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 共查询到20条相似文献,搜索用时 93 毫秒
1.
ONTHEEXISTENCEANDSTABILITYOFSOLUTIONFORSEMI-HOMOGENEOUSBOUNDARYVALUEPROBLEMDongQinxi(董勤喜);HuangXiankai(黄先开)(ReceivedJuly.4.19...  相似文献   

2.
THEPROBLEMSOFTHENONLINEARUNSYMMETRICAL.BENDINGFORCYLINDRICALLYORTHOTROPICCIRCULARPLATE(II)HuangJiayin(黄家寅);QinShengli(秦圣立);Xi...  相似文献   

3.
The Analysis of Stability of Bingham Fluid Flowing Down an Inclined Plane   总被引:2,自引:0,他引:2  
THEANALYSISOFSTABILITYOFBINGHAMFLUIDFLOWINGDOWNANINCLINEDPLANEWangPeiguang(王培光);WangZhendong(王振东)(ReceivedDec.1.1994;Communic...  相似文献   

4.
EFFECTOFMAGNETICFIELDSONVISCOUSLIQUIDCOLUMNWITHFINITELENGTHINAVERTICALSTRAIGHTTUBEWenGong-bi(温功碧);SunKe-li(孙克利)(DepartmentofM...  相似文献   

5.
(黄家寅)(秦圣立)THEPROBLEMSOFNONLINEARBENDINGFORORTHOTROPICRECTANGULARPLATEWITHFOURCLAMPEDEDGES¥HuangJiayin;QinShengli(QufuNormalUn...  相似文献   

6.
SOLVINGTHEFREEBOUNDARYPROBLEMINCONTINUOUSCASTINGBYUSINGBOUNDARYELEMENTMETHODLiYaoyong(李耀勇);ZhangZhili(张自立)(ReceivedJune,18,19...  相似文献   

7.
SOLVINGVIBRATIONPROBLEMOFTHINPLATESUSINGINTEGRALEQUATIONMETHOD¥(许明田,程德林)XuMingtian;ChengDelin(Department.ofMathematicsandPhysi...  相似文献   

8.
THEEXAMINATIONOFTURBULENCEMODELINGWITHLESDATABASESuMing-de(苏铭德)(QinghuaUniversity,Beijing)R.Friedrich(LehrsirhlfurFluidsmecha...  相似文献   

9.
3-DNUMERICALSTUDYONTHEBENDINGOFSYMMETRICCOMPOSITELAMINATESChienWei-zang(钱伟长);HuangQian(黄默);FengWei(冯伟)(ShanghaiUniverstyofTec...  相似文献   

10.
ANELASTICITYSOLUTIONOFANONHOMOGENEOUSHALF-PLANEPROBLEMWoGuo-wei(沃国纬)(ShanghaiJiaotongUniversity.Shanghai)(ReceivedJan.5.1994:...  相似文献   

11.
为了研究碳纳米管在冲击扭矩作用下的动力屈曲,采用了连续模型将碳纳米管模拟成半无限长的弹性连续圆柱壳。将冲击扭矩作用下碳纳米管的动力屈曲问题归结为由于扭转应力波传播导致的分叉问题,此分叉问题被化为一个非线性方程组的求解。最后进行了数值分析,讨论了碳纳米管的不同参数对动力屈曲的影响,发现碳纳米管有极强的抗冲击性,临界屈曲剪应力可高达几百吉帕。  相似文献   

12.
受轴向冲击有限长弹性直杆中应力波引起的分叉问题   总被引:7,自引:1,他引:6  
马宏伟  韩强 《爆炸与冲击》1995,15(4):300-306
研究了有限长理想直杆受阶跃载荷作用的弹性动力屈曲问题。将直杆的屈问题归结为由轴向应力波传播而导致的杆的分叉问题,并考虑了应力波反射的影响。给出了分叉发生的临界条件并对具体实例进行了计算。最后对阶跃载荷及脉冲载荷对杆的动力屈曲的影响进行了讨论。  相似文献   

13.
黏弹性圆柱形壳动力学高余维分岔、普适开折问题   总被引:3,自引:0,他引:3  
讨论两端受到谐波激励的黏弹性圆柱形壳的非线性动力学行为,利用奇异性理论,研究了分岔方程的普适开折问题,严格证明了它是一个高余维分岔问题。余维数为5(含有一个模参数),给出了它的所有可能的普适开折形式。在分岔参数满足某些条件时得到该分岔问题的转迁集及分岔图,展示了一些新的动力学行为,改进和完善了奇异性分析方法。  相似文献   

14.
In this paper, the dynamic buckling of an elastic-plastic column is studied. Let its dynamic buckling under step load be reduced to a bifurcation problem caused by the propagation of axial elastic-plastic stress wave. The critical buckling condition is given and the reflection of the elastic-plastic stress wave is taken into consideration. In the end, numerical computation and conclusions are presented and obtained. Foundation item: the National Natural Science Foundation of China (19672038)  相似文献   

15.
讨论弹性圆柱壳端部受冲击载荷作用,在应力波传播过程中的非对称屈曲问题。通过求解扰动方程得到了动态屈曲的分叉条件、临界载荷和屈曲模态。数值结果表明,当壳壁厚不很薄时,轴对称屈曲临界载荷比非对称临界载荷高;反之,轴对称临界载荷会比非对称临界载荷低。不同的冲击载荷,屈曲模态也将不同。  相似文献   

16.
本文讨论弹性有限长圆柱壳端部受冲击载荷作用,在轴向应力波传播和反射过程中的非对称动态屈曲问题。通过建立和求解扰动方程得到了动态屈曲的分叉条件,临界载荷和屈曲模态。数值结果表明:当壳壁厚不很薄时,轴对称屈曲临界载荷比非轴对称临界载荷高;反之,轴对称临界载荷会比非对称临界载荷低;由于应力波的反射,临界载荷降低,因而更容易发生屈曲,屈曲模态也有其不同特点。  相似文献   

17.
研究在轴向冲击载荷下弹性圆柱壳动态屈曲问题.通过构造哈密顿体系,在辛空间中将临界载荷和动态屈曲模态归结为辛本征值和本征解问题.辛本征解反映了局部的压缩屈曲模态和整体的弯曲屈曲模态,特别是在冲击端为自由支承边界时的特殊屈曲方式.数值结果给出了具体的临界载荷和屈曲模态规律.  相似文献   

18.
An infinitely long, axially compressed, circular cylindrical shell with an imperfection in the shape of the axisymmetric classical buckling mode, undergoing steady or non-steady creep, is analyzed. The axisymmetric problem is solved incrementally using nonlinear shell equations The ratio of the applied stress to the classical buckling stress determines if the shell will collapse axisymmetrically or if it will bifurcate into a nonaxisymmetric mode, and whether or not bifurcation will result in instantaneous collapse. The bifurcation problem is formulated exactly and the initial postbuckling behavior is investigated via an asymptotic elastic analysis, based on Koiter's general theory Numerical results are compared with available experimental data.  相似文献   

19.
The buckling modes of a homogeneously compressed elastic plate on a soft elastic substrate are studied. The critical compression is uniquely determined by the bifurcation equation, but this compression is associated with a wide set of buckling modes. It was proved that any solution of the Helmholtz equation satisfies the bifurcation equation. At the same time, in microelectronics, it is required to know which buckling mode is realized. Experimental and theoretical investigations show that the chessboard-like buckling mode should be expected. In what follows, this problem is discussed theoretically. The expected buckling mode can be found by analyzing the energy of the initial postcritical deformation, and the desired mode is determined from the condition of its minimum. The analytic expression of this energy is obtained. Its minimization results in the chessboard-like buckling mode.  相似文献   

20.
理想直杆中轴向应力波的传播和反射导致的分叉问题   总被引:3,自引:1,他引:2  
对阶跃载荷作用下弹性理想完善直杆中应力波的传播及其反射引起民的分叉问题进行了理论分析和数值计算,讨论了此类动力屈曲问题中横向惯性效应的影响;给出了一种进行后分叉分析的近似方法,得到了一些结论,在各类结构由于应力波的传播及反射引起的分叉问题具有指导意义。  相似文献   

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