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   plate forming 的翻译结果: 查询用时:0.186秒
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plate forming
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  板料成形
     Working process of stamping die CAD/CAE/CAM is stated; methods of geometric modelling for die surface and those of creation and edition of toolpath by using STRIM100 are highlighted; and ways of setting up libraries for typical die structures and standard parts and of analyzing plate forming are also discussed.
     介绍了冷冲模CAD/CAE/CAM工作流程,论述了采用STRIM100软件进行模具表面几何造型的方法和刀具运动轨迹的生成、编辑方法,以及冷冲模典型结构库、标准件库的建立方法和板料成形分析方法。
短句来源
     In this paper,facing the convergent problem of plastic forming using large incremental step,we deduced the iterative formula used in analysis of elastic-plastic plate forming finite element method.
     此文针对塑性成形有限元分析大增量加载的收敛性困难,推导了用于板料成形弹塑性有限元分析的牛顿一致迭代公式.
短句来源
  板材成形
     Numerical simulation of plate forming on three-roll bending machine using ABAQUS/Explicit
     利用ABAQUS/Explicit进行三辊弯板机板材成形数值模拟
短句来源
     There are implicit integration and explicit integration methods to solve the finite element formulations for plate forming simulation.
     用于板材成形模拟的有限元方程的求解方法主要有隐式积分和显式积分两种。
短句来源
     In the case of complex 3D forming analysis,such as plate forming,using implicit method needs long running time,however,the explicit method will be more efficient.
     对于复杂的三维变形分析,如板材成形,隐式方法需要很长的计算时间,而利用显式方法,计算时间大为缩短。
短句来源
     By using the general finite element program ABAQUS/Explicit,the plate forming process on three-roll bending machine has been simulated. The result of simulation is very significative to direct the production of plate forming.
     利用ABAQUS/Explicit通用有限元程序对三辊弯板机板材成形过程进行了模拟,模拟结果对板材成形的生产实践具有很好的指导意义。
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  “plate forming”译为未确定词的双语例句
     This paper introduces the design, implement and application of the PLC control system of metal wave plate forming machine.
     本文介绍了金属浪板成型机的PLC控制系统的设计、实现及应用。
短句来源
     The PLC Control System of Metal Wave Plate Forming Machine
     金属浪板成型机的PLC控制系统
短句来源
     Investigation of helix roller plate forming for model MLS_3-170 coal-cutting machine
     MLS_3-170型采煤机螺旋滚筒端盘压形的探讨
短句来源
     Presently, ship-hull curved plate forming generally adopts a typical technology of plate bending by flame and water in shipbuilding industry, which is called line heating abroad.
     目前造船业中普遍采用的船体曲面钢板成形的典型工艺是水火弯板,国外也称作线加热(line heating)。
短句来源
     Several important tectonic events took place in the Chinese continent during the Early Paleozoic, such as the amalgamation of Xiyu plate, forming a unified crystalline basement with the Cathaysian plate, development of widespread intraplate deformations in southern Yangtze plate, and the occurrence of Altay-Ergun collision zone.
     它们与苏格兰—阿帕拉契亚的加里东事件完全不同,在中国大陆出现了西域板块完成拼合,华夏板块构成统一结晶基底,南扬子板块广泛发育板内褶皱,此时还形成了阿尔泰—额尔古纳碰撞带等重要构造事件,而以中朝和北扬子板块为代表的其他板块则主要表现为稳定沉积,地块运移,并呈离散状态。
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  plate forming
The East Rift is offset by more than 300 km from the East Pacific Rise and its northern end has rifted into approximately 3 Ma lithosphere of the Nazca Plate forming a broad (70-100 km) zone of high (up to 4 km) relief referred to as the Pito Rift.
      
It is shown that the present approach and the model used in this study are effective and efficient for simulating triangle heating for the steel plate forming process in shipbuilding.
      
Our findings, finally, suggest a new method for isolating just fused but not further matured cell plate forming vesicles for biochemical studies.
      
They are probably both due to the metaphase plate forming near the pollen-grain wall.4.Exceptionally inTulipa the generative nucleus may divide in the pollen-grain instead of in the pollen-tube.
      
This forming way would facilitate temperature control and make plate forming automatically easy.
      
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Early in 1963, Y. H. Liu described a new antiarchian genus and species,Yunnanolepis chii, from the Lower Devonian of Yunnan. Because the materialsthen availabie for study were limited to the ventfal (internal) side of the headshield, many of its morphological characters remained unkown. Yunnanolepis has beententetively allocated to Family Pterichthyodidae, with reservation as to its exact sys-tematic position. The present paper gives more detailed descriptions of most of the antiarchianremains recovered in the...

Early in 1963, Y. H. Liu described a new antiarchian genus and species,Yunnanolepis chii, from the Lower Devonian of Yunnan. Because the materialsthen availabie for study were limited to the ventfal (internal) side of the headshield, many of its morphological characters remained unkown. Yunnanolepis has beententetively allocated to Family Pterichthyodidae, with reservation as to its exact sys-tematic position. The present paper gives more detailed descriptions of most of the antiarchianremains recovered in the past decade from the Lower Devonian of Cuifengshan,Qujing County, Yunnan. The specimens are mostly well perservred and have beenascribed to five species and four genera. With the exception of one genus and species,they are considered to represent a new antiarchian order including two new familiesas follows: Order Yunnanolepiformes ord. nov. Family Yunnanolepidae fam. nov. Genus Yunnanolepis Liu Yunnanolepis chii Liu Y. parvus sp. nov. Genus Phymolepis gen. nov. P. cuifengshanensis sp. nov. Family Quijinolepidae fam. nov. Genus Qujinolepis gen. nov. Q. gracilis sp. nov. Family uncertain Genus Zhanjilepis gen. nov. Z. aspratilis sp. nov. These new antiarchians are not markedly different from the various forms knownfrom the Middle and Upper Devonlan in the external morphological characters of thehead shield and the trunk; but these new forms differ markedly from the others ina number of important anatomical features, which are summerized as follows: 1. Head shield hexagonal, and with small orbital fenestra nearer to the anteriormargin than to the posterior; there is a rhombic depression in front of the orbitalfenestra, but without the preorbital recess generally present in the antiarchians; 2. Shoulder girdle with simple fossa axillaris and without process us brachialisgenerally seen in the later antiarehians, but with a pectoral fenestra resembling thoseseen in the Euarthrodires; 3. Posterior lateral plates do not fuse with posterior dorsal lateral plates in the trunk-armour, but are entirely independent plates, as in Remigolepis; 4. The bone plates forming the pectoral fin are short and small; and the pectoralfin is probably not subdivided into bo segments, but continued throughout its extent; 5. On the dorsal side of the head shield, the infraorbital sensory grooves are notin contact in the ethmoidal region, but ptoceed to the anterior border; supraorbitalsensory grooves well dereloped, those on the ethmoidal regon extend laterally alongthe anterior border of the preorbital depression, and then turn forward on the internalside of the infraorbital sensory grooves to the anterior border of the lareral plates;preopercular line well developed; 6. Scales thick and rhombic in outline; 7. No endocranium preserved in all of the available specimens; 8. Postpineal plate of the head shield broad, forming the posterior border of theorbital fenestra and sutures the lateral plates. The anterior side of the centro-nuchalplate does not reach the orbital fenestra, postmarginal plate well deve1oped; subanaldivision of the trunk armour short. Following Stensio (1931, 1959) who had proposed a scheme of classification onthe hasis of structure of the pectoral fins and had studied, the pectoral fins andshoulder girdles of Arthrodira and Antiarchi in detail, He considered the antiarchiansas componente of Arthrodira and have grouped them with the Euarthrodira. But theantiarchians from the Middle and Upper Devonian were all highly specialized in thestructure of the shoulder girdle and pectoral fins, and there is a great morphologicalgap between them and the Euarthrodira. The structure of the shoulder glrdle in theantiarchiase from Lower Devonian of Yunnan fills up this gap nicely, and this affordsconvincing evidences for connecting the antiarchians with the Euarthrodira and in-dicates that the two are closely related to each other. In the specimens from Yunnanthere is a spine-like process on the external side of the fossa axillaris extendingbackward which indicates that these forms may be more closely related to the spino-thoracidian Euarthrodira. In the Early Devonian antiarchians of Yunnan the head shield is with ornamentsextending to the rostral border and there is a median levater oif the ventral side ofthe premedian plate. These indicate that they are different from Remigolepis and Asterolepis in thestructure of the jaw apparatus, and the presumed rostral process of the ethmoidalregion of the endocranium is also apparently different from those in the two lattergenera. The otico-occipital depression is narrow and shallow, quite in contrast tothose seen in the otic region of the endocranium in Remigolepis and Asterolepis whichare broad and short. On the other hand, the new Chinese forms are more or lesssimilar to Remigolepis and Asterolepis in the shape of the plates on the head shieldand their relationship with orbital fenestra. Based on the above comparison, thepresent author prefers using the characters of the shoulder girdle and pectoral finsfor the higher catagories in the classification of the antiarchians as proposed byStensio, rather than adopting the criteria based on the types of the head shield as pro-posed by Gross (1965). It seems that the classification based on the criteria shownby the characters of the shoulder girdle and pectoral fins would indicate a relationshipcloser to the natural affinity of the various groups. Truely, there are also a number of similarities between the Early Devonian formsand Remigolepis or Asterolepis of later ages, but the antiarchians from Lower Devonianof Yunnan nevertheless possess many characters in the structure of shoulder girdle,pectoral fins, sensory grooves and scales etc., which are distinctly primitive andbasically different from those shown by the later forms. Therefore, it is here sug-gested that they represeat new taxa on the ordinal and familial levels. In addition,it may be pointed out that the new forms indicate closer relationship with Remigo-lepis than with Bothriolepis as shown by certain features in the structure of thepectoral fins and the trunk armour. Concluding remarks: 1. The antiarchians from the Lower Devonian of Yunnan is a primitive grouprepresenting an early stage in the evolutionary history of the antiarchians. 2. The structure of the shoulder girdle seems to indicate that Yunnanolepiformes(ord. nov.) convincingly provide a link between the Euarthrodires and the antiarchiansof the Middle and Late Devonian ages. 3. The resemblance in the structure of the pectoral fins between the EarlyDevonian antiarchians of Yunnan and Remigolepis indicates that the unjointed pec-toral fin composed of several small plates is a primitive state characteristic. 4. Thehe appears to be closer relationship between the early antiarchians ofYunnan and the spinothoracidian Euarthrodires and Remigolepis. 5. The endocranium are neither calcified nor ossified in the Early Devonianantiarchians. 6. The function of the preorbital depression is probably related to the posi-tion of nasal capsules and the development of the preorbital recess of the headshield. 7. In the early antiarchians, the infraorbital sensory grooves lack the suborbitalanterior branches and the distributional pattern of the supraocbital sensory grooveshows similarity to that in Chimaera manstrosa; preopercular grooves well developed. 8. The Early Devonian antiarchians of Yunnan had anteriorly situated orbitsand very thick rhombic scales. Apparently these are primitive characters.

本文研究的是最近十多年古脊椎动物与古人类研究所在云南早泥盆世采集的胴甲鱼(Antiarchi)化石,共计四属五种。这是迄今所知地质时代最早而且目前仅见于我国的胴甲鱼类。文中记述了它们的形态特征,并分别与其相近的属种作了对比,从而建立了胴甲鱼纲中的一新目。这一发现和研究,使我们比较全面地了解到我国早泥盆世胴甲鱼的形态结构,丰富了早泥盆世动物群的内容,更多地提供了划分地层的古生物依据;在鱼类进化史上,填补了胴甲类和真节甲类(Euarthrodira)之间的缺环,对进一步认识胴甲鱼类的起源和了解胴甲类的发展辐射也给以新的启示。

An experimental study on the local and overall interaction buckling strength of thin-walled channel section columns is presented in this paper.A total of eighteen columns with large width-thickness ratios were tested to failure. The advanced moire fringe method had been used in the process of experiment and some important conclusions on waveshape variation were obtained from a series of fringe patterns of buckled plates forming the column.A new analytical approach was also outlined and the details of theoretical...

An experimental study on the local and overall interaction buckling strength of thin-walled channel section columns is presented in this paper.A total of eighteen columns with large width-thickness ratios were tested to failure. The advanced moire fringe method had been used in the process of experiment and some important conclusions on waveshape variation were obtained from a series of fringe patterns of buckled plates forming the column.A new analytical approach was also outlined and the details of theoretical formulation of equation were given in Ref,[1].The experimental results have been compared with author's theoretical solutions and P.R.C. current specification and a modified Perry's formula for designing centrally loaded channel section columns is proposed to predict the interaction buckling strength.

本文介绍了18根冷弯薄壁槽钢柱的相关屈曲试验观测结果,并简要地介绍了作者的理论分析方法。在试验过程中采用了先进的光栅技术,获得了加载过程中柱子壁板屈曲后的波形变化规律。基于试验与现行薄壁型钢规范的比较,提出了现行规范的修改建议式。

A computer-aided-design method is proposed for plate forming in cold bending. The elastic-plastic and springback analysis is performed by the increament iteration approach. By using the step-by-step unloading and loading procedure, the shapes of plates after springback are predicted and the contours of dies designed. The method put forward by the authors is realized on the microcomputer and the calculated results are in good agreement with experimental ones.

利用增量迭代法进行工件的弹塑性分析及回弹量计算,提出了用逐步却载及加载法预测板件的最终成形形状及设计模具形状。本方法在微机上得到实现,并与实验结果取得相当一致的吻合。

 
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