有限片體法 的英文怎麼說
中文拼音 [yǒuxiànpiāntǐfǎ]
有限片體法
英文
finite strip method- 有 : 有副詞[書面語] (表示整數之外再加零數): 30 有 5 thirty-five; 10 有 5年 fifteen years
- 限 : Ⅰ名詞(指定的范圍; 限度) limit; bounds Ⅱ動詞(指定范圍, 不許超過) set a limit; limit; restrict
- 片 : 片構詞成分。
- 體 : 體構詞成分。
- 法 : Ⅰ名詞1 (由國家制定或認可的行為規則的總稱) law 2 (方法; 方式) way; method; mode; means 3 (標...
- 有限 : limited; restricted; finite; a little; not much
- 片體 : demibody
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In this paper, the membrane and protector stresses of the laminated membrane coupling, the modal of the laminated membrane coupling, the stress character of the rabbet have been studied by ansys based on the nonlinear finite element method. the work of this paper makes a theoretical basis for the using of the coupling. it has several parts to follow
本文運用非線性有限元分析方法,利用有限元分析軟體ansys研究了某型疊片聯軸器的疊片及護板的應力分佈、疊片聯軸器的模態以及疊片聯軸器榫頭的應力特徵,為該型聯軸器的使用提供了良好的理論基礎。Presents the model proposed for analyzing the vibration characteristics of shrouded blades and their calculation method by employing a wave propagation theory and modal synthesis technology coupled with a finite element method from the view point it is possible not only to conduct frequency modulation of the shrouded blades of a gas turbine, but also to utilize the friction effects between them to dissipate energy, thereby attaining the aim of vibration alleviation, as shrouded blades have been widely used in the design of high - speed turbomachinery, such as modern gas turbines and steam turbines, and with the shrouded blades forming an integral whole in a centrifugal force field, the vibration characteristics of the whole ring of blades are different from those of a single isolated blade, and this makes it essential to take into account the integral effect of blade shrouds, concludes from the calculation examples and engineering application that the above approach is valid and correct along with the possibility of considerably reducing the scale of calculation and analysis, and points out it is necessary to take into consideration the coupled effect of the whole ring of blades while the dynamic characteristics of shrouded blades is being analysed
帶冠葉片不但能調頻,還可以利用葉冠之間的摩擦效應來耗散能量,達到減振的目的.帶冠葉片在離心力場中形成一整體,其整圈葉片振動特性不同於單個孤立葉片,需考慮葉冠的整體效應.利用帶冠葉片系統的循環對稱性,提出了採用波傳播理論和模態綜合技術,結合有限元方法研究燃氣輪機帶冠葉片振動特性的分析模型和計算方法.算例和工程應用證明了該方法是效性的、正確的,並可以大大降低計算分析規模.研究表明帶冠葉片動力特性分析時必須考慮整圈葉片的耦合效應If we can accurately ensure the rigidity coefficient, the result of mathematic analysis method can approach the fact accurately by applying contact mechanics theory, we can deal with the lining and lining as contact problem of two bodies. using pretension bolted solid finite element simulate bolt at linings. thus not only considers perpendicular rigidity but also considers the tangent contact rigidity
( 4 )通過運用接觸力學的理論,將管片與管片的接頭抽象成為兩個體與體的接觸問題,在管片處的螺栓採用有限元中的實體螺栓預緊單元進行模擬,這樣不但考慮了管片與管片處的法向剛度接觸而且考慮了管片與管片間的切向接觸剛度。This technique combines the edge - based finite - element method with physical optics ( po ) and physical theory of diffraction ( ptd ). the hybrid technique is applied to compute the scattering fields from the electrically large bodies with cracks and cavities on their surfaces. it is also used to analyze the scattering characteristics of microstrip antennas residing in a cavity mounted on metal objects with finite sizes
本文採用edge - basedfem為基本方法,結合物理光學法( po ) 、物理繞射理論( ptd ) 、邊界積分方程( bi ) 、區域分解技術( ddm )和完全匹配層( pml )吸收邊界條件等求解方法構成的混合方法,對電磁散射和輻射問題進行了研究,主要包括以下內容:提出了一種edge - basedfem與物理光學方法和物理繞射理論相結合的混合方法? fem po - ptd方法,並將該混合方法應用於帶有腔體或槽縫的電大尺寸導體目標的電磁散射特性分析和位於有限導體目標上的背腔式微帶貼片天線的電磁散射特性分析。This thesis built the model of micropump, the deformation of the micropump membrane and the volume change of the micropump chamber under piezoelectric - drive were simulated by finite element method ( fem ). the effects of the membrane thickness, shape and piezoelectric voltage on the volume change of membrane were analyzed. the relation between intrinsic frequency and membrane thickness was also discussed
建立了微泵膜片的有限元模型,採用直接耦合法模擬分析了微泵膜片在壓電驅動下產生的形變和由此引起的微泵腔體體積的變化,得出了膜片厚度、形狀、和壓電驅動電壓對微泵腔體體積變化的影響。The flow equations are solved using finite difference technique. using body - fitted curvilinear coordinate system treated the boundary conditions. by iteratively solving the flow governing equation and the blade equation, the design of axial flow pump impeller in the quasi - three - dimensional rotational flow can be performed according to the angular momentum distribution, the blade which was designed in the lifting method, flow channel and the blade thickness given
其次在流動無粘性、不可壓及考慮葉片厚度的條件下,依據葉輪內的流動特性,推導了葉輪內三維流動周向平均流動控制方程以及葉片方程;在貼體坐標系中,採用有限差分法求解流動方程和葉片方程;在採用升力法設計出的葉片作為初始葉片、給定葉片速度矩分佈、葉片厚度分佈和葉輪軸面流道幾何形狀條件下,迭代求解流動控制方程及葉片方程,實現了軸流泵葉輪的準三維方法設計。At the same time in this paper we analyze nonlinear behavior of masonry through finite element method program and obtain its load when the wall start to crack and when it destroy, the p - u curve and so on. a comparison has been made between the data obtained from the experiment and the calculated through finite element method program so that we can study the cause of crack. in this paper we use finite element method to study concrete ' s character to analyze masonry, satisfactory results have been attained
因此本文在對灰砂磚砌體進行力學性能試驗的基礎上,分析其裂縫產生的破壞模式與開裂機理,並論述了將斷裂力學知識運用於研究砌體裂縫問題的可行性;同時,本文運用有限元方法對結構低周反復加載靜力試驗所做的灰砂磚墻片進行非線性分析計算,得出墻片的開裂荷載、極限荷載、 p ? u曲線,裂縫在墻體上的分佈等,與試驗所得數據對比,以便於研究裂縫的開裂機理,並將研究混凝土的有限元方法運用到對砌體的研究中,取得了較滿意的結果,為類似的試驗分析提供了一條新的思路。As the deformation caused by centrifugal force is beyond the small deformation range, the large deformation effect was also taken into account in the equation. two models are constructed, one is of shrouded blade and the other is of bladed disc. the static natural frequencies and dynamic frequencies ( under 3000rpm ) are calculated by the finite element method and cyclic symmetry technique
針對葉片的結構特點,採用適應較強的三維八節點實體單元模擬葉片,建立葉片運動微分方程;葉片?輪盤系統在高速旋轉時,受到離心力作用,使葉片發生大變形,故在方程中考慮了幾何大變形的問題;為研究葉根輪緣之間的接觸狀態,建立了考慮葉根?輪緣接觸的有限元方程,利用拉格朗日增廣演算法來求解該方程,確定葉根輪緣之間的接觸面狀態。To study the acoustic unsteady combustion of srm, built the acoustic model of chamber. deduced the little amplitude sound wave 3d equation, used the finite volume discrete method to simulate. got the vibration model of three kinds of chamber
為研究固體火箭發動機聲不穩定燃燒特性,建立了燃燒室內聲學特性分析的物理數學模型,推導了小振幅聲波三維波動方程,採用有限體積離散方法進行模擬,得到圓柱型、四片翼柱彤和五片翼柱型藥柱三種燃燒室形狀聲學振動基本模態These methods are following : ( 1 ) in order to build fem model conveniently and enhance calculating speed, interceped a finite length and built a 2d - symmetry model. ( 2 ) in order to apply loads conveniently, kept the entrance of cold fluid. ( 3 ) in order to obtain numerical results in steady situation, lengthened export and import ends
這些方法主要有: ( 1 )為了便於建立模型並提高計算速度,對于實際工程中採用的長徑比特別大的換熱管採取截取有限長度的方法並建立二維對稱簡化模型; ( 2 )提出採取保留冷流體入口端,截取有限長度的方法施加載荷; ( 3 )適當延長翅片管的出口端和入口端,以便獲得穩定工況的數值解。In this study, the design procedures for mitigating radiation effects mechanisms have been implemented in a gate array design, we have obtained samples of integrated circuits test structures manufactured by wuxi csmc - hj using their 0. 6 - m cmos process
在研究中,我們將降低輻射效應的設計方法應用到門陣列設計中,獲得了華晶上華半導體有限公司採用0 . 6 m的cmos工藝生產的集成電路樣片,具有100krad ( si )的抗總劑量輻射能力。Article 7 of the joint unit of exposure, the legal representative is at fault and who are directly responsible for the exposure was also at the same time, their photos and personal identification numbers from " ice8000 ? international credit supervision system state secrets, commercial secrets, personal privacy protection rules, " and will be external exposure, dishonest people to social awareness and avoid being taken
第七條對單位聯合曝光的,法定代表人與有過錯的直接責任人也同時被聯合曝光,其照片和個人身份證號碼不受《 ice8000 ?國際信用監督體系國家秘密、商業秘密、個人隱私保護規則》的限制,將一併對外曝光,以便社會認識失信人,防止上當受騙。General seminconductor, inc. is a market leader in the discrete segment of the semiconductor industry with manufacturing facilities in china, france, germany, united states, etc. the company provides customers with a broad array of power rectifiers, transient voltage suppressors and small signal transistors and diodes
通用半導體有限公司是世界上半導體切片工業的領導者,它的製造廠遍及中國、法國、德國、美國等國家。公司提供多種多樣的整流器、瞬態電壓消除器、小信號晶體管以及二極體。Methods : according to x - rays of genu varum and genu valgum and cross - section ct of normal knee joint, 31 planar - models and 31 working conditions in three - dimensional finite element were established with the software of super - sap every 2 degree from genu varum 30 degree to genu valgum 30 degree, then calculated the stress and stain state of every node with the size and direction of actual stress
方法:有限元模型的建立是利用膝關節內、外翻x線平片和正常人膝關節橫斷ct片,並用super - sap軟體分別建立平面和三維有限元模型,在內翻30至外翻30之間,每2按實際受力大小和方向加載,分別生成31個模型和31種工況,計算得出模型中各節點的應力應變情況。In this paper the turbine blade is described by the method of csg and b _ rep mixed. each part of turbine blade has been divided into the meshes with the parameter mapping method. then the process of integrating the sub - block into a whole object is completed with the method of integer coordinate
本文採用csg與b _ rep混合描述法描述汽輪機葉片的結構,利用參數映射法對汽輪機葉片的每個子塊進行網格剖分,然後利用整數坐標實現子塊網格集合成整體有限元網格模型。This feature reflects the physical phenomenon of breaking of waves and development of shock waves. in the fields of fulid dynamics, ( 0. 2. 1 ) is an approximation of small visvosity phenomenon. if viscosity ( or the diffusion term, two derivatives ) are added to ( 0. 2. 1 ), it can be researched in the classical way which say that the solutions become very smooth immediately even for coarse inital data because of the diffusion of viscosity. a natural idea ( method of regularity ) is obtained as follows : solutions of the viscous convection - diffusion pr oblem approachs to the solutions of ( 0. 2. 1 ) when the viscosity goes to zeros. another method is numerical method such as difference methods, finite element method, spectrum method or finite volume method etc. numerical solutions which is constructed from the numerical scheme approximate to the solutions of the hyperbolic con - ervation laws ( 0. 2. 1 ) as the discretation parameter goes to zero. the aim of these two methods is to construct approximate solutions and then to conside the stability of approximate so - lutions ( i, e. the upper bound of approximate solutions in the suitable norms, especally for that independent of the approximate parameters ). using the compactness framework ( such as bv compactness, l1 compactness and compensated compactness etc ) and the fact that the truncation is small, the approximate function consquence approch to a function which is exactly the solutions of ( 0. 2. 1 ) in some sense of definiton
當考慮粘性后,即在數學上反映為( 0 . 1 . 1 )中多了擴散項(二階導數項) ,即使很粗糙的初始數據,解在瞬間內變的很光滑,這由於流體的粘性擴散引起,這種對流-擴散問題可用古典的微分方程來研究。自然的想法就是當粘性趨于零時,帶粘性的對流-擴散問題的解在某意義下趨于無粘性問題( 0 . 1 . 1 )的解,這就是正則化方法。另一辦法從離散(數值)角度上研究僅有對流項的守恆律( 0 . 1 . 1 ) ,如構造它的差分格式,甚至更一般的有限體積格式,有限元及譜方法等,從這些格式構造近似解(常表現為分片多項式)來逼近原守恆律的解。A sensing magnetic field and displacement type of giant magneostrictive microdisplacement actuator with the functional of sensing driving magnetic field and microdisplacement is developed, and the design theories and approaches being applicable this type of microdisplacement actuator are pointed out : a circular diaphragm type of flexible construction that acts as integration mechanism of microdisplacement transferring and sensing of giant magnetostrictive microdisplacement actuator is adopted, sheet flexure theory of elasticity mechanics and approach of finite element are applied to design and calculate it, corresponding deflection and analytic formula and distribution curve of stress are given, and the specific achieving approaches of measuring principle and magnetic field sensing function of driving field in giant magnetostricitive rod are pointed out the magnetic field sensing function of the actuator is used to practically measure driving magnetic field of actuator and to obtain the relationship of driving magnetic field and coil current, which is also analyzed and studied
其中,採用圓形膜片式柔性結構作為超磁致伸縮微位移執行器的微位移傳遞、感知一體化機構,應用彈性力學中的薄板彎曲理論、有限元方法對其進行了設計、計算,並給出了相應的撓度和應力解析式及分佈曲線;應用電磁理論給出了超磁致伸縮棒內驅動磁場的測量原理及磁場感知功能的具體實現方法,並利用執行器的磁場感知功能對其驅動磁場進行了實際測量,得出了驅動磁場與線圈電流之間的關系,並對其進行了分析和研究;對執行器內部的電磁路和偏置磁路結構進行了設計計算與實驗研究,為了減小驅動線圈的發熱,對其形狀進行了優化設計。( 3 ) the effects of the bearing parameters on the bearing performance have been numerically analyzed using finite element method. a finite element formulation has been developed. the numerical analysis of finite element has been realized with matlab language
( 3 )用有限元法數值分析了懸臂型彈性箔片徑向動壓氣體軸承的結構參數和運轉參數對軸承靜動態性能和穩定性的影響。By the methods of conformal mapping, the closed - form analytical expressions for characteristic impedance per unit length and relative effective dielectric permittivity are deduced for the three asymmetric cpw ' s, and the analytical expressions of the electric field for asymmetric cpw with conductor backing is derived
根據本文所提出的模型,推導出了三種結構參數的具體特例,並給出了這些特例的特性阻抗、有效介電常數解析表達式。門)給出了分析有限介質基片厚度非對稱共面波導導體損耗的方法,並推導出其解析表達式。The summary in the field of the research of the bird impact on engine blades and the basic contact caculation methods. according to these basic theories and methods, many numerical simulation of bird impact on flat blades are completed by ansys ls - dyna
本文介紹了鳥撞擊響應研究的基本理論與接觸計算方法,按照求解接觸沖擊問題的基本理論和方法,針對平板葉片的鳥撞擊問題,利用有限元分析軟體ansys ls - dyna進行大量的數值模擬計算。分享友人