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变位     
相关语句
  displacement
     when θ >0. 2°, η and the overturning-resisting capacity of the cylinder decrease evidently. So it is suggested that θ=0.2° is the critical value for the deflection of the cylindrical structure. And when θ =0. 2°, the ratio of the horizontal displacement at the top of the cylinder,△1 , which is attributed to the inclined angle θ, to the height of the cylinder,H, is 3.5×10-3.
     而转角θ>0.2°时,η和圆筒抗倾能力都明显减小.据此提出圆筒变位临界值θ=0.2°,此时,由转角θ产生的筒顶水平变位△1与筒高H之比为3.5×10-3.
短句来源
     2. Problems of controlling displacement of structure to prevent collapse of structure.
     2.控制结构变位防止结构倒塌问题;
短句来源
     The geometric nonlinear factors include cable sag, beam-column effect and large structure displacement, and the aerodynamic nonlinear factors are wind incidence angle effect and self-excited force.
     分析中综合考虑了结构几何非线性和气动非线性,其中结构几何非线性因素包括拉索垂度、内力引起的梁 柱效应及结构大变位等,气动非线性因素包括攻角效应、自激力等.
短句来源
     6) Calculating and analyzing the dimensional and whole work capability by the finite element method, based on the calculating results, the horizontal displacement and stressdistributing of the beams on top of the piles is analyzed and the section sizes is optimized.
     6)运用有限元法对空间整体工作性能进行计算分析,根据计算结果分析桩顶水平变位以及是否需要设置连梁,进而分析连梁的应力分布,并优化其截面尺寸;
短句来源
     THE THEORY AND THE PRACTICE SIMULATING STRUCTURAL STRESS FIELD BY VIRTUAL DISPLACEMENT METHOD
     假想变位法模拟构造应力场的理论与实践
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  addendum modification
     Through the analysis of the cold extrusion tehnologies to small module gear with addendum modification, the feasibility to produce the gear using extrusion technology was discussed, which is meaningful to improve the mechanical performance of the gear- drive parts and to reduce the cost.
     通过对传动用小模数变位内齿轮的冷挤压成形技术的分析、冷挤压成形工艺的探讨,阐述了冷挤压成形技术在小模数变位齿轮的实际加工的可行性,这对提高传动零件的机械性能和降低产品成本有着广泛的意义。
短句来源
     Calculation of Contact Stress and Selection of Addendum Modification of Plastic Gears
     塑料齿轮齿面接触应力计算及其变位系数选择
短句来源
     Determination of the Addendum Modification Coefficients for NN Type of Involute Planetary Gear Transmission
     NN型行星传动变位系数的确定方法
短句来源
     The Optimization for the Addendum Modification Coefficient of Spur Gear
     直齿圆柱齿轮变位系数的优化选择
短句来源
     According to the characteristics in design of involute gear sharper cutter, this paper analyses the key parameters in design of the involute gear sharper cutter , such as how to select the coefficient of addendum modification and the number of teeth, and puts forward a practical method of involute gear sharper cutter CAD, namely involute gear sharper cutter CAD expert system, and stresses the indicative method of gear information, the organization and management of Knowledge Base .
     根据渐开线插齿刀设计的特点 ,分析了渐开线插齿刀设计的关键参数 ,即变位系数和齿数的合理选择 ,进而提出一种实用的渐开线插齿刀CAD的方法———渐开线插齿刀CAD专家系统的模式 ,并着重介绍了专家系统模式中的齿轮信息表示法和知识库的组织和管理。
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  metachoresis
     Ten blood indices about gastrectasia and enteric metachoresis in 13 Mules were measured.
     检测13例骡胃扩张、小肠变位的10项血液指标。
短句来源
     To correct metachoresis uterus must advert: 1.cofirm the right type and diagnosis definitely;
     纠正子宫变位应注意:1.定准类型,明确诊断;
     The authors consider that this is a new-type fracture in forearm in juries, The mechanism and clinical metachoresis are different both from those of any type of Monteggia's fracture and from upper 1/3, or middle-1/3, or lower-radial fracture and forearm double fracture. The injury is caused by an upward prone conducting violence.
     认为是前臂创伤中一种新类型骨折,其损伤机制和临床变位情况,既不同于孟氏骨折的任何一型,也不同于桡骨干中1/3、下1/3骨折和前臂双骨折,而是由一种向上并旋前的传导暴力所造成。
短句来源
     The total amount of leukocyte was significantly higher in the cases with intestine necrosis in enteric metachoresis.
     肠变位、肠管坏死病例其白细胞总数明显升高。
短句来源
     Method: To analyze the structural relationship of uterine body and cervix, uterine body and vagina, along with the cervix external aperture of the position in the vagina ,in the different types of metachoresis uterus.
     方法:剖析各类型变位子宫的宫体与宫颈、宫体与阴道的结构关系以及宫颈外口在阴道中的方位。
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  displacement shift
     Discuss the effect of rotational speed, damping, and modification coefficient etc to dynamic load, and make an emphatic analysis to the stiffness of large displacement shift, contact ratio, the location of node and the dynamic load factor etc.
     讨论了转速、阻尼、变位系数等对动载荷的影响,对大变位时的刚度、重合度、节点所处位置、动载系数等进行了重点分析。
短句来源
     This paper,combined with engineering practice,does some research on designing the gabled frames heel,the portal strut,the displacement shift,the connecting gusset and so on,by setting up the computation model and the contrast analysis,to optimize the structural design and lower the engineering construction cost.
     结合工程实践,通过计算模型的建立、对比分析,特别对门式刚架结构体系中的柱脚、支撑、变位、连接节点等设计问题进行了研究,以优化结构设计、降低工程造价。
短句来源

 

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      displacement
    Our approach generalizes Lévy's midpoint displacement technique which is used to generate Brownian motion.
          
    Finite element simulations for compressible miscible displacement with molecular dispersion in porous media
          
    We consider a nonlinear parabolic system describing compressible miscible displacement in a porous medium [5].
          
    Galerkin method for completely compressible displacement with molecular diffusion and dispersion
          
    In this paper, the numerical approximation by Galerkin method for completely compressible miscible displacement with molecular diffusion and dispersion in porous media is considered.
          
    更多          
      displacement shift
    It was found that in the Σ5 case two Burgers vectors of the structure are not simple basic complete displacement shift lattice (DSC) vectors and are larger than any one of them.
          
    Burgers vectors associated with structural ledges and misfit-compensating ledges are displacement shift complete (DSC) lattice vectors.
          
    They tend to cleave the carbene ligand with a simultaneous hydrogen displacement/shift.
          


    Single storied industrial buildings composed of steel trusses and reinforced-concrete columns are very common. As the upper joints are hinged, the stresses in the columns are not influenced by the elastic properties of the trusses; while the upper joints are rigid, methods of analysis are usually based on the assumption that the moment of inertia of a steel truss may be taken as equivalent to that of a beam. In this paper, the author making use of the principle of least work reviews the equations for calculating...

    Single storied industrial buildings composed of steel trusses and reinforced-concrete columns are very common. As the upper joints are hinged, the stresses in the columns are not influenced by the elastic properties of the trusses; while the upper joints are rigid, methods of analysis are usually based on the assumption that the moment of inertia of a steel truss may be taken as equivalent to that of a beam. In this paper, the author making use of the principle of least work reviews the equations for calculating the angle-changes at the ends of a truss, and then illustrates their applications with two practical examples: one with flat roof and the other with gabled-roof. They are solved respectively by the method of slopedeflection for the cases of no-sidesway, sidesway-correction and sidesway included by solving the elastic equations of unit deformation. The results are compared with those obtained with usual assumptions.

    單層廠房採用鋼架砼柱之混合結構,極為普遍,上端鉸結時柱之應力並不受桁架彈性常數之影響,上端剛結時之分析方法,對於鋼架之截面慣矩每予假定,並代之以假想變梁,本文作者用最小功能定律以求計算桁架兩端角變常數之公式;再取二實例:一平頂屋架,一脊式屋架,用角變位移法分就無側欹、侧欹校正及單位變位彈性方程解三步驟解出共結果,與一般假定方法所得相互比較。

    The so-called "truss rigid frames" are those rigid frames with trusses as their horizontal beams, of which the two ends are rigidly connected to columns. Within the author's knowledge, all the methods available at present for analyzing such rigid frames are based on Certain special assumptions such as (1) that the positions of the points of contra-flexure in all the columns are previously known; (2) that the end rotations of a truss may be reprensented by that of its assumed line of axis as in the case of an...

    The so-called "truss rigid frames" are those rigid frames with trusses as their horizontal beams, of which the two ends are rigidly connected to columns. Within the author's knowledge, all the methods available at present for analyzing such rigid frames are based on Certain special assumptions such as (1) that the positions of the points of contra-flexure in all the columns are previously known; (2) that the end rotations of a truss may be reprensented by that of its assumed line of axis as in the case of an ordinary beam; or (3) that the end verticals of trusses may be given certain prescribed deformations. Of course, the adoption of any of such assumptions leads to only approximate results inconsistent with the actual deformations of such rigid frames under any loading. Heretofore, the author did not know any correct method for analyzing such rigid frames. In this paper, the author presents two principles of the correct analysis of truss rigid frames. The first principle is that of "moment action on column" for computing the angle change constants of columns, and the second principle is that of "effect of span-change in truss" for computing the angle and span change constants of trusses.As, for computing the angle change constants of a truss, the dummy unit moment is a couple applied to its end verticals, so, for computing the angle change constants of a column, the dummy unit moment must also be a couple applied to the section of column rigidly connected to the end of a truss, in order to effect a consistent deformation at the joint of the two. This is the first principle.A truss just like a curved or gabled beam of which the effect of span-change can not be neglected, so truss rigid frames belong to the same category of what may be called "span-change" rigid frames such as rigid frames with curved or gabled beams. Therefore the span-change constants of trusses should be included besides their angle-change constants for analyzing truss rigid frames. This is the second principle.With the constants of columns and trusses are all computed in accordance with respectively the first and second principles mentioned above, truss rigid frames may be analyzed by any method including the effect of span-change as in the case of rigid frames with curved or gabled beams, and the results thus obtained will be exactly the same as by the method of least work or deflections without any special assumptions.In this paper, after the two principles are described and the formulas for computing the constants of columns and trusses are derived, the correctness of the two principles are then proved by the methods of least work, deflections and slope-deflection. A two-span truss rigid frame is analyzed under the following three conditions:Ⅰ. Applying both of the two principles to obtain the correct results.Ⅱ. Applying only the first principle to show the discrepancies of neglecting the effect of span-change in trusses as born out by comparing the results of Ⅱ with Ⅰ.Ⅲ. Applying neither of the two principles, and the truss rigid frames being analyzed by the special assumption (2) mentioned above with the line of axis at the bottom chord of truss, in order to show the discrepancies of neglecting the moment action on column as born out by comparing the results of Ⅲ with Ⅱ. For the sake of brevity, only the results are given in Tables 1 to 5 without computations in details.Although the discrepancies of neglecting the moment acticn on column are only slight as shown by comparing the results of Ⅲ with Ⅱ in Tables 2, 4 and 5, there is no reason why special assumptions should not be replaced by the correct principle of moment action on column to obtain correct results. As shown by comparing the results of Ⅱ with Ⅰ in Tables 2, 4 and 5, the discrepancies by neglecting the span change in trusses are generally considerable and, in certain particular part, as large as 3000%. Therefore, for the safe and economical design of truss rigid frames, the effect of span-change in trusses should not be neglected in their analysis.Finally, for analyzing co

    所謂“桁架剛構”即以桁架為横梁与柱相剛接之剛構。現下採用分析剛構之任一方法,以分析此項剛構时,均須採用種種特殊之假定而得近似之結果。據著者所知,中外書刊中似尚无此項剛構之正確分析法。於本文中,著者發表关於桁架剛構正確分析之兩項原理,即柱頂力矩作用与桁架跨变影響之兩项原理。前項原理使柱頂段之角夔与桁架端豎桿相同,以符合柱与桁架剛接处之連续性。後項原理指出桁架与曲梁(即拱)及折梁(即山墙式梁)相同係一種“跨变横梁”,故桁架刚構亦与拱式及山墙式剛構相同,係一種“跨变剛構”。若根據此兩项原理,分别计算柱与桁架兩端的撓曲常数,再用分析跨变刚構之任一分析法以分析此項刚構,則所得之枯果,与不作任何特殊假定用最少功法或变位法所得者完全相同。本文先說明此兩项原理及根據此兩項原理计算柱与桁架撓曲常數之方法。次取一最簡單之桁架刚構为例,證明此丙項原理之正確性。桁架刚構既与拱式及山墙式刚構同属於跨变刚構一類型,分析後者之任何方法均可用以分析前者,本文无須贅述。但取一兩跨之桁架刚構為例,列举所得之正確結果,与用近似法所得者相比较,藉以顯出近似法有相當巨大之差誤。關於階形之複式桁架刚構之分析,本文用“代替桁架”之辦法,但只說...

    所謂“桁架剛構”即以桁架為横梁与柱相剛接之剛構。現下採用分析剛構之任一方法,以分析此項剛構时,均須採用種種特殊之假定而得近似之結果。據著者所知,中外書刊中似尚无此項剛構之正確分析法。於本文中,著者發表关於桁架剛構正確分析之兩項原理,即柱頂力矩作用与桁架跨变影響之兩项原理。前項原理使柱頂段之角夔与桁架端豎桿相同,以符合柱与桁架剛接处之連续性。後項原理指出桁架与曲梁(即拱)及折梁(即山墙式梁)相同係一種“跨变横梁”,故桁架刚構亦与拱式及山墙式剛構相同,係一種“跨变剛構”。若根據此兩项原理,分别计算柱与桁架兩端的撓曲常数,再用分析跨变刚構之任一分析法以分析此項刚構,則所得之枯果,与不作任何特殊假定用最少功法或变位法所得者完全相同。本文先說明此兩项原理及根據此兩項原理计算柱与桁架撓曲常數之方法。次取一最簡單之桁架刚構为例,證明此丙項原理之正確性。桁架刚構既与拱式及山墙式刚構同属於跨变刚構一類型,分析後者之任何方法均可用以分析前者,本文无須贅述。但取一兩跨之桁架刚構為例,列举所得之正確結果,与用近似法所得者相比较,藉以顯出近似法有相當巨大之差誤。關於階形之複式桁架刚構之分析,本文用“代替桁架”之辦法,但只說明其原則,不列出公式及算例。

    In this paper a method for computing the influence lines in open rigid frames is presented. This method is based on the Müller-Breslau's principle that every deflection diagram is an influence line. If any section of a given rigid frame, at which the influence llne of any stress function——such as reaction, shear, bending moment and torsion——is desired, is allowed to produce freely a corresponding unit deformation, the deflection diagram of this frame will be the same as the influence of that stress function.The...

    In this paper a method for computing the influence lines in open rigid frames is presented. This method is based on the Müller-Breslau's principle that every deflection diagram is an influence line. If any section of a given rigid frame, at which the influence llne of any stress function——such as reaction, shear, bending moment and torsion——is desired, is allowed to produce freely a corresponding unit deformation, the deflection diagram of this frame will be the same as the influence of that stress function.The fundamental idea of this method is that the angle-changes at ends of bars due to unit deformation can be determined by propagating joint rotations and that the resulting deflection diagram which is the same as the influence line of the corresponding stress function may be determined by method of conjugate beam.Typical numerical examples are worked out to show the application of this method.

    本文提供一種求敞口剛架影響線的方法。依據米勒白斯老(Müller-Bres1au)氏“變位線即影響線”的原理,令剛架中某點有與其應力函數相应的單位形变,則剛架因此所產生的變位曲線即為該應力函數的影響線。本文所叙述的方法,係利用角變傳播原理,求出各桿兩端由於上项單位形變所引起的角变,再根據此項角變求出各桿的變位曲線,亦即該應力函數的影響線。举有實例以示此法之應用。

     
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