軸開裂的 的英文怎麼說
中文拼音 [zhóukāiliède]
軸開裂的
英文
septifragal-
Research about ctod and its components 8 ", " shows that the direction angle of ctod vector is identical with the fracture angle of void - mode fracture, which is obtained through experiments, and it is also identical with the result got by peak value line of stress triaxiality. besides, 8 i " was compare with vgc as criterion for initiation of void - mode fracture
對裂紋尖端張開位移ctod及其張開型分量~ 1和剪切型分量~ 11的分析表明,在試件發生韌窩型斷裂時,按照圓弧裂紋中ctod矢量的垂直方向預測的斷裂角與試驗測得的斷裂角符合較好,與三軸度脊線預計的結果也比較一致。The triaxial shear test of the original loess is carried out and the ct scanning is ongoing at the same time. combining images and data of the ct scanning with the stress - strain curve, the course of soften dehiscence damage and harden yield damage is explained by means of damage theory
進行了原狀黃土的三軸剪切試驗過程中的ct掃描,結合ct圖像、數據與應力應變曲線,利用損傷理論方法解釋了軟化開裂破壞和硬化屈服破壞過程。Here s a rahm, he said, at last, flinging back a cranky board on hinges
「這兒有間屋子, 」終于,他突然擰著門軸推開一扇有裂縫的木板門。Long parts, ( such as axis, pole and so on ) varying along the profiled bar direction by the length or by a certain rule can be shortened to represent, and the broken part shall be represented by waved line or zipped lines, as shown in fig. 13
較長的機件(軸、桿、型材等)沿長度方向的形狀相同或按一定規律變化時,可斷開后縮短繪制,斷開后的結構應按實際長度標注尺寸;斷裂邊界可用波浪線、雙折線繪制,如圖13所示。After reading a large amount of domestic and international about shaft research materials, the thesis combines the concrete experimental condition of the laboratory, and the crankshaft crack modal parameter characteristic go on the theoretical research at different depth different position to smoothshaft, experimental study, test data processing, diagnose system developing work ect
本論文在閱讀了大量國內外關于軸裂紋檢測的研究資料后,結合實驗室的具體試驗條件,對光軸和曲軸裂紋在不同深度不同位置時模態參數特性進行理論研究、試驗研究、試驗數據處理、診斷系統開發等工作。A open - close mathematic model is introduced into calculation of torsional vibration. results show : kurtosisness and high harmonic will increase when crankshaft have crack. 5. cylinder score is also diagnosed by torsional vibration in this paper, when cylinder score occurring, the friction of piston will decrease the action of air pressure
本文借鑒了裂紋轉子剛度的開閉模型,首次對含有變剛度單元的柴油機動力裝置進行了扭振計算,結果表明柴油機曲軸有裂紋后,扭振的角位移和附加振動力矩的高諧次分量會增加,峭度值增加。A way to avoiding crack or reducing crack width of concrete or reducing distortion of member is using prestressed concrete. the writer tried to make full use of the merit of the prestressed concrete and designed prestressed concrete mandril to control crack of structure. the prestressed concrete mandril, which was firstly applied high pressure on a small concrete bar, and then was made in concrete, so it would act as reinforced bar and resist load. in this thesis the writer designed 24 mmnbers and had experimental study of them, reached the conclusion that the effect of resisting crack of the prestressed concrete mandril was good when the load was not large, it can enhance the capacity of resisting crack and reduce the crack distance and crack width, but when the loads was large, the effect of resisting crack was not good, when we used the prestressed concrete mandril and reinforced bar together in member, the effect of resisting crack was very good. the writer analysed the adherence mechanism and wreck mechanism of the prestressed concrete mandril in anxial tension members, and according to the character of the prestressed concrete mandril, the writer constructed the bond model of it. then the writer introduced the analysis theory of crack including the bond - slip theory, the non - slip theory, the synthesis theory and mathematics stat method. the different theory had different theory base, they considered that the primary affection of crack width was different. in this test, the crack distance and crack width of members which placed reinforced bar were match to the compute value of the code gb 50010 - 2002 very well. to the members which
本文共進行了24根試件的試驗研究,得出了預應力混凝土芯棒能較大地提高構件抗裂承載力,在荷載小於預應力混凝土芯棒的開裂荷載時有較好的抗裂效果,能較大地減小裂縫間距和裂縫寬度,但是當荷載較大預應力混凝土芯棒開裂時預應力混凝土芯棒的抗裂效果不是很好,若將普通鋼筋和預應力混凝土芯棒一起使用時則有很好的抗裂效果。本文分析了預應力混凝土芯棒在軸拉試件中的粘結機理和破壞機理,根據預應力混凝土芯棒本身的特點,提出了預應力混凝土芯棒與后澆混凝土之間的粘結模型。然後本文詳細介紹了經典的裂縫分析理論粘結滑移理論、無滑移理論、綜合理論和數理統計方法,各理論有著各自不同的理論基礎,認為影響裂縫寬度的主要影響因素也各不相同。Fatigue experiments were performed to obtain the fatigue lifetime under the different loading. the parameters for law of the fatigue crack growth were obtained by crack growth experiments. in order to study the fatigue characteristics at high temperature, creep tests were also done
本文對多種典型焊接試件開展了諸多的試驗研究工作:進行單軸靜載拉伸試驗以確定構件的強度;進行疲勞壽命試驗以測得疲勞壽命曲線;進行疲勞裂紋擴展試驗以獲得試件的疲勞裂紋擴展規律paris公式;進行蠕變試驗以考察焊接試件疲勞持久特性;進行剩餘壽命試驗以獲得試件的剩餘壽命。With the help of this program, this paper does research on the moved backwards of the slide surface, lengthening the anchor section, the soil nail ' s total force, gets conclusion about relations between the soil nail ' s length and the slope ' s grade, height, soil ' s mechanical parameter ; relations between soil nail ' s total force and coulomb soil pressure. with the help of the large multiuse finite element program ansys, this paper analyzes the soil nailing in one - step ' s slopes, in two - steps " slopes, puts the emphasis on the axis force ' s distributing along the soil nail at each rows, the effect of both the excavating mode and the original slope figure to the axis force of the soil nail, the one another effect between the upper - step slope and the nether - step slope in the soil nail ' s axis force, gets conclusion about the design of soil nail at the first low, different slope body is the same with different excavating mode, the original slope figure has more effect to some than others because of the slope body, the reasonably design of the step width in two - steps slopes, the two - steps excavating and retaining has more virtue than the one - step ' s. through soil pressure analysis this paper does research on the differences and the links between the coulomb soil pressure theory and the rankin ' s, the vertical pressure at the slope surface when the slope surface is inclined and the retaining wall is rough, the soil pressure ' s distributing behind the panel, gets conclusion about the effect of both the slope body inner stability and the slope surface local stability to the soil pressure
通過分析比較,論證了對數螺旋線型比圓弧形作為邊坡的假設滑裂面具有較多的工程優點,並為此編制了一個採用極限平衡法分析土釘支護的fortran語言程序,以此作工具對滑裂面的后移、土釘錨固段的超長、土釘總力的大小等方面作了研究,得出了有關土釘的長度與邊坡的坡角、坡高、土體力學參數的關系、土釘總力與庫侖土壓力間的關系等結論;採用大型通用有限元數值分析程序ansys分別對採用土釘支護的一階邊坡、二階邊坡進行分析,重點是研究各排土釘的軸力分佈規律、開挖方式及原始邊坡形態對土釘的軸力的影響、上下階邊坡在土釘軸力方面的相互作用,得出了有關第一排土釘的設計問題、不同類型的土體應適用於特定的開挖方式、原始開挖出的邊坡形態對一些類型坡體的邊坡土釘支護有較大的影響而對另外一些影響不大、二階邊坡臺階寬度的合理確定、二階開挖及支護比一階時具有較多的工程優點等結論;通過土壓力分析對朗肯、庫侖兩種經典土壓力理論的區別與聯系、坡面傾斜及墻背有摩擦時的坡面豎向應力分佈、面板背土壓力的分佈形態作了研究,得出了邊坡支擋土壓力受坡體內部穩定與坡面局部穩定兩個方面的影響、土釘支護面板背土體中卸荷拱的存在對面板受力有利等結論。The algorithm of sequencable mark and description of the object for crack automatic identification is presented by means of pre - image process. on basis of visual c + + 6. 0 developing environment, the software function of controlling of magnetic partical testing engine and the stepping - motor is realized in c + + and mfc with objected programming method. the automatic system of the camshaft of small diesel engines automatic magnetic partical testing is realized, which is the predicted goal that we would achieve
用計算機控制磁粉探傷機和步進電機的工作;解決了jpeg圖象格式在windows系統中visualc + +編程環境下的壓縮轉換、顯示和處理的問題;結合數字圖象的預處理,提出了通過圖象分析自動識別裂紋的順序目標標記與描述演算法;基於visualc + + 6 . 0開發環境,用c + +語言和mfc類庫,採用面向對象的程序設計方法,用軟體實現了對磁粉探傷機和步進電機等硬體系統的自動控制功能;實現了柴油機凸輪軸熒光磁粉探傷系統的自動化,達到了預期的目標。The developments of restraining stress, creep behavior and elastic modulus in concrete were measured under different restraint degrees by uniaxial restrained shrinkage tea, and the influence of restraint degree on evaluation of cracking sensitivity in early concrete was alto discussed
採用了單軸約束試驗方法,分析了不同約束程度下混凝土約束應力、鬆弛性質和彈性模量的發展,並討論了約束程度對早期開裂敏感性評價的影響。Early age cracking of concrete has re - emerged as an important issue all over the world in recent years. the stress, due to restrained volume change related to thermal deformation and shrinkage in the early age concrete, is the main driving force for the deleterious cracking in the construction stage. during the development of the stress, creep, a very important property of concrete, is always developing. creep contributes to 40 ? - 50 ? reduction of the elastically induced stress in the restrained specimen. ring test, a qualitative test, can provide information to assess the potential for cracking of different concrete. an overview of ring test developed in recent years and mechanism of uniaxial tensile creep test is described in this paper at first. then, an innovative test equipment based on ring test is outlined
近年來混凝土早期裂縫問題再次引起全球工程界的廣泛關注.早期混凝土由於體積變形受到約束而產生的應力是導致混凝土開裂的主要因素.在混凝土應力發展的同時,混凝土徐變也在同時發生著變化.有研究表明,徐變能減少40 ? - 50 ?的早期應力.圓環試驗是用於定性評價混凝土材料抗裂性能的試驗方法之一.本文首先分析了圓環試驗和單軸拉伸徐變試驗的原理,創造性地將圓環試驗用於測量早期混凝土的干縮徐變,並設計了試驗方案Nonlinear characteristics such as bifurcation and chaos under three kinds of models are compared. and nonlinear characteristics of coupled vibrations under the model supporting with bearings are analyzed detailedly. the acquired torsion properties and nonlinear characteristics of cracked rotor have good assistant effect on diagnosing cracked fault
以重力占優的開閉裂紋模型為研究對象,研究了裂紋轉子升速過程的彎扭耦合振動瞬態響應特性及影響因素,探討了1 3階及1 2階亞諧共振特徵;在考慮轉速渦動情況下,比較了三種模型的分叉與混沌等非線性特性,並詳細分析了軸承支承模型的彎扭耦合振動非線性特性。Four arrays of apparent resistivity are arranged at this measuring surface of granite sample symmetrically with symmetrical four - electrode method, and at an angle of 45 between any two adjacent arrays. the elastic constraint is exerted on 4 surfaces for parallel to the longest dimension of the sample. the samples are compressed along the direction parallel to the longest dimension of the cubic, and the variation of apparent resistivity during the whole loading process is observed
在花崗巖標本測量面上,布設4條夾角互為45的視電阻率測線,將標本平行長軸方向的4個面加上彈性約束,沿標本長軸方向加壓,測量標本視電阻率隨軸向應力的變化,實驗結果為: 1巖石視電阻率變化形態顯上升-平穩-下降形態,但平穩段不明顯,時間很短2視電阻率開始下降時間,比其他受力方式實驗結果都早,約提前10 %破裂應力。Also the failure modes and the cracking torque, original stiffness, ultimate torsion strength and ductility are discussed in this case. the factors affected torsion bearing capacity of high - strength concrete frame column is analyzed too. the seismic performances of normal - strength and high - strength concrete frame column subjected to biaxial eccentric compression, shear and reversed torque are studied
以軸壓比和相對偏心距為主要研究參數,揭示高強鋼筋混凝土構件在單向、雙向偏壓剪單調、反復扭矩作用下的破壞特徵、開裂扭矩、剛度、強度、延性等特性,分析了影響高強混凝土框架柱抗扭承載力的因素。By tests of 9 specimens subjected to biaxial eccentric compression, shear and reversed torque, the failure modes and the varying laws of cracking torque, original stiffness, ultimate torsion strength and ductility are discussed, with the change of axial stress level and relative eccentricity. then, the cracking bearing capacity, the ultimate capacity and the deformability of the specimens are obtained
通過9根承受雙向偏壓、彎、剪構件在反復扭矩作用下的試驗研究,以軸壓比和相對偏心距為主要研究參數,揭示鋼筋混凝土構件中雙向偏壓剪反復扭矩作用下的破壞特徵、開裂扭矩、剛度、強度、延性等特性和耗能性能,從而確定其開裂承載能力和極限承載能力及變形性能。The mechanism of physical damage of carbon fibers was clarified firstly. the precursor which attached on carbon fibers changes to inorganic ceramic under high temperature with large volume shrinkage which appearing at cracks with fiber traction and the cracks are mainly vertical to fiber axis. because of mismatched coefficients of thermal expansion, carbon fibers suffer multiple thermal stresses and are damaged
首次探明了碳纖維熱應力物理損傷機制,即碳纖維表面附著的先驅體在高溫下無機化形成陶瓷體,同時伴隨著大的體積收縮,在碳纖維的牽引下,基體的體積收縮以開裂形式出現,裂紋的取向以垂直於纖維軸向為主,由於碳纖維與基體熱膨脹系數失配,致使碳纖維在降溫過程中受到復雜熱應力,引起碳纖維損傷。The experimental results are the following : 1 the resistivity changing features of rock show rise - smooth - drop, and the smooth segment is very short and unobvious. 2 the time of first drop for the apparent resistivity is earlier than all other loading experimental results, the rupture stress about moves up by 10 per cent. viz : the apparent resistivity starting drop when axial rupture stress increases about 40 per cent for the array parallel to the axial ; the apparent resistivity starting drop when axial rupture stress reaches about one - third for the arrays non - parallel to the axial
即:平行於軸壓方向的測道,在軸向破裂應力的40 %左右開始下降不平行軸壓方向的測道,視電現率約在1 3軸向破裂應力開始下降3電阻率從開始下降起,下降速率逐漸增加,但增加得很緩慢,巖石大破裂前,單位軸向應力變化引起的視電阻率變化幅度也不是很大。Stiffness will decrease because of crack. the stiffness of crankshaft is changing due to open - close of crack under alternating load of crankshaft
裂紋導致曲軸的扭轉剛度下降,裂紋的張開和閉合導致扭轉剛度在一個工作循環中是變化的。3 ) based on the bond stress distribution function at the concrete - steel interface, a stress - strain relationship for cracked reinforced concrete tensile members is derived, and thereby an analytical model is proposed. by introducing a crack strength expression, the influence of non - uniform distribution of concrete stress in transverse and longitudinal directions in a reinforced concrete tensile member on concrete cracking is taken into account
3 )基於鋼筋混凝土間的粘結應力分佈函數,推導了開裂后的鋼筋混凝土軸拉構件的應力應變關系,建立了開裂分析模型,並通過引入鋼筋混凝土構件開裂強度表達式,考慮了混凝土應力在構件縱、橫兩個方向不均勻分佈對鋼筋混凝土構件開裂的影響。分享友人