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eight-degree
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     An indoor simulated fatigue test on semi-axle of model PY160 grader is carried out. The article describes the determination of the eight-degree load spectrum, the calculation of loading spectrum, the fatigue test and the analysis of test results. It provides a reliable bass for the design, process and operation of semi-axles.
     本文对PY 160型平地机半轴进行了室内模拟疲劳试验研究,包括八级作业载荷谱的确定、加载载荷谱的折算、疲劳试验和结果分析,为半轴的设计、工艺和使用提供了可靠的依据。
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  “eight-degree”译为未确定词的双语例句
     In this paper proved that eight-degree nonconforming doubly guadric quadrilateral plate element pass the generalized path test under the condition dk=o(h~2) i.e. proved convergence and gave convergent order
     本文在条件dK=O(h~2)下,证明了八个自由度的不完全双二次四边形非协调板元通过广义分片检查,亦即证明了收敛性,并给出其收敛阶。
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     Eight warm
     8·温暖
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     Eight species, D.
     boryanum ,陕甘介蕨D .
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     Study on eight extra-meridians
     奇经八脉探讨
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     Results Twenty-eight strains Y.
     结果 检出Y .
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     Degree of graphitization
     石墨化度
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In this paper the curved coordinate system has been applied for the seismic response analysis of curved girder bridges. To include the warping effect the curved beam elemeut with eight degrees of freedom is utilized. The element stiffness matrix, element mass matrix and seismic mass matrix in three directions for both girder and pier elements have been derived. The results of the computed example are close to those obtained from other methods.

本文采用曲线座标系来计算曲梁桥的地震反应。为了计入约束扭转的影响,演引了每节点八个自由度的曲梁单元及墩单元的刚度矩阵及三个方向地震质量矩阵,经过数例的计算比较,效果良好。

The crosslinked PE samples which have different degree of crosslinking have obtained in Roller and Dlater vulcanizing press. DCP is used as a crosslinking agent.The morphology of crystals and Mc of the said sample shave been studied by means of DSC, polarizing microscope, SALS technique and method of swelling epuilibrium.The experiment results,show that as the degree of crosslinking increasesto 89.7%, the Mc is about 8000, the melting point of PE decreases by about eight degrees and the temperature of crystallization...

The crosslinked PE samples which have different degree of crosslinking have obtained in Roller and Dlater vulcanizing press. DCP is used as a crosslinking agent.The morphology of crystals and Mc of the said sample shave been studied by means of DSC, polarizing microscope, SALS technique and method of swelling epuilibrium.The experiment results,show that as the degree of crosslinking increasesto 89.7%, the Mc is about 8000, the melting point of PE decreases by about eight degrees and the temperature of crystallization decreases also by seven degrees, but the change in degree of crystallinity is small in reality.Also it is found from polarizing microscope and SALS photographs that the average diamater of spherulite increases from 3μ to 10μ as the degree of crosslinking increases to 89.7%.We believe that less number of spherulites but with larger diameters are produced as a result of the network structure of the crosslinked PE hindering the nucleation in crystallization.

本文采用差动热分析、偏光显微镜和小角激光散射及溶胀平衡方法测定等实验手段、对制取的交联度不同的聚乙烯样品进行了研究。从所得的数据与照片中发现:随交联度上升,交联聚乙烯球晶的平均直径以及熔融温度区间均上升,而熔点、开始结晶温度则下降,Avrami拍数则首先下降而后回升、试样的结晶度基本保持不点、变。当交联度达到89%时,约为8000。上述实验说明由于熔融交联限制了大分子间的相对运动,影响了结晶过程,致使交联后的样品生成了直径较大,而形态不够完整的大球晶,又因>8000,因而交联对结晶度影响不明显。

This paper investigates a method for analysis of the dynamic behaviour of viscoelastically damped structure. According to the constitutive relations of viscoelastic material expressed in the form of fractional derivative operators, the analysis expressions of mechanic properties of a viscoelastic material is constructed by fitting the experimental data. A sort of finite element model of sandwich beam with eight degrees of freedom is set up. Thereby the typical equations of motion of viscoelastically damped structure...

This paper investigates a method for analysis of the dynamic behaviour of viscoelastically damped structure. According to the constitutive relations of viscoelastic material expressed in the form of fractional derivative operators, the analysis expressions of mechanic properties of a viscoelastic material is constructed by fitting the experimental data. A sort of finite element model of sandwich beam with eight degrees of freedom is set up. Thereby the typical equations of motion of viscoelastically damped structure are given. A method for solving nonlinear eigenvalue problem by iteration is suggested to -analyze the dynamic behaviour of viscoelastically damped structure. The method mentioned above has been applied to the complex modal analysis of a cantilever beam with viscoelastic damping material core. A proof test is given, and the agreement of the result of analysis with that of mesurement shows that the method suggested in this paper is reliable and possesses better accuracy and practicality.

本文研究了粘弹性阻尼结构动力特性的分析方法。根据分数导数模型表示的粘弹性材料本构方程,对一种阻尼材料用拟合法构造了它的力学性能解析表达式。建立了一种八自由度夹层梁有限元模型,从而给出了粘弹性阻尼结构的典型动力学方程。为分析粘弹性阻尼结构的动力特性,提出了一种非线性特征值问题的迭代解法。应用上述方法对悬臂约束阻尼层梁的复模态参数进行了分析,并进行了实验验证。结果表明,分析与实验的结果一致,说明本文所提出的方法是可靠的且有较好的精度和实用性。

 
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