共查询到19条相似文献,搜索用时 62 毫秒
1.
THECALCULATIONOFEIGENVALUESFORTHESTATIONARYPERTURBATIONOFCOUETTE-POISEUILLEFLOWSongJinbao(宋金宝)ChenJianning(陈建宁)(ReceivedDec.3... 相似文献
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张延松 《应用数学和力学(英文版)》1995,16(11):1065-1072
THEANALYTICRESOLUTIONSANDAPPLICATIONSOFTHENON-LINEARSEEPAGEFLOWEQUATIONSOFCOALINFUSIONZhangYansong(张延松)(ReceivedJan.1,1994.Co... 相似文献
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司建国 《应用数学和力学(英文版)》1996,17(1):29-37
SiJianguo(司建国)(ReceivedMay30,1994,CommunicatedbyLinZongchi)DISCUSSIONONTHEPERIODICSOLUTIONSFORHIGHER-ORDERLINEAREQUATIONOFNEU... 相似文献
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UNCONDITIONAL STABLE SOLUTIONS OF THE EULER EQUATIONS FOR TWO-AND THREE-D WINGS IN ARBITRARY MOTION 总被引:2,自引:0,他引:2
高正红 《应用数学和力学(英文版)》1995,16(12):1209-1220
UNCONDITIONALSTABLESOLUTIONSOFTHEEULEREQUATIONSFORTWO-ANDTHREE-DWINGSINARBITRARYMOTIONGaoZhenghong(高正红)(ReceivedJan.12,1995,C... 相似文献
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THEEXISTENCEOFPERIODICSOLUTIONSFORACLASSOFFUNCTIONALDIFFERENTIALEQUATIONSANDTHEIRAPPLICATIONZhaoJie-min(赵杰民);HuangKe-lei(黄克累)... 相似文献
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章定国 《应用数学和力学(英文版)》1996,17(11):1059-1066
COMPUTERSIMULATIONOFTHEMOTIONOFTHEBULLETBELTOFAIRPLANEGUNZhangDingguo(章定国)(ReceivedMarch17,1995;CommunicatedbyWuRuifeng)Abstr... 相似文献
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刘小湘 《应用数学和力学(英文版)》1994,(11)
THEDIFFERENTIALSOLUTIONTOTHEFLYINCLOCUSEQUATIONOFTHESHOTANDITSAPPLICATIONLiuXiao-xiang(刘小湘) (XiangtaninstituieofMachineryand... 相似文献
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THEGENERALSOLUTIONFORDYNAMICRESPONSEOFNONHOMOGENEOUSBEAMWITHVARIABLECROSSSECTIONJiZhen-yi(纪振义)(AnhuiArchitecturalIndustryColl... 相似文献
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张居铃 《应用数学和力学(英文版)》1994,(1)
ACOMPLETEEXPRESSIONOFTHEASYMPTOTICSOLUTIONOFDIFFERENTIALEQUATIONWITHAN-THORDERTURNINGPOINTZhangJu-ling(张居铃)(SichuanInstituteo... 相似文献
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王凡彬 《应用数学和力学(英文版)》1996,17(11):1101-1106
BLOW-UPANDDIE-OUTOFSOLUTIONSOFNONLINEARPSEUDOHYPERBOLICEQUATIONSOFGENERALIZEDNERVECONDUCTIONTYPEWangFanbin(王凡彬)(ReceivedJune2... 相似文献
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PHRAGMEN-LINDELOFALTERNATIVERESULTSFORTHEINITIALBOUNDARYPROBLEMOFSTOKESEQUATIONCaiChongxi(蔡崇喜)LinChanghao(林长好)(ZhongshanUnive... 相似文献
12.
样条配点法分析结构动力响应的无条件稳定计算格式 总被引:4,自引:0,他引:4
本文以三次B样条函数作为位移时域函数,应用配点法,在任一时间步长中列出两个时刻的结构物运动方程式残值为零的条件并使结果满足了稳定条件得到一个计算结构物动力响应无条件稳定的计算格式。 这个计算格式于参数θ符合0.15<θ<0.05时是绝对无条件稳定的,研究证明,本文所提出的格式的精度根据三项指标:振幅衰减率 AD,周期伸长率 PE 及算法阻尼比都比较Wilson-θ法,Newmark法及Houbolt法的为优,例题计算也证明此点,即本文方法精度较上述三法为高,本文格式简单,准确,工作量不多,可以作为计算结构动力响应有效方法之一。 相似文献
13.
网格湍流微结构的实验研究 总被引:3,自引:0,他引:3
本文试验研究了网格湍流从前期到后期整个连续衰变过程即湍能和Taylor微尺度随时间的变化规律,以及高阶速度相关系数的变化规律,试验结果是在一个低湍流度、低速风洞内,用TSI热线风速仪测得的,而拟均匀各向同性湍流是用在风洞试验段入口处加网格产生的,本文的试验结果与文献[1]提出的涡旋结构理论的计算结果做了比较,发现理论计算的和曲线与本文实测值非常吻合,本文的实测结果与Townsendt早年的试验以及Beanett七十年代末的试验也做了比较。结果表明,这些试验结果彼此也很一致,因而,所有这些试验结果与理论计算值都相互获得了验证。 相似文献
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The problem considered is that of two-dimensional viscous flow in a straight channel. The decay of a stationary perturbation
from the Couette-Poiseuille flow in the downstream is sought. A differential eigenvalue equation resembling the Orr-Sommerfeld
equation is solved by using a spectral method and an initial-value method (the compound matrix method) for values of the Reynolds
number R between 0 and 2000. The eigenvalues are presented for several of interesting cases with different measures of mass
flux. These eigenvalues determine the rate of decay for the purturbation. 相似文献
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《Journal of Fluids and Structures》2000,14(6):757-777
The incompressible, viscous flow over two-dimensional elliptic airfoils oscillating in pitch at large angles of attack, such that flow separation occurs, has been simulated numerically for a Reynolds number of 3000. A vortex method is used to solve the two-dimensional Navier–Stokes equations in vorticity/stream-function form using a time-marching approach. Using an operator-splitting method the convection and diffusion equations are solved sequentially at each time step. The convection equation is solved using a vortex-in-cell method, and the diffusion equation using a second-order ADI finite-difference scheme. Elliptic profiles are obtained by mapping a circle in a computational domain into the physical domain using a Joukowski transformation. The effects of several parameters on the flow field are considered, such as: frequency of oscillation, mean angle of attack, location of pitch-axis and the thickness ratio of the ellipse. The results obtained are shown to compare favourably with available experimental results. 相似文献
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提出了一种不可压缩流体与弹性薄膜耦合问题的特征线分裂有限元解法. 首先, 给出了流场和结构的控制方程. 然后, 对流场、结构以及流固耦合的具体求解过程进行了描述. 其中, 流场求解采用改进特征线分裂方法和双时间步方法相结合的隐式求解方式, 并利用艾特肯加速法对每个时间步的迭代收敛过程进行了加速处理;结构部分的空间离散和时间积分分别采用伽辽金有限元方法和广义方法, 并通过牛顿迭代法对所得非线性代数方程组进行了求解;流场网格的更新采用弹簧近似法;流场、结构两求解模块之间采用松耦合方式.最后, 采用该方法对具有弹性底面的方腔顶盖驱动流问题进行了求解, 验证了算法的准确性和稳定性.此外, 计算结果表明艾特肯加速法可以显著地提高双时间步方法迭代求解过程的收敛速度. 相似文献