fem system 中文意思是什麼

fem system 解釋
頻率域電磁測深系統
  • fem : n. 〈美俚〉女子。adj. 〈美俚〉女性化的，女人似的。Lib, Femlib 〈美國〉婦解，婦女解放運動。
  • system : n 1 體系，系統；分類法；組織；設備，裝置。2 方式；方法；作業方法。3 制度；主義。4 次序，規律。5 ...
  1. This research work on bird striking has a long history and already got plentiful achievemellts in theories and experiments, howevef, still a long way no doubt waits to go for sophisticated research work on it more detailed to apply to airframe engineering quantitatively in combination wth the technical reformation of the birdstrike experimelltal system in our laboratory, this thesis deeply studies and analyses the numerica1 computation and simulation methods to birdstrike dynamic response problem based on finite - elemefit - method ( fem ) numerical emulation and modem large - scale scientfic computation software

    本文結合我公司鳥撞實驗體系技術改造項目，應用有限元數值計算模擬技術及現代大型科學計算工具，對鳥體撞擊飛機風擋結構的動力學響應問題進行了系統學習與研究探討，初步掌握了科學計算方法，獲得了計算模擬的實踐經驗，為今後深入應用大型科學計算手段進行撞擊類科學問題的研究以及深入應用於工程實踐奠定了強有力的工作基礎。
  2. Pole system fem analysis of double spring model

    雙彈簧地基模型的桿系有限元分析
  3. For jiangpinghe double - curved arch dam, 3 - d elasto - plastic fem is made, in which the point safety factors of the dam - abutments system and the safety margin for coefficients of sliding resistance on 7 potential sliding blocks of the dam before and after the reinforcement of the dam are calculated under the conditions of the normal storage level and the design flood level respectively based on the results from the analysis made with fem

    摘要對江坪河雙曲拱壩進行了三維彈塑性有限元分析，利用有限元應力成果分別計算了正常蓄水位、設計洪水位等3種工況下加固前後壩體壩肩系統的點安全系數和7個可能滑動塊體的抗滑富餘系數。
  4. To solve these problems, a fem preprocessing system in materials joining process has been developed in this dissertation. based on this system, a welding numerical model of a missile ’ s oil box has been established and the structure ’ s distortion rules after welding have been analyzed

    本文針對這一現狀開發了一個專門針對焊接過程數值模擬的有限元前處理系統，並應用該系統建立了某型號導彈油箱結構的焊接有限元模型，分析了該結構的焊后變形規律。
  5. As an application of this fem preprocessing system, the simulation on the welding process of missile ’ s oil box was performed, in which the effects of the welding sequences of four web plates and welds on each web plate are primarily analyzed. the simulation results show that the deformations under varied welding sequences are almost the same. downward deflection deformation is obtained along the weld longitudinal direction in the structure as well as upward deflection deformation along the weld traverse direction

    對于某型號導彈油箱結構焊接過程的數值模擬計算，主要考察了每塊立板上各段焊縫焊接順序的調整、四塊立板之間不同的焊接順序以及焊接起始端的選擇對結構焊后變形的影響規律，模擬結果表明:壁板在各種焊接順序下的整體變形規律基本相似，即焊後壁板沿焊縫縱向發生了向下的撓曲變形，中部向下變形量最大;沿焊縫橫向發生了向上的撓曲變形，壁板兩端部變形量較大，且壁板前端變形大於壁板後端。
  6. In fact there are few people are familiar with fem and in generic department usually only uses fem to analyse several aptotic problems. so when we analyse a problem only need to change the size of model and magnitude of force. we can use existing fem software and program language to build new system

    在實際的有限元軟體使用過程中，對具體行業而言，分析的問題都集中在具體的一部分問題，在對某一具體問題的分析中，需要用戶進行調整的參數往往是比較固定的，所以對具體問題的分析模塊進行參數化資源共享對實際應用中提高有限元軟體的使用效率是非常有效的。
  7. Another topic of this article is to try to find a proper overlay design method. by using elastic layer system ( els ), finite element method ( fem ), genetic arithmetic ( ga ) back calculation and efficacious thickness method, the paper puts forward four design methods. the results say that the position where the max stress appears is not the only one but varies with the thickness of overlay

    根據陜西省高速公路瀝青路面病害以及使用性能的實際情況，提出了代表彎沉值的計算方法以及下臥層模量的反演方法，在此基礎上利用彈性層狀體系理論、有限單元理論、遺傳演算法以及有效厚度法等理論對加鋪層厚度設計方法進行了研究。
  8. In this paper, finite element method ( fem ) was used to study the biomechanical responses and injury mechanism of pedestrian lower extremities in traffic accidents. the fem model was used also to predict the risk of bone fracture of the lower extremities. the results from this study can forms a background knowledge to improve the safety performance of passenger car bumper system for protection of pedestrian lower extremities in traffic collisions

    為了減少行人在碰撞事故中下肢的損傷風險，本文採用有限元分析的方法，研究了行人下肢的碰撞生物力學響應和損傷機理，並模擬分析預測了下肢的骨折風險，研究結果可為改進車輛保險杠系統的安全性能提供依據。
  9. Abstract : in this paper, a trimming method for subdivision surface is presented. it is applied well in the cad / cae system of plastic injection molding, and also useful for other designing of products and field of fem analysis. experimental results show that the method is highly automatic, quick and stable

    文摘:介紹一種基於離散曲面的裁剪演算法，該演算法適用於注塑模cad / cae或其它產品設計和有限元分析的領域，實踐證明該演算法自動化程度高、速度快、穩定可靠
  10. In this dissertation, nc tube bending process has been researched by using 3d fem numerical simulation in conjunction with theoretical analysis. based on the database technology, the nc tube bending simulation system ( nctbs ) is developed in order to make this process systematize and standardize and to control forming quality effectively. a brief introduction to the project and its results obtained are as follows : a mechanical model corresponding to reality has been established through analyzing the stress of nc tube bending process

    本文著重採用計算機數值模擬，並與理論分析相結合，對數控彎管進行了三維有限元模擬研究，同時自主開發了基於數據庫技術的數控彎管模擬系統（ nctbs ） ，初步實現了數控彎管從設計、模擬到數控生產的工藝規程系統化和規范化，對有效實現數控彎管工藝的質量控制具有重要意義。
  11. 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 。
  12. The influence of the eccentricity mass moment, position of mass center and the bearing stiffness to the vibration characteristics of the rotor system is discussed in detail ; 3. to verify the exactness of fem and learn the principle of vibration of dredge pump further, the orbit of the rotor shaft of the pump in the dredger is measured, the measurement results show : the repeat of the orbit of the rotor shaft is very bad when dredge pump is in the dredging mud condition

    模態分析確定了泥泵的振動特性（固有頻率和振型） ；諧響應分析確定了泥泵轉子軸在偏心力的作用下軸截面處的最大響應位移；研究了轉子軸的質心位置、軸承剛度和質量偏心矩對轉子軸振動特性的影響； 3 、採用軸心軌跡法，實船測量了泥泵軸工作時振動響應值。
  13. According to the special shape and operate requirements of the torpedo, the structure and moulding process of the torpedo shell are established, in which the body and overlay block with grooves are moulded by fiber winding, and close moulding respectively with the adhesive by limited stop compression. in the light of the selection of raw material system, composite system with outstanding performance are defined, based on which the mechanical properties are tested., with the overall consideration of structural characters and design demands, the main factors which may have effects on the strength and stability ( including stiffness section dimension, stiffeners space, skin thickness and skin lay angle ) is optimized one by one for the structure design parameters on the base of the fem model of skin, stiffness and layover block by fem. as a result, the prototype with 1 : 1 proportion and its structure and lay optimization design are completed. the moulding technology for polyurethane foam moulding the stiffened shell is obtai ned in terms of the design, manufacture moulding, experimental mould and tooling

    依據在研產品特殊的外型結構和使用要求，確定了該型號水雷復合材料殼體的具體結構形式和復合成型工藝路線，即由纖維纏繞工藝成型主體異形件，閉模成型帶通槽外貼塊，用限位加壓工裝實現粘接的工藝路線；通過對原材料體系的篩選，確定了綜合性能較好的復合材料體系，以此為基礎進行了力學性能測試；運用有限元方法，建立了蒙皮、筋條和外貼塊的分析模型，綜合考慮結構特點和設計要求，對影響結構強度與穩定性的主要因素（包括筋截面尺寸、筋間距、蒙皮厚度、蒙皮鋪層角度）分別進行了結構設計參數的優選，最終完成了復合材料異形耐外壓殼體1 : 1樣件和縮比實驗件結構及鋪層優化設計；完成了聚氨酯泡沫胎成型內置加筋殼體的成型工藝技術研究；對縮比件進行外壓性能測試，並給出了應力、應變測試結果。
  14. Works on the bending roll system of four - roll rolling mill, the workroll shape variation caused by the force of bending roll and the contact stress between rolls was researched with the fem software ansys, the maximum deformation of the work roll was calculated, and the curve of the gap adopting the least - squares method was fitted, which set the base of the further calculation of load - gap shape

    摘要以四輥軋機的彎輥系統為研究對象，利用有限元分析軟體ansys研究彎輥力和輥間接觸應力引起工作輥形狀的變化，計算工作輥彎曲的最大變形量，並用最小二乘法對輥縫曲線進行擬合，為進一步計算有載輥縫形狀提供可靠的理論依據。
  15. The 3d model of mold is analyzed in 3d fem by using ugh. base on the analyses result, some danger structure of the model have been found and some suggestions of the mold modification are given. since doing a lot of research about the 3d cadvcae technology, a 3dcad system of selecting mold for aluminum material have been developed and the method of analyzing the 3d model is provided in this paper

    然後，為了能真實地模擬實際生產過程，進行鋁與模具鋼在一定表面粗糙度、不同溫度條件、不同潤滑接觸狀態下的最大靜摩擦系數實驗，總結摩擦系數隨溫度變化的規律性和取值范圍；最後，應用ug 17 . 0三維有限元cae模塊進行模具三維力場分析，根據三維有限元的結果分析，對模具危險部分進行預變形的處理和優化，改善模具受力變形的狀況。
  16. When we do so we cannot get the detail distribution of system ' s stress and we are difficult to improve the structure as our wishes. wheel / rail system analyze is a typical elasticity contact problem, so we can use fem to analyse this system effectually. in this paper we used fem contact method analysed the system from engine kinetics standpoint

    作為一種典型的接觸問題，車輪軌道系統分析同時也屬于機車動力的研究范疇，本文從機車動力學入手，對起重機車輪軌道的接觸狀態進行了動力學分析，在此基礎上利用有限元接觸問題的分析方法對起重機車輪軌道系統的接觸應力進行了不同狀態下的計算模擬。
  17. This paper introduces the basic concepts of object - oriented programming to the finite element method for linear static analysis. in the view of ooad ( object - oriented analysis and design ) method, a set of basic classes for the fem system are founded and their relationship is discussed too. all these fem classes are implemented in c + + language because the hybrid language c + + is an object - oriented extension of c. ( this language includes all the feature of c and is well suited to solve numerical problems because of its efficiency. )

    本文在靜態線性有限元系統中引入了面向對象的程序設計方法，介紹了面向對象方法的基本概念及特徵，並通過有限元的面向對象分析和設計，確定了一套基本的有限元對象類及有限元的面向對象模型，本文設計的所有類均採用c + +編程語言進行了實現，最終形成了一套fem類庫，它們以動態連接庫的形式存在。
  18. The content of ihe paper is as follows. ( 1 ) a object oriented fem system structure is designed and realized

    本文的研究內容如下：設計和實現了一個面向對象有限元體系結構。
  19. 2. this paper studies the second development technology of vba based on autocad and develops the visual fem system of the metal gate

    2 、研究了基於autocad平臺的vba二次開發技術，進行了金屬閘門可視化空間有限元分析系統的開發。
  20. Abstract : the paper analyses the characteristic of automatic fem system, presents how to affect the results of analysis to any structure with different type of elements, puts forward the cases of application for this type of system

    文摘:本文就現行的全自動建模fem系統特點進行了分析，比較了結構不同單元模型對分析結果的影響，闡述了其所適應的應用場合。
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