查询词典 dynamic system

In this paper,the dynamic responses of caisson breakwater under wave forces are studied through finite cell simulation and dynamic analysis means.

运用有限元方法和动力分析方法，对沉箱式防波堤在近破波作用下的动力响应进行了研究。

In this paper,the dynamic responses of caisson breakwater under simulated stochastic wave forcesare studied through Monte Carlo simulation and dynamic analysis means.

本文运用蒙特卡罗法和动力分析方法，对沉箱式防波堤在随机模拟近破波作用下的动力响应进行了研究。

Dynamic changes of three protective enzymes activity and MDA content of Catalpa 'Jinsi' and C.'Yuanjichangguo' during softwood cutting time were studied. And the relations between its dynamic changes and rooting rate were analyzed and discussed.

以金丝楸和圆基长果楸的嫩枝为材料，研究了ABT处理下扦插生根过程中3种保护酶活性和丙二醛含量的动态变化，分析了其变化规律与生根的关系。

Therefore,the complicated problem is simplified into asolving procedure of a group of infinite dimensional algebra equations.In thefact,not only is a general solution of the problem obtained,but also a method tocompute the dynamic thermal stress distribution at the surface of the cavity afterthe definition of the coefficient of the dynamic thermal stress distribution isgiven.

事实上，不但得到了单连通区域或复连通区域型二维孔洞表面的动态热应力分布问题的一个一般的解析解，而且，在定义了非耦合和耦合无量纲化动态热应力分布系数后，推导出计算单连通区域或复连通区域型二维孔洞表面的动态热应力分布的方法。

By the finite element simulation to Qingchuan Bridge dynamic characteristic, the thesis discusses manifold factors which influence the dynamic characteristic of half-through concrete filled steel tubular arch bridge, and gets some conclusions.

本文通过对晴川桥的动力特性进行有限元模拟，论述了影响下承式钢管混凝土拱桥动力特性的多种因素，并得出了一些结论。

Secondly, in terms of the dynamic development of harmony in chorus, this paper expounds harmony in chorus in different periods in the history of music: harmony in the structure of contrapuntus in the Renaissance chorus, harmony in contra-structure in Baroque chorus, harmony in chorus of the classical period, harmony in chromaticism the expansion of modes in the romantic period. These dynamic features of harmony display the principle of formal beauty in western chorus.

从合唱音乐的语言形式上看，作为美学特征的"和谐"表现在音程、和声、对位结构之中：从合唱音乐的历史发展上看，"和谐"则表现为文艺复兴时期对位结构中的"和谐"、巴洛克时期的对位与和声相结合中的"和谐"、古典主义时期的旋律与和声相结合的主调音乐中的"和谐"、浪漫主义时期半音化和声与扩张的调式中的"和谐"。

Central cracked circular disk; split Hopkinson pressure bar; dynamic fracture ; dynamic stress intensity factor

中心裂纹圆盘；分离式霍普金森压杆；动态断裂；动态应力强度因子

The results show that the flow stress decreases with increasing deforming temperature and increases with increasing strain rate. The flow stress of the alloy during hot compression deformation can be described by constitutive equation in hyperbolic sine function with a hot deformation activation energy of 196.27 kJ/mol. Partial recystallization takes place in the alloys deformed at a high temperature or at a low strain rate, and large number of dislocations and subgrains are observed in the alloy. The elongated grains observed in the samples coarsen with increasing temperature and decreasing strain rate. Correspondingly, the subgrain size increases and the dislocation density decreases. The main soften mechanism of the alloy transforms from dynamic recovery to dynamic recrystallization.

结果表明：Al-Cu-Mg-Ag耐热铝合金在热压缩变形中的流变应力随着温度的升高而减小，随着应变速率的增大而增大；该合金的热压缩变形流变应力行为可用双曲正弦形式的本构方程来描述，其变形激活能为196.27kJ/mol；在变形温度较高或应变速率较低的合金中发生部分再结晶，并且在合金组织中存在大量的位错和亚晶；随着温度的升高和应变速率的降低，合金中拉长的晶粒发生粗化，亚晶尺寸增大，位错密度减小，合金的主要软化机制逐步由动态回复转变为动态再结晶。

The paper includes:The author calculate the structures inner force and displacement of the free end , analyze the influence of the height and the value of pretress of cable by making use of ANSYS 9.0 soft, pose the concept of critical prestress,conclude the function relation between displacement of the free end, initial strain and the height of cable ,analyze the dynamic properity and point out that Newmark-β method should be adopted when we analyze the dynamic properity of the cable-stayed spatial structure with direct integral test to guarantee the contribution of high mode,finally conclude the functional relation among coefficient of earthquake inner force, initial strain and the height of cable, wish to get some helpful conclusion applied to cable-stayed spatial truss design.

本文系统介绍了斜拉空间桁架竖向地震反应的分析理论与方法、详细分析了斜拉空间桁架结构在静力和竖向地震作用下的受力性能，主要内容包括：利用通用有限元软件ANSYS9.0计算了斜拉空间桁架在静力和竖向地震作用下内力及自由端位移分布规律并得出地震内力系数与节间位置、预应力以及斜拉索高度之间的函数关系；详细分析了斜拉索中施加的预应力以及斜拉索高度的变化对于该种结构内力及自由端位移的影响并提出了斜拉空间桁架的临界预应变概念，进而得到了自由端位移与初始预应变以及斜拉索高度的函数关系，即：△=-(40h+2180)ε+9.8；分析了该种结构的动力性能，并指出：在时域内采用直接积分法计算该种结构的动力响应时，应该考虑采用不引起振幅率减小的Newmark-β法，以保证高阶模态响应的贡献仍然保留在响应中而不致于被忽略。

With the raise of a calculation method on dynamic friction coefficient of downhole tubing, the calculating accuracy of vertical conduit flow pressure is strengthened for a gas well, which promotes the dynamic analysis and prediction on gas well production.

气井井下油管动态摩阻系数计算方法的提出，提高了气井垂管流动压力计算的精度，对气井生产动态分析和预测起到了很好的推动作用。

Now she was hungry and angry.She began to smoulder.

现在她又饿又气，她开始流露难以抑制的怒火。

You have placed our iniquities before You, Our secret sins in the light of Your presence.

诗90：8 你将我们的罪孽摆在你面前、将我们的隐恶摆在你面光之中。