In this paper , a three - dimensional ( 3d ) program for the three - dimensional reactive flow fields of complicated geometric nozzle , which governed by the compressible full navier - stokes equations with realizable k - s turbulent model , has been upbuilt by using full implicit couple arithmetic and fvm ( finite volume method ) based on understanding and assimilation of a two - dimensional program group of cr ( chamber - radon ) . the new program fulfils the urgent need of numerical tools for simulating three - dimensional reactive flow - fields of hylte ( hypersonic low temperature ) and other latest nozzles , for which cr is out of action in simulation , and can be applied to simulate other chemical laser system , such as chemical oxygen iodine laser ( coil ) , overtone fluoride hydrogen , all - gas iodine laser , and so on . furthermore , some related topics about nozzles design and engineer ing also have been discussed 本文在二维cr ( chamber ? radon )程序研究的基础上，采用有限体积方法和完全隐式的耦合算法，通过求解带realizablek -两方程湍流模型的多组分、有反应的三维完全纳维埃?斯托克斯( n ? s )控制方程，建立了一套能够对复杂形状的三维喷管和光腔进行数值模拟的三维程序，解决了连续波df hf化学激光器增益发生器设计缺乏三维数值模拟工具的问题，并用该工具解决了cr程序无法实现的hylte等复杂三维喷管流场的理论模拟问题。
In this paper , the equilibrium equation of liquid bulge forming small tangential round corner is deduced for the complicated shape tube - type blank , the function equation between forming stress parameters are and the small corner are obtained ; the forming mechanism of the small tangential corner is studied , the matching relation between liquid bulging pressure and axial thrust is given , the optimal liquid bulging force parameters are determined 摘要本文推导出复杂形状管类件复合液压胀形时环向小圆角成形的平衡方程，得出了成形应力与环向圆角半径的解析关系；研究了环向小圆角成形机理，确定了液体胀形压力与轴向推力的匹配关系以及最佳的成形力参量。
In this paper , 130mm diameter hot - rolled bars ( 3 transus temperature is 798 c ) were used in experiments . the superplastic property of ti - 1023 alloy was studied systematically by the experiments of tensile and compression . the preparation method of fine - crystalline structure and the processing parameters of superplastic forging are optimized 本文以130mm热轧棒材为原材料，通过超塑性拉伸和超塑性压缩试验，对ti - 1023合金的超塑性进行系统研究，研究坯料细晶组织制备方法，优化超塑成形工艺参数，为高筋薄腹板复杂形状ti - 1023合金锻件超塑性等温模锻工艺的制定提供试验依据。
Rapid prototyping manufacturing ( rpm ) and rapid tooling ( rt ) can rapidly fabricate complicated prototypes and various mould & dies of higher dimensional precision and better surface roughness respectively . with those technologies , the objective of rapid product development ( rpd ) can be achieved consequently 快速成型技术( rpm )与快速模具制造技术( rt )能分别用来快速制造具有复杂形状的原型及具有高尺寸精度和低表面粗糙度的各类工模具，因而利用这两种技术能实现快速产品开发的目的。
Abstract : the mechanical analysis for arch bridge with flat hinge joints is a mechanical problem with non - linear boundary . mechanical analysis of methods at present is not clear , which can not calculate the arch bridge with changeable section and section with complicate shape . in this paper , the new method used to get the section resistance coefficient k is presented , the iterative procedure is established to calculate the internal forces of arch bridge with flat hinge joints , and the computational example is given . the method can apply to the arch bridge with any numbers of flat hinge joints and any shape section 文摘:平铰拱桥结构的受力分析属于边界非线性力学问题，目前的一些方法受力分析不太明确，对变截面、复杂形状截面等平铰拱桥无法进行计算.针对这种情况，提出了确定平铰截面抗力系数k的新方法，建立了计算平铰拱桥内力的迭代算法，并进行了实例计算，研究结果表明，这一方法对具有任意个平铰、任意形状截面的拱桥结构是适用的
Irregular body - fitted mesh finite volume method can really simulate complicated boundaries and improve the predicting precision so it is more ideal to process the complicated boundaries met often in open channels . in this point of view this approach is better than finete element method in which only few elements can be used and finite diffence method in which the rectangular grid is always used 非规则贴体网格有限体积法可以真实模拟复杂形状边界，提高边界附近的计算精度，能够较其他方法更理想地处理明渠水流中常常遇到的复杂边界问题，在这点上比只能构造少的单元数的有限单元法和一般采用矩形网格的有限差分法优越。
Traditional manual programming could not satisfy the programming requirement of complex shape parts already , but adopting the technology of automatic program not only shorten manufacture cycle of products to a great extent but also enhance the machining quality of products and capability of competition in the market , thus this technology has remarkably economic benefit and extensive foreground 传统的手工编程已不能满足复杂形状零件的编程需求，而采用自动编程技术大幅度地缩短了产品的制造周期，提高了产品的加工质量和市场竞争力，因而具有显著的经济效益和广阔的发展前景。
