拉直載荷 的英文怎麼說
中文拼音 [lāzhízǎihé]
拉直載荷
英文
snatch load-
It is also pointed out that the shear stress along the flow - in direction existing near the junction of straight and curve edges is one of the major components of drawing pressure, and it is very important in the calculation of drawing load of non rotational symetrical drawing
並且指出，法蘭直、曲邊交界附近存在的流入方向剪切力是拉深力的主要成分之一，在非回轉對稱拉深載荷的計算中非常重要。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。It shows that the method suggested in the paper is simple, applicable for engineering and has good precision. on the bases of the formulas deduced, and combining with relative test datas, it studies in the paper several factors influencing the bearing performance of the simple beams, such as shape of the external tendons, the equal moment segment length, span - to - depth ratio of the beam, valid initial prestress of the external tendons, area of the internal tension reinforcement, strength of the concrete, vertical distance between
在公式推導的基礎上，結合相關試驗資料，研究了體外筋的形狀、等彎矩區長度、梁跨高比、有效張拉預應力、體內受拉筋配筋率、混凝土強度、錨固點到樑上邊緣在垂直方向上的距離、體外預應力筋水平段長度（雙折線型體外筋的情況）以及荷載類型等對體外預應力混凝土簡支梁受力性能的影響。Taking the bending stiffness, cable sag and cable inclination into consideration, the space vibration control of the cables using the visco - elastic dampers in cable - stayed bridges is investigated by joining the center difference method and the state space strategy. both the maximum modal damping ration and the optimal damper size are obtained, then the practical suggestions are proposed for the design of the dampers. the space nonlinear vibration equations of the cable - damper system are derived, and a new hybrid method for solving the cable - damper system is presented by combing the newmark method and pseudo - force technology
綜合考慮了拉索抗彎剛度、垂度的影響，研究了粘彈性阻尼器對斜拉橋拉索的空間振動控制，聯合中心差分方法及狀態空間法，得出了拉索麵內、外振動各階模態可能達到的最大阻尼比及相應的最優阻尼器系數，並對斜拉橋拉索的阻尼器設計提出了參考建議：考慮拉索抗彎剛度、垂度及幾何非線性，導出了索-阻尼器系統的空間振動非線性方程組，結合newmark方法及偽力（ pseudo - force ）方法，創新地提出了求解非線性方程組的雜交方法，根據拉索-阻尼器系統的阻尼特性，在各種荷載作用下，對索-阻尼器系統的非線性瞬態振動響應進行了研究，從系統響應的角度更加直接地驗證了阻尼器的控制效果。The friction coefficient, critical vertical loads and critical frictional resistance strength have been worked out by means of the pullout tests under the different vertical loads, analysis of frictional characteristics between soil and material and analysis of the different work mechanism between direct shear test and pullout tests. the creep characteristic parameters of some typical reinforcement materials have been obtained by the creep tests under the loads for a long time and the rheological analysis
對幾種典型筋材在不同法向荷載下進行了拉拔試驗，並進行了筋材與土介質的界面摩擦特性分析，直剪試驗與拉拔試驗不同機理分析，找出了影響摩擦特性試驗結果的主要因素；得出了筋材在工作荷載階段的摩擦系數、臨界法向中南大學博士學位論文荷載和臨界摩阻強度。As far as he hollow inclined column - wall transfer r. c joint is concerned, the stress state of transfer beam is very critical, because it bears not only the vertical load transferred from the wall, but also the axial load initiated by the inclined column
對有孔斜柱轉換節點而言，轉換梁的受力最為不利，它不僅承擔由薄壁柱傳來的垂直荷載，而且還承擔由斜柱水平分力引起的軸向拉力，即截面上有彎矩、剪力和軸力的共同作用。The proposed model - beam - particle model is validated to simulate some routine tests of concrete which including uniaxial compressive test and uniaxial tensile test to prove that the numerical model can effectively to describe the complete failure process caused by the initiation, propagation and coalescence of cracks. the influence of the meso - mechanical properties to the macroscopic failure behavior is discussed in this paper. the proposed model is employed to simulate the dynamic failure process of concrete under impact loading, and analyse the failure behavior of concrete with different impacting velocity
本文建立了混凝土的梁-顆粒數值模型，並利用該模型進行了混凝土在單軸壓縮和拉伸載荷作用下，混凝土從微裂紋的萌生、擴展、貫通直到宏觀裂紋產生導致破壞的全過程的數值模擬，探討了混凝土材料細觀結構對其宏觀力學行為的影響；利用該數值模型，模擬了鋼彈以一定的初始速率垂直侵徹混凝土圓板的動態過程，對計算結果進行了動畫顯示，並分析了不同鋼彈初始速率對混凝土圓板破壞形式的影響。4. with the consideration of practical soil - pile interaction, the soil around pile is modeled as a three - dimensional viscous - elastic continuous medium and the time effect of the settlement of single pile is studied. the semi - analytical solutions for vertical displacement of soil and for the relationship between settlement of pile head and time were obtained by laplace transform method and fourier inverse method, and the law of the settlement of pile head varying with time was then analyzed and discussed
考慮樁土藕合作用的單樁沉降時間效應研究從研究空間軸對稱問題的角度出發，將樁周土體建模為三維粘彈性連續介質，更為合理地考慮了靜荷載下樁土系統中單樁與樁周土的藕合作用，分別建立了樁周土體和樁體的靜力平衡方程，並通過拉普拉斯變換、傅立葉逆變換等數學手段，獲得了單樁樁周土體的垂直變形和樁頂沉降在拉普拉斯變換域內的解析解和在時間域內的半解析解，進而分析討論了單樁沉降隨時間變化的規律。分享友人