Non-uniform loading can reduce the collapse resistance of worn casings.
针对非均匀载荷下套管磨损后抗挤强度降低的问题,将磨损简化为套管的壁厚不均度和内壁不圆度几何缺陷。
API casing bulletin gives the formulas and calculations of casing collapsing strength under uniform loading,but the effect of non-uniform loading on casing collapsing strength has been hardly researched.
API套管规范确定了套管在均匀流体静压载荷作用下的抗挤强度计算方法 ,而非均匀载荷对套管抗挤强度的影响几乎没有进行研究或作出规定。
When analyzing the strength of casing in the high-temperature and high-pressure well, the effects of the creep of the casing as well as the non-uniform loading caused by the creep of wall rock are very important.
高温高压井强度分析设计时,围岩蠕变引起的非均匀载荷和套管的长期蠕变等因素对结果的影响很大。
Computation of casing strength under non-uniform load;
非均匀载荷下套管强度的计算
Based on the model of the non-uniform load, the paper researched the collapsing strength of the slotted casing with N80 steel and established 3D finite element model by adopting the finite element method.
研究表明,管体抗非均匀载荷的能力远远低于抗均匀载荷的能力,非均匀载荷作用下不均匀系数是影响强度的关键因素。
The N80 perforated casing is studied based on the establishment of the non-uniform load model.
依建立的三维有限元模型及弹塑性理论为基础,借助有限元软件,对射孔管体抗非均匀载荷能力进行了数值模拟。
The situation of casing collapse is serious in creep formations,and the mainly reason is the nonuniform loading distributed.
蠕变地层套管损坏的主要原因是套管外壁受到蠕变地层的非均匀载荷作用,套管本体抵抗非均匀载荷能力远远低于套管抗挤强度而产生缩径变形。
In this thesis, it will be researched against the strength and stability of the cylindrical shell under nonuniform loading and the transition structure models of the cylindrical shell, using the finite element analysis software ANSYS.
本论文主要针对圆柱壳在各种非均匀载荷作用下，以及不同直径圆柱壳过渡段结构型式，进行了应力强度和稳定性分析与研究，并结合通用有限元软件ANSYS对圆柱壳结构进行建模计算和对比分析。
Application of Fractional Calculus to a Linear Third Order (Nonhomogeneous and Homogeneous) Ordinary Differential Equation;
应用分数微积分求线性三阶常微分方程(包含均匀及非均匀)的特解(英文)