An apparatus for on-line measurement of eccentricity of electric cable;
用于多层电缆偏心度在线测量的装置
60%;with eccentricity of rod string increases,pressure losses .
60%,证明所建模型和求解方法的合理性;随着抽油杆偏心度的增加,油管内采出液压降和抽油杆阻尼系数均呈下降趋势,作用在抽油杆上的阻力也沿圆周方向不均匀分布,在环空宽间隙的速度梯度和阻力比窄间隙的大;当采出液作层流流动时,阻尼系数由同心时的0。
This paper presents a theoretical model for realistic annular pressure loss calculation in which the eccentricity is a function of the well depth and a simplified method for field calculations.
本文介绍偏心度为井深函数的实际环空中压降计算的理论模型和便于现场使用的简化计算方法。
Some experiments were carried out to measure the rotational speed and the degree of eccentricity.
阐述了系统的工作原理和结构设计,进行了转速和偏心度的测量实验。
The concept of tyre s degree of eccentricity, together with its measurement and calculation methods, and the design method of corresponding digital filter are presented.
介绍了轮胎偏心度概念及其测量计算方法和相应数字滤波器的设计方法 ,并设计了采用感应式位移传感器的偏心度测控系统。
The ratio spectrum distribution pattern and the effects of normalized stiffness eccentricity and rotation frequency ratio on spectrum amplitude are discussed by use of statistic analysis of 30 recordings under bidirectional earthquake excitation in the cases of hard sit.
为此,研究并建立了双向地震作用下结构刚度偏心层体系弹性反应谱模型,定义弹性位移比值谱和加速度比值谱。
The effect of the system parameters on inelastic torsional response is evaluated:stiffness eccentricity es, yield strength eccentricity ep and lateral period T.
以纤维模型模拟双向地震作用下混凝土柱的双轴弯曲,考查刚度偏心es、强度偏心ep和自振周期T等因素对结构扭转的影响。
Mass eccentricity and stiffness eccentricity are two key forms of asymmetric structures.
质量偏心和刚度偏心是结构偏心的两种重要形式,从单层无阻尼结构体系地震作用下的一般振动方程出发,推导得到了不同偏心形式的结构考虑地震动扭转分量时的振动方程。
The effect of the system parameters on inelastic torsional response is evaluated:stiffness eccentricity es, yield strength eccentricity ep and lateral period T.
以纤维模型模拟双向地震作用下混凝土柱的双轴弯曲,考查刚度偏心es、强度偏心ep和自振周期T等因素对结构扭转的影响。
The single eccentric building with different periods influenced by the strength eccentricity is researched using a single model, and the measure of strength eccentricity to control inelastic-coupled response is presented.
着重对比了不同周期的单层偏心结构受强度偏心的影响程度,以此提出了通过改变楼层强度 偏心距来降低结构非弹性扭转效应的方法,并采用基于有限元柔度法的纤维模型梁柱单元模拟分析了钢筋混 凝土偏心框架的非弹性地震反应,对该控制方法的有效性进行了验证。