geometry and the intermediate necessary sequence.     

永磁弹簧单向阀的设计与特性研究

针对目前单向阀中因机械螺旋弹簧存在疲劳、断裂等导致其性能降低, 压力和流量损失增大等问题, 利用磁性材料“同性相斥、异性相吸”的原理, 提出斥力、引力两种永磁弹簧单向阀结构。利用ANSYS的Fluent模块对其进行流场仿真分析。在实验室条件下进行相同开启压力流量和压差-流量特性试验。结果表明:新型永磁弹簧单向阀结构合理, 斥力永磁弹簧单向阀开启压力最小, 反应最灵敏;引力永磁弹簧单向阀压力损失最小。两种永磁弹簧单向阀性能比机械弹簧单向阀优越。     

Development of an expert system for cold forging of axisymmetric product

This paper deals with an automated computer-aided process planning and die design system by which the designer can determine operation sequences even if they have little experience in process planning and die design for axisymmetric products. An attempt is made to link programs incorporating a number of expert design rules with the process variables obtained by commercial FEM softwares, DEFORM and ANSYS, to form a useful package. The system is composed of four main modules. The process planning and the die design modules consider several factors, such as the complexities of preform geometry, punch and die profiles, specifications of available multi-former, and the availability of standard parts. They can provide a flexible process based on either the reduction in the number of forming sequences by combining the possible two processes in sequence, or the reduction of deviation of the distribution on the level of the required forming loads by controlling the forming ratios. In the die design module optimal design technique and the horizontal split of the die insert were investigated for determining appropriate dimensions of components of the multi-former die set. It is suggested that the proposed method can be beneficial for improving the tool life of the die set in practice.     

面向机械检测类专业的技能训练模块研究与实践

针对高端装备制造业人才需求,结合专业人才培养规格,面向机械检测类专业开发先进检测技能训练模块,提出技能训练模块的开发策略与具体实施步骤,构建以技能模块为导向的课程体系。在机械制造与自动化、机械产品检测检验技术专业开设试点班,实践证明,在专业人才培养过程中引入技能训练模块课程,有效训练学生现代化岗前专业技能,提升学生就业竞争力,为职业院校机械检测类专业模块化人才培养模式改革提供借鉴与范例。