摘要:

AbstractThe bending theory of thin shells is used to obtain the dynamic response of a complete cylindrical shell of finite length. The shell is subjected to axisymmetric dynamic loads, normal to the shell surface. The effects of the inertial load in the longitudinal direction are assumed to be negligible. The general solution is exact within the theory, and it is presented in a concise form, which simplifies its application to specific boundary‐value problems. The natural frequencies are calculated from transcendental equations obtained by the application of the respective boundary conditions to the general solution. An illustrative example of a clamped cylindrical shell subjected to a uniform shock with linear decay is presented, including numerical result

ISSN:0044-2267    

DOI:10.1002/zamm.19670470702

出版商:WILEY‐VCH Verlag    

年代:1967

数据来源: WILEY

摘要:

AbstractA study of the hydrodynamic stability of the boundary layer with transverse curvature has been made on the basis of linear theory. Defining ζ as the transverse curvature parameter, (essentially the ratio of boundary layer thickness to the radius of transverse curvature), it is found that axisymmetric mode of disturbance is the most critical up to O(ζ). The transverse curvature itself is found to be destabilizing but the velocity profile due to it can in certain cases make the flow stable. In fact, for the boundary layer flow on a circular cylinder moving axially, it is found that all small disturbances will be damped out if the Reynolds number based on the radius is less than about 11 00

ISSN:0044-2267    

DOI:10.1002/zamm.19670470703

出版商:WILEY‐VCH Verlag    

年代:1967

数据来源: WILEY

摘要:

AbstractBei nahezu konstanter Scherung der inkompressiblen reibungsfreien Grundströmung kann man dieser beliebige Potentialströmungen überlagern. Daher ist es auch möglich, die Methode der Singularitätenbelegung zur Darstellung der Strömung um Profile heranzuziehen. Die auf eine einzelne Singularität wirkende Kraft und der Einfluß der Singularitäten auf die Profilkräfte werden berechnet. Kennt man Wirbel‐ und Quellverteilung für ein Profil in Parallelströmung mit konstanter Geschwindigkeit, so kann man damit sofort die Beiwerte für Auftrieb und Moment für dasselbe Profil in einer Scherströmung in erster Näherung ermitteln. Für die angestellte ebene Platte wird eine exakt

ISSN:0044-2267    

DOI:10.1002/zamm.19670470704

出版商:WILEY‐VCH Verlag    

年代:1967

数据来源: WILEY

摘要:

AbstractThe inviscid three‐dimensional stagnation‐point in magnetohydrodynamics is investigated in full generality. The analytic character of the flow depends on just two parameters, one of which characterizes the streamline pattern on the body and the other the effective interaction of the electromagnetic field. The pattern, according to linear terms, must be either nodal or contain a stagnation line; the spiral and saddle‐point patterns are ruled out. A method of obtaining the flow to arbitrary accuracy is presented; improvement is regressive, i.e. from higher to lower degree terms. With higher‐degree terms the stagnation line in general gives way to a combination saddle‐nodal point which has not been notic

ISSN:0044-2267    

DOI:10.1002/zamm.19670470705

出版商:WILEY‐VCH Verlag    

年代:1967

数据来源: WILEY

ISSN:0044-2267    

DOI:10.1002/zamm.19670470706

出版商:WILEY‐VCH Verlag    

年代:1967

数据来源: WILEY

ISSN:0044-2267    

DOI:10.1002/zamm.19670470707

出版商:WILEY‐VCH Verlag    

年代:1967

数据来源: WILEY

ISSN:0044-2267    

DOI:10.1002/zamm.19670470708

出版商:WILEY‐VCH Verlag    

年代:1967

数据来源: WILEY

ISSN:0044-2267    

DOI:10.1002/zamm.19670470709

出版商:WILEY‐VCH Verlag    

年代:1967

数据来源: WILEY

ISSN:0044-2267    

DOI:10.1002/zamm.19670470710

出版商:WILEY‐VCH Verlag    

年代:1967

数据来源: WILEY

ISSN:0044-2267    

DOI:10.1002/zamm.19670470711

出版商:WILEY‐VCH Verlag    

年代:1967

数据来源: WILEY