次元拉力 的英文怎麼說
中文拼音 [cìyuánlālì]
次元拉力
英文
dimensional stress-
In the paper, the finite element simulation software dynafrom is applied to analyze the affect of different blank holder during the forming process of laminose stepped tubular part, predict the possible defects such as wrinkle and break, obtain the rational style of blank holder avoiding the occur of defects and determine the rational configuration of die. the forming affect of thin - wall shallow stepped tubular part is analyzed when using different lubricate condition ( friction coefficient ). by this method, the relationship between friction coefficient and drawing depth of laminose stepped tubular part is obtained
本文利用有限元模擬軟體dynafrom分析了不同類型的壓邊圈對薄壁階梯筒形件成形過程的影響規律，預測了採用不同類型壓邊圈時可能出現的成形缺陷如起皺和拉裂，獲得了防止缺陷產生的合理壓邊圈形式，確定了合理的模具結構形式；分析了不同的潤滑條件（摩擦系數）對薄板階梯筒形件成形的影響，獲得摩擦系數與薄板階梯筒形件的拉深深度的關系；分析了階梯筒形件成形過程中的不同階段的應力應變分佈、毛坯材料厚度變化情況，並獲得了階梯階梯筒形件能一次拉深成形的條件。This paper focuses on the research of the stress mechanism of the ribbed shell structure in statics, dynamics and under the explosive load on the basis of the engineering practice of cave depot of single aircraft. in this paper, according to the classical shell theories, the basic differential equilibrium of the ribbed shell structure and the finite element analysis of 3d rippled plate are established, in which the function of annular ribs reinforcement bars and 3d ripped steel plates are distributed in the range of the steel, and the functions along the longitude direction of tension, bending, and torsion are neglected ; applied with dynamic analytical theory, the dynamic model of ribbed shell structure and the analytical theory model of elastic - plastic are set up ; the triangle series method is used to solve the displacement and stress under the distributed load and the concentrated load of the ribbed shell structure
本文以軍用機場地面單機掩蔽庫工程建設為工程背景，首次對內襯三維波紋鋼板混凝土拱型復合結構的受力機理進行了靜力、動力和爆炸荷載的分析研究。根據將橫肋、鋼筋及三維波紋鋼板的作用均勻分佈在殼體范圍內的情況，忽略橫肋、鋼筋及三維波紋鋼板沿殼體母線方向的抗拉、抗彎及其抗扭作用，首次推導出了內襯三維波紋鋼板混凝土殼體的微分平衡方程，建立了有限元計算模型，並採用三角函數法，求解了三維波紋鋼板混凝土拱型復合結構在分佈荷載和集中荷載作用下的位移響應和應力響應，並與普通殼體進行了比較。The static analysis of the long span plate - truss composite cable - stayed bridges. first, the cr formation on the geometric non - linear structural analysis is introduced. next, the structural discretization of cable - stayed bridge, the stiffness matrix the formation of nodal force and the simulated construction system are introduced
首先介紹了本文採用的桿系結構幾何非線性問題的分析方法? cr列式法，其次介紹了板桁結合斜拉橋的結構離散及桿單元、梁單元的剛度矩陣以及節點力的形成方法，然後介紹了斜拉橋施工模擬體系的形成。The main results and academic contributions of the dissertation can be summarized as following : 1 ) for the difficulty to obtain the accurate analytical solution of the stress constraints around 3d cracks, detailed 3d fe analyses have been conducted to study the out - of - plane constraint factor tz around a straight through - thickness crack, a quarter - elliptical corner crack and a semi - elliptical crack embedded in an isotropic elastic plate subjected to uniform remote tension loading. the distributions of tz are minutely studied in the forward section of the cracks. strong 3d zones ( tz > 0 ) along the crack front were investigated despite the far field stress - free boundary conditions
全文主要研究內容和學術貢獻如下: 1 .針對一般三維裂紋端部場應力約束準確解析的困難，對均勻拉伸載荷作用下各向同性彈性板中穿透厚度中心直裂紋、半橢圓表面裂紋和1 / 4橢圓角裂紋進行了大量詳細的全場應力三維有限元分析，首次全面分析了非穿透裂紋端部場三維影響區范圍，給出了不同形狀三維裂紋前沿離面應力約束因子tz的數值解，並結合k場平面解給出了非穿透裂紋端部應力場k - tz雙參數描述。Hieron won this race b. c. 472, while at the height of his power at syracuse. probably the ode was sung at syracuse, perhaps, as has been suggested, at a banquet
西隆在公元前472的比賽中贏得這次比賽，同時也達到他在錫拉庫扎權力的頂峰。這首頌歌也許是在錫拉庫扎吟唱，也許象曾經說的那樣是在宴會上演唱。The plane - wave analytic solution of the coupled fluid - air - solid system and the fem model of air cushion isolations are applied to study the influence of air cushion on earthquake response of dams. the calculations show that air isolation will reduce the hydrodynamic pressure significantly and restrain the dam vibrations during earthquakes. if the dam and reservoir is isolated by air cushions, it will decrease the hydrodynamic pressures by more than 90 % and the seismic stresses by 20 - 30 %
將本文首次提出的水體-氣體-結構系統的平面波作用理論解和三維有限元模型，應用於溪洛渡雙曲拱壩的抗震安全性和氣幕隔震可行性研究中，表明氣幕對高拱壩具有良好的隔震性能，可降低動水壓力90以上，壩體地震拱應力20 30 ，減震效果顯著，並使壩體的抗拉安全系數從0 . 93提高到3 . 58 。Secondly, the math model of the high - speed pm generator with a shielding is deduced. the method of how to analyze the electromagnetic field of the generator is introduced. and with the help of a kind of fem software, the parameters of a model machine are calculated and simulated, including the electromagnetic field, no - load voltage, single - side magnetic force, loaded torque and axial force
其次，對轉子帶防護罩的高速永磁發電機數學模型進行了推導，介紹了利用有限元法對電機磁場進行分析的方法，並運用有限元軟體對一臺樣機的參數進行了模擬，包括電機磁場分析、空載電壓波形、單邊磁拉力、負載轉矩以及軸向力等方面的內容。Nevertheless, i took a 3 - day vacation again to attend a las vegas forum on foreign investment in china ” ” ” ” ” ” ” ” ” ” ” ” ” ” ” ’ ’ s power industry and made many new connections ( this time, i became a forum consultant to have the us $ 1500 fee waived
無論如何，我又請了3天假參加在拉斯維加斯舉行的關于在中國投資電力業的國外投資研討會，並得到了許多新的信息（這次是作為研討會顧問出席的，因此再度免去了1500美元的會議費） 。The analysis in this paper have been verified by experiment firstly, the structure and mechanical characteristics of sliding - plug door are described in this paper. secondly, on the base of the study of the work condition and limited load, the dynamic load - time curve is created. and then the finite element model of sliding - plug door is built by using material equivalent
本文首先總結和探討了塞拉門的結構特點和力學特性；然後探討了塞拉門的極限工況，即列車交會壓力波的作用形式，建立了簡化的作用於塞拉門上的動力學載荷曲線；其次研究了復雜形狀復合材料層合板結構的建模方法，採用物理等效方式減小了計算規模，建立了復合材料門板的有限元模型，並對各種設定的載荷形式進行了數值模擬。Allergan, a biotech firm in irvine, calif., paid a settlement of $ 824, 000 in 1998 after the government accused it of making 412 shipments of botulinum toxin to customers all over the world, including some in saudi arabia, iran and lebanon
美國加州的生物技術公司艾力根， 1998年付出了82萬4000美元與政府和解，因為政府查出艾力根公司向世界各地運送肉毒桿菌毒素，共412次，收件地點包括沙烏地阿拉伯、伊朗、黎巴嫩。In order to optimize the perpetuation tensioning tonnage of prestressed pier anchor wire of goupitan arch dam, first the scheme contrast method is adopted to define the perpetuation tensioning tonnage combination of the primary and secondary anchor wire, but the optimization result is that the pull - anchor coefficient is too big ; then the body form of the pier is optimized ; finally the anchor wire perpetuation tensioning tonnage is optimized by using ansys optimization design module based on parametric fem, the optimization result is acceptable and the pull - anchor coefficient is lowered down
摘要為優化構皮灘拱壩中孔預應力閘墩錨索永存張拉噸位，首先採用方案優選的方法確定主次錨索永存張拉噸位組合，但優選結果拉錨系數偏大，再對閘墩體型進行優化，然後採用基於參數化有限元的ansys優化設計模塊對主次錨索永存張拉噸位進行優化，優化結果滿足應力控制要求，降低了拉錨系數。The last default was back in 2000, when bradford college, an old massachusetts institution, closed its doors leaving debts of almost $ 20m
上次的拖欠要追溯到2000年，布拉福特大學，麻省的一所老學校，由於無力償還大約2000萬美元的債務而關門。Aiming at main project of the xiaoxihu bridge, a low pylon cable - stayed bridge, based on the existing theory and method of the bridge construction controlling theory, using the basic function of " ansys ", farther exploitation was done on concrete elasticity and creep calculating distinguishingly, nonlinearity analysis theory was used to construct the space model, the main beam, string pylon and abutment were simulated by the beam elements which was considered the shearing effect. which is worthy of considering that using the geometric non - linear truss elements to simulate the stayed - cable, form traveler is modeled as structure elements and participate in stress analysis. four stages are used to model the construction stage, which are : ( 1 ) the erection of form traveler ; ( 2 ) placing the segmental concrete ; ( 3 ) jacking the tendons ; ( 4 ) tensioning the stay cables
針對建設中的小西湖矮塔斜拉橋的主體工程，結合已有的橋梁施工控制的理論和方法，利用大型通用計算軟體ansys的基本功能，並著重在混凝土彈性計算及徐變計算方面做了相應的二次開發，採用非線性分析理論並建立了空間結構模型、用考慮剪切作用的梁單元模擬主梁、索塔和橋墩；用可考慮幾何非線性的桁元模擬斜拉索、施工掛藍作為結構單元進行拆裝，參與受力計算，整個施工過程按施工循環周期分為若干階段，每個階段又分為四個工況，即：空掛藍就位、澆築完畢階段混凝土、張拉預應力鋼筋和張拉斜拉索。All concrete structures are exposed to volume changes caused by hydration reactions in the early age. if the volume changes are restrained, stresses is generated which will cause cracking when it overcomes the tensile strength. as the mechanical properties of early age concrete vary with time, especially the creep degree depends on the time elapsed and the time at loading, to calculate the stress of concrete structure is a complex nonlinear problem. the finite element method ( fem ) can take account of the evolution of the stiffness properties, the development of thermal strain, creep, shrinkage and so on. in this paper, a general approach for numerically simulating this type of behaviour is presented firstly. then, how to solve this problem is introduced by the general finite element software ansys using the initial stress method. finally, a detailed description of an example calculation that demonstrates the potential of the numerical simulation strategy follows
早期混凝土由於水化反應都會產生體積變化.如果體積變形受到約束就會產生應力，一旦超過混凝土的抗拉強度就會產生裂縫.由於早期混凝土的力學性能是隨時間變化的，特別是徐變，它不僅與加載時間有關而且同時隨齡期而變化，因此計算早期混凝土結構應力是較為復雜的問題.有限單元法不僅可以考慮混凝土剛度的變化，而且可以考慮溫度、徐變、收縮等因素.本文利用初應力法對通用有限元軟體ansys進行了二次開發，通過工程實例計算了高層建築地下室側墻早期混凝土應力的變化過程，並提出了相應的抗裂措施The distribution of stress and strain and the variety of blank thickness is analyzed during different forming stages of laminose stepped tubular part. the condition of one - off drawing of laminose stepped tubular part is obtained. plasticity theory and numerical simulation technology of finite element are applied synthetically to analyze the forming technological characteristic of stepped tubular part,
通過綜合應用塑性力學理論、有限元數值模擬等手段成功地分析了階梯筒形件成形工藝特點，獲得了階梯筒形拉深的合理工藝方案及階梯筒形件一次拉深成形的規律，最後通過實驗檢驗對此工藝方案及規律進行了驗證，結果表明本文所提出的工藝方案及階梯筒形件一次拉深成形規律是正確可靠的，能直接用於指導生產。Upgrades will strengthen the national power grid, part of a usd 26 million contract from elelca ( electrificacion del caroni )
本次升級將加強和改善委內瑞拉國家電力網，這是來自elelca價值2千6百萬美元合同中的一部分。In this paper, firstly according to fourier heat conduct ~ quation, the analysical solutions of the temperature field of sfrc pavement structure were obtained and the finite element solutions were soluted by means of galerkin weighed residual methoded. secondly, based on the temperature field, the analysical solutions of the temperature stress of sfrc pavement structure were dissolved with westerguard - bradbury method, and then the finite element solutions were obtained by means of the finite element method. at last, the dynamic response of sfrc pavement plant structure affected by shock load with the finite element method was studied, and the deflection and stress response under shock load was calculated
其次，根據已求得的溫度場，利用威斯特卡德-布拉德伯利法求解鋼纖維混凝土路面板結構的溫度應力的解析解，然後又利用有限單元法對由溫度變化產生的溫度應力進行求解。最後，作者利用有限單元法分析了鋼纖維混凝土路面板結構在沖擊載荷作用下的動力響應，計算了由沖擊載荷引起的撓度響應及應力響應。分享友人