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measurements of the viscoelasticity
相关语句
  粘弹性测量
     THEORETICAL AND EXPERIMENTAL STUDIES ON THE PARADOX OF THE WATER'S ELASTIC COMPONENT IN THE MEASUREMENTS OF THE VISCOELASTICITY
     粘弹性测量中水的弹性分量佯谬的理论和实验研究
短句来源
  相似匹配句对
     TEST & MEASUREMENTS
     测试与仪器
短句来源
     The measurements are in mm.
     文中量度单位为mm .
短句来源
     2 Measurements
     率的比较采用x2检验。
短句来源
     THE MEASUREMENTS OF CRANIAL HEIGHT
     颅骨高度的测量
短句来源
     RADIOGRAPHIC MEASUREMENTS OF CALCANEUM
     跟骨X线测量
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When the outer cup of a co-axial rheometer oscillates at a relatively high frequency , the moment measured by the wire connected to the inner bob shows a phase lag, even if the fluid under measurement is Newtonian(“the paradox of the elastic component of the water”). It is believed that such a phase lag is attributed to the inertia due to the fluid as well as due to the inner bob. Without special modifica-tions , significant error may be incurred in the measurements of the viscoelasticity. The present...

When the outer cup of a co-axial rheometer oscillates at a relatively high frequency , the moment measured by the wire connected to the inner bob shows a phase lag, even if the fluid under measurement is Newtonian(“the paradox of the elastic component of the water”). It is believed that such a phase lag is attributed to the inertia due to the fluid as well as due to the inner bob. Without special modifica-tions , significant error may be incurred in the measurements of the viscoelasticity. The present paper is a new step of the authors, attempts to account for these iner-tial effects. Comprehensive theoretical analysis is made about the inertial effects both due to the fluid and due to the bob,by adopting the new scheme of reducing to a two-point boundary value problem of ordinary differential equations , proposed earlier by the present authors; It is indicated that the harmful resonance phenomena can be eliminated in the working range of oscillation frequency by decreasing therotational inertia moment of the bob and increasing the rigidity of the wire ,or by increasing the damping of the bob by the air. Under such circumstances the inertial effect due to the bob may be neglected (with the bob being considered stationary)and only the inertial effect due to the fluid needs considering,thus greatly simplify-ing the problem.

当双筒流变仪的外筒以较高频率振摆时,即使被测的是牛顿流体,连接于内筒的扭丝所测出的力矩仍有相位滞后(“水的弹性分量困惑”),其原因是流体和内筒都有惯性。本文采用作者以前提出的化为常微分方程两点边值问题的新算法,对于流体与内筒的惯性效应做了详细的讨论。文中指出,只要设法减小内筒转动惯量和提高扭丝刚度,或者增大对内筒的空气阻尼,就可以避免在工作频率范围内发生共振现象。这时,可以不考虑内筒振摆而假设内筒静止,只考虑流体自身的惯性而使问题简化。

A new method of measuring viscoelasticity of lubricants is developed, in which the relationship between shear stress and shear rate of lubricants and its constitutive equation are treated with system analysis. By this method, the frequency characteristic graph of the constitutive equation of lubricant with VI additive is obtained. The measurement of the viscoelasticity of the lubricants with four VI additives in the different concentration and temperature is done. And the regression of the...

A new method of measuring viscoelasticity of lubricants is developed, in which the relationship between shear stress and shear rate of lubricants and its constitutive equation are treated with system analysis. By this method, the frequency characteristic graph of the constitutive equation of lubricant with VI additive is obtained. The measurement of the viscoelasticity of the lubricants with four VI additives in the different concentration and temperature is done. And the regression of the experimental data by Maxwell constitutive equation produces an experimental formula of the shear elastic modulus of these lubricants. This formula presents the relationship among the shear elastic modulus, concentration of the additives and temperture.

本文将系统分析原理引入到对润滑剂本构方程的研究中来,进而提出了一种对本构方程研究的新的实验方法。通过实验得到了含增粘剂润滑油的本构方程的频谱特征图,从而证实了该方法的可行性。将四种增粘剂润滑油在不同增粘剂含量不同温度下的实验数据按照Maxwell流变模型进行回归,得到流变参数(剪切弹性模量)与增粘剂含量、温度之间的关系,给出了回归公式。该公式在一定范围内反映了流变参数的变化规律。

When measurement of the viscoelasticity of a fluid is made by using a coaxial rheometer, a phase lag in the measured moment on the inner bob is observed even if the fluid is Newtonian. This is called the paradox of the water's elastic component. The present paper demonstrates, through both theoretical and experimental studies, that such a paradox is attributed to the inertial effects of the fluid and the inner bob. How to eliminate or reduce such inertial effects is discussed in this paper as well....

When measurement of the viscoelasticity of a fluid is made by using a coaxial rheometer, a phase lag in the measured moment on the inner bob is observed even if the fluid is Newtonian. This is called the paradox of the water's elastic component. The present paper demonstrates, through both theoretical and experimental studies, that such a paradox is attributed to the inertial effects of the fluid and the inner bob. How to eliminate or reduce such inertial effects is discussed in this paper as well.

在使用双筒流变仪进行粘弹性测量时,即使被测的是水这样的牛顿流体,连接于内筒的扭丝所测出的力矩仍有相位滞后,即出现了水的弹性分量佯谬。本文从理论和实验两方面进一步证实了产生这一佯谬的原因是:流体和内筒都有惯性。进而指出了消除这一惯性效应所采取的措施。

 
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