非彈性形變 的英文怎麼說
中文拼音 [fēidànxìngxíngbiàn]
非彈性形變
英文
inelastic deformation-
The scielltific computational theories and methods on bird strike to the windshield of aircraft have been systematically studied and summed up in this thesis, such as fem comptltational principles and procedures to elastic dynamic problems under the conditions of small and non - linear finite deformation, 3d viscous elastic constitutive theory and incremelltal expression under the consideration of the rate effect of non - metallic materials like the aircraft windshield, and the numerical compatational principles and key constitutions for impact - contact dynamic subjects
2 、系統學習並歸納總結了鳥體撞擊風擋結構問題中的科學計算理論與計算方法。按照鳥撞問題數值計算方法逐步深入的思路,系統總結了小變形結構動力學有限元數值計算方法、有限變形的幾何非線性有限元數值計算方法、粘彈性體非線性形變的本構物理關系;對于實施復雜結構有限元動力學計算的載荷增量方法提出了對newmark差分的改進以及進行材料與幾何非線性數值計算的細致步驟。The current chinese foundation design code gbj7 - 89 use limit equilibrium theoiy with elastic soil stress distribution to give out bearing capacity design value calculating fonnula and use elastic soil model to evaluate foundation settlement. according to the above theories, code gbj7 - 89 gives the correlative terms. but these do not accord with the practical mechanism of loaded soil below the shallow foundation and the elastoplastic property of natural soil so defects exist
我國現行規范gbj7 - 89將這兩者分開考慮,其計算地基承載力設計值的公式是根據彈性地基中應力分佈及土的極限平衡狀態理論為依據而得出的,求地基的沉降變形時則視土體為彈性,這些理論對地基及土的假設與淺基礎地基的實際工作狀態及天然土體的非線性、彈塑性存在一定的偏差。And the rock mass as the main object of most engineering practice is developed by all kinds of geotechnical action and force in the long geology history to the complex characteristic of continuous medium, crannied medium and granular medium, to the anisotropic and heterogeneous entity with elasticity, plasticity, viscidity, creepocity and rheology
作為主要工程對象的巖體是在漫長的地質歷史發展過程中經受各種地質營力作用而形成的成因和構造復雜,巖性多樣且包含了連續介質,裂隙介質和散體介質特徵的,兼有彈性、塑性、粘性、流變性的各向異性的非均質地質體。Elastic deformation is nonpermanent, which means that when the applied load is released, the piece returns to its original shape
彈性形變是非永久性的,即撤去加載后,樣品可恢復初始的形狀。For obtaining the numeral solutions of round elastic plates in axisymmetrical deformation with varying - thickness in nonlinear deformation in the unsteady electromagnetic field and mechanical field, by establishing the equations of motion, the equations of distortion, the equations of lorentz force, the equations of electronic dynamic mechenical, and adopting iterative method, we gained the nonlinear magneto - elastic calculation method and outcome of current - carrying shell, and gained the influencing degree toward mechanical parameter of varying thickness round ferreous plates in the electromagnetic field and mechanical field
摘要為了獲得內邊界固定的環形導電薄板在均布力與橫向磁場作用下的變形問題的數值解,通過建立運動方程、變形方程、電動力學方程和洛侖茲力方程,運用迭代法得出了載流板殼的非線性磁彈性的計算方法和結果,以及機械場、電磁場對鐵質變厚度圓板各力學參量的影響程度。Roll over protective structure ( rops ) is a device which installs on out of construction vehicle. the main functions are : when the vehicle rolling over. rops can prevent the vehicle from rolling over further, and reduce the possibility of rolling vehicle injures operator ; when the vehicle traveling on freezing soil. concrete and rock, it has large resist continuous impact ability ; when the vehicle overturning rops can support the whole vehicle. arrangement of falling object protective structure ( fops ) can block objects ( such as trees, rocks ) so that supply protection for operator. this problem is that research rolling over and falling objects protective structure of bulldozer by learning research condition of rops / fops and relative lay down international standard. on the base of theory analysis. detrudes counting formula of rops / fops deformation through founding mechanics analysis model of rops / fops at the stage of elasticity and plastoelastic. and finds a set of feasible nonlinear finite element analysis counting. lt calculates rops / fops plastoelastic deforma variable of 320hp bulldozer, bulldozer has been carried out by optimizing design method
其主要功能是:當車輛滾翻時, rops能刺入未凍土壤而阻止車輛的進一步滾翻,降低滾翻的車輛對系著安全帶司機軋傷的可能性;保證rops在碰撞和沖擊變形不大的地面(如凍土、混疑土上、巖石)時,能具有相當大的抗連續沖擊能力;當車輛已經處于顛覆狀態時,已經變形的rops應能支撐住整車。落物保護裝置(簡稱fops ) ,其構件的布置方式要能遮蔽墜落的物體(如,樹木、巖石等) ,以便對司機提供適當的保護。本課題主要通過了解國內外有關對rops fops的研究情況和有關國際標準的制定,對大型推土機傾翻和落物保護裝置進行研究,在理論分析的基礎上,通過建立rops fops的力學分析模型,推導彈性、彈塑性階段rops fops變形的計算公式,建立一套可行的rops fops的非線性有限元分析計算方法。A rate - dependent damage evolution modified zwt nonlinear constitutive ralation is adopted, an object function of least square was established according to the experimental results. the searching space of each decision variable was foreordained with conventional optimizing method, and all parameters in zwt model for solidified pf resin were determined with generic algorithms
基於實驗曲線構建了最小二乘形式的目標函數,並採用傳統優化方法輔助設計了各個決策變量的搜索空間,進而用遺傳演算法確定了損傷型zwt非線性粘彈性本構關系中的材料參數。Base on the mathematic model of load - deflection relationship of the rectangular membrane, micro balloon actuator ' s theory curve of pressure - deflection has been calculated and plotted. after the simplified geometric model of microactuator was set up, by utilizing ansys mooney - rivlin hyperelastic model, nonlinear structural distortion of silicone rubber can be solved
通過建立氣泡薄膜的幾何簡化模型,針對硅酮橡膠的材料非線性特點,選用了適合橡膠類材料的mooney - rivlin超彈性模型,運用ansys軟體對這一非線性結構變形進行了求解。It would make no difference if the bar deformations were totally inelastic.
如果桿的變形完全是非彈性變形時這也就沒有什麼區別了。In this paper, the large non linear fem software marc be used to calculate the 3d deformed distribution of the cold roll forming machine frame, slide seat and bolster plate
摘要以大型非線性有限元軟體marc為分析工具,建立接觸分析模型,對冷滾軋機床機架、滑臺及墊板進行三維有限元彈性接觸分析,給出機床三維變形狀態的定量描述。Eccentrically braced frames ( ebfs ) combines the strength and stiffness of concentrically braced frames ( cbfs ) with the inelastic behavior and energy dissipation of moment - resisting frames, especially inelastic deformation of link absorbs seismic energy
偏心支撐框架結合了中心支撐框架的強度、剛度高和普通抗彎框架的延性、耗能性能好的優點,通過耗能梁段的非彈性變形耗散大量輸入結構的地震能量。For example, when magnetic material being pressed, magnetic domain, direction and strength of spontaneous magnetization will vary. this phenomenon is called effect of pressing magnet. whichever rearrangement of magnetic domain or direction change of spontaneous magnetization will induces extra shape change of material
如對鐵磁材料施加應力時,往往會導致磁疇、自發磁化方向和強度發生變化,這一現象稱之為壓磁效應,由於得益於壓磁效應的作用,不論是磁疇重新排列還是自發磁化方向發生變化都會引起材料額外的形變,因此在一定應力的作用下鐵磁材料能產生非彈性變形。Once the structures step into inelastic work state, the earthquake input energy is dissipated by the damp and inelastic distortion
結構一旦進入非線性階段,其地震總輸入能主要由結構的非彈性變形和阻尼來耗散。Under strong seismic ground movement, after the reinforced concrete bridge columns undergo inelastic deformations, the section happened serious failures and seismic shear strength and stiffness degrade rapidly
在強烈地震作用下,鋼筋混凝土橋墩經歷多次非彈性變形后,混凝土截面發生嚴重破壞,導致強度和剛度迅速下降,墩柱抗剪能力較靜力荷載作用下有很大的區別。In fact, the investigation of earthquake disaster shows that it is true. first, there are inelastic deformations of structures after intensive earthquake. second, there are permanent deformations of structures after intensive earthquake
事實上,震害調查結果表明,結構物在強烈地震作用下,確實曾進入非線性工作狀態,具體表現有:裂縫或其它形式的非彈性變形發生、經歷地震後有永久變形存在等等。The use of equation provided by codes implies that some inelastic panel zone distortion is expected at the predicted strength, and therefore the panel zone is expected to contribute to energy dissipation in a controlled manner during severe seismic loading. the finite element models utilized in this study, and analysis and results are hoped to be some proof for the code modification
由於節點域受剪變形,參與了能量耗散,其非彈性變形增加了鋼框架的側向位移,各國對此進行了很多研究;本文將節點區變形分解為梁、柱和節點域的變形,並推導出了計算公式,從公式中可以看出各部分對側移的貢獻。Then at the elastic - plastic state taking advantage of the brace and eccentric distant, we can control the inelastic deformation of the braced frame. the reinforced concrete frames with eccentric brace conform with the earthquake - resistant principle and its seismic properties have improved remarkably. during the lowly circular and repeated loading, the load - bearing, deformation, and ductility of the eccentrically braced reinforced concerete frames were measured
偏心支撐鋼筋砼框架的設計意圖是當結構在抵抗外力作用時,在彈性階段結構有較高的抗側剛度,而當結構進入彈塑性階段時,利用支撐和耗能段梁的變形使結構的非彈性變形可控,體現了抗震結構「先剛后柔」的原則,使鋼筋砼框架的抗震性能得到有效地改善。The stochastic equation of virtual work based on total lagrangian method is developed to analyze the influences of vicoelasticity, large deformation and randomness simultaneously. the nonlinear equilibrium equations of viscoelastic stochastic fem are derived. the full newton - raphson method is used to get the numerical solutions
建立了基於totallagrangian法的隨機虛功方程,能夠同時考慮粘彈性、大變形以及隨機性的影響,導出了非線性粘彈性隨機有限元平衡方程,分析了其具體迭代求解方法。For metals that experience the gradual elastic - plastic transition, the point of yielding is determined as the initial departure from linearity of the stress - strain curve and this is sometimes called the proportional limit
對于金屬逐步的彈塑性形變轉變,其屈服點確定為應力應變曲線非線性關系的開始,這個點也被稱為比例極限。I. e., the effect of linear and nonlinear analysis, the gradient of pile, the length of pile stick - up, and the horizontal force on the stability of pile stick - up were studied in details. 2. based on the difference of deformation and failure mechanism for pile side soil and pile toe soil, soil mechanics theory, and results of laboratory experiments and field tests, hyperbolic model and ideal elastic - plastic model were proposed to describe the behavior of the soil adjacent to the pile shaft and the soil at the pile toe, respectively
2 .根據土的非線性和非彈性特性以及室內與現場試驗結果,而且基於樁側土體與樁端土體在豎向荷載作用情況下的變形和破壞機理不同,提出應採用不同土體模型分別模擬樁側、樁端土體在打樁過程中所發揮的靜阻力,即:建立了樁側土體雙曲線模型,並推導了樁端土體理想彈塑性模型。分享友人