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    It put forward the method to determine plastoelastic fatigue notch factor by means of experimental results contrasting smooth specimen with notch specimen.
    借助于光滑试件和缺口件的对比实验结果,提出确定弹塑性疲劳缺口系数的方法。
    With Duffy's shear modulus of molybdenum, the results of Y/G is obtained. Between 10.0 GPa and 16.0 GPa, Y/G is near to 0.02, but departure above 16.0 GPa. It is more reasonable to think Y/G consistent a linear relationship Y/G=0.0007+0.0001P.
    根据Duffy等人剪切模量的结果,发现Mo的Y/G在10.0GPa-16.0GPa之间接近于0.02,而在其他压力范围均偏离该值,在整个实验压力范围内Y/G似乎更加接近Y/G=0.007+0.001P的线性关系。
    Then the influence of different characteristic of structure and earthquake on pushover evaluating result was analyzed. It was demonstrated that different structural and earthquake characteristic had different influence on the results of pushover analysis method.
    分析结果表明,不同结构特性、地震动特性对pushover法的计算结果具有不同的影响,其中结构自振周期对pushover法的应用准确性具有重要影响,结构形式和单元恢复力滞回模型对pushover法计算结果的影响较小,地震加速度峰值和场地特征周期具有一定的影响,而竖向地震动的影响则较小。
    In recent years, with the development of CFD(Computational Fluid Dynamics) it has become an important research direction to use CFD to study the mechanism of the flow in the pump and then optimize the design with the simulation result.
    近年来,随着计算流体力学(CFD)的发展,从研究离心泵流体流动机理出发,使用数值仿真研究离心泵内部流动,利用数值仿真结果来指导泵的设计已经成为重要的研究方向。
    In this paper, it is a attempt that the dynamic analysis of structures is carried out against this low frequency part with lesser sampling points of wavelet decomposition, then data, and the results are compared with dynamic computation using the original earthquake record and result to multiple time-step length directly.
    所以本文尝试把由小波分解得到的采样点较少的低频部分用于结构的动力学计算,然后对所得数据进行不同重构处理,并把结果与使用原始地震纪录的动力学计算,以及直接成倍扩大时间步长的计算结果进行比较。 试图找到在各种情况下,既能根据需要尽可能多地减少计算量,精度又符合要求的数据处理方法。
    By comparing the results from this method with those from Hahn's, it is shown that the former is better than the latter.
    通过用本文的方法所得的结果与Hahn方法的结果相比较,说明用本文提出的方法能获得更好的结果
    The value of the rotational factor γ_p at initiation for different ratios of a/W has also been studicd, and it is sbown that γ_p is decreasing with decreasing of a/W.
    利用引伸计和硅橡胶对不同a/W值时的转动因子r_p值进行了试验研究,试验结果表明,r_p值随a/W值的减小而减小,当a/W=0.5时,r_p=0.45; 而当a/W=0.1时,r_p=0.16。
    The results indicate that it is available and sSatisfied to identify the mode parameters of the chimney by the enviromental random exciting method.
    结果表明,对于烟囱这一类难于由理论计算得到精确解的结构,用环境随机激振方法来识别其模态参数是可行的,并能得到满意的结果
    It is shown that the values of K_I ~C for specimens with shallow notches are larger than those of deep notches, and when a/W=0.1, the K_I ~C value is about 1.1 times larger than the K_I ~C value when a/W=0.5.
    试验结果表明,高强度钢38CrMoAl的临界应力强度因子值,随a/w值之减小而增加,但增加的程度较低强度大塑性材料少,其浅裂纹(a/w=0.1)时的K_(IC)值为深裂纹(a/w=0.5)时的1.1倍.
    It is shown that the maximum damping effect is achieved when the order of fractional derivative liesin between 1/3 and 1/2.This is in good agreement with the Rouse's molecular theory and the data which is measured by fitting curve.
    结果表明:当分数导数阶数在-1/2和1/3之间时,材料的阻尼效果最佳。 这与 Rouse 的分子理论和由实验曲线拟合所得结果一致.
    An example for semicone angle of die θ=30° has been calculated by this method. It has been shown that the results from this method are the same with those from the conventional solution.
    模角θ=30°的计算实例表明上述方法求得结果与传统方法计算结果一致。
    A survey of dynamic tensile testing of materials using the hollow Hopkinson bar instead of the solid Hopkinson bar is presented, it is substantiated that the hollow Hopkinson bar has more advantages than the solid Hopkinson bar.
    本文给出用Hopkinson空心杆代替实心杆进行材料动态拉伸性能测试实验研究。 实践证明,Hopkinson空心杆比实心杆有明显优点,我们利用了空心杆测试材料动态拉伸性能,使测试结果较实心杆有明显改进。
    It is shown that the stress and strain singularities are, respectively, of the order of lnR/r)~δ and (lnR/r)~(-nδ).
    分析结果表明,在裂纹尖端,应变具有(1n R/r)~δ奇异性,应力具有(1n R/r)~(-nδ)奇异性。
    It is assumed that the medium obeys the J_2 flow theory and damage rule is given asymptotically in a form like power-law strain softening. It is shown that the stress and strain singularites given are of the orders (lnR/r)~(-n/(n+1))and(lnR/r)~(1+(n+1)) respectively.
    假定材料服从J_2流动理论,且损伤规律以幂律应变软化的规律给出,其结果表明:在裂纹尖端附近,应力和应变分别具有如下的奇异性:σ/(1n R/r)~(-n/n+1),∈~(1n R/r)~(1/n+1),并且通过数值计算给出了裂纹尖端附近的应力分布。
    It can be seen that the present analytical result is of high accuracy and wide practicability, and agrees well with the author's experiment.
    本文的理论分析与其他作者的理论分析比较表明,本文的分析结果具有很高的精度和广泛的实用性,并与作者的实验结果吻合较好.
    It is found that when H/k>1.0, S>0 is obtained in the range of y/H< 0.2, which means that there exist the low speed streaks, i. e. the turbulence of the flow is produced by the phenomenon called 'burst'.
    结果表明:对于完全粗糙床面,当H/k>1.0时,在y/H<0.2的范围内有S>0,这意味着可能也存在低速条带,即流体紊动亦是由猝发所致;
    It is shown that the stress and strain singularites are repectively, of the order(lnR/r)~(1/(n-1))and(lnR/r)~(n/(n-1)).
    分析结果表明,在裂纹尖端应力具有(In(R/r))~(1/(n-1))的奇异性,应变具有(In(R/r))~(n/(n-1))的奇异性.
    It is more simple and generalized than differential and matrix method.
    这比微分方程法和矩阵方法简单、直观,所得结果也更具有普遍性。
    It has been known that velocity distribution in conical kerf with thickness δis the same as that in circular kerf with thickness δcosα, here αis half of theconical angle.
    结果表明,就速度分布而言,厚度δ的圆锥环状缝隙相当于厚度为δcosα的圆柱环状缝隙,α为半锥角。
    The uncertainty of the equation is analysed,and the result shows that it has suitable accurocy only in a part of the temperature range of the meteorological field.
    本文对马格纳斯方程的误差进行了分析,结果表明,该方程只在气象领域温度范围的部分温度区间内有良好的精确度,超出这部分温度区间的应用是不适当的。
 

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