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1.
Walter P. Reid 《Applied Scientific Research》1967,17(4-5):291-295
Summary The problem solved is that of determining the small transverse vibrations of a thin elastic plate in the shape of a 30° right triangle. The plate is simply supported on all sides, and started with a prescribed initial velocity. 相似文献
2.
Thin triangular blunt-nosed plate in a viscous hypersonic flow 总被引:1,自引:0,他引:1
The effect of a small blunt nose on the hypersonic flow past a thin, high-sweep and high-aspect-ratio plate at small incidence
is investigated. The analysis is made by means of numerical simulation within the framework of the parabolized Navier-Stokes
equations and the Euler equations in combination with approximate methods for calculating the heat transfer. The results are
compared with the data of experiments in which some nontrivial features of the heat flux distributions over the thin plate
surface were revealed. 相似文献
3.
Xu Zhongnian 《Acta Mechanica Sinica》1986,2(2):185-192
A simple and efficient triangular finite element is introduced for plate bending application. The element is a three-node
triangular one with three basic degrees of freedom per node and two internal rotation degrees of freedom, using selective
reduced integration. Numerical examples indicate that, despite its simplicity, the element is not only competitively accurate,
but also useful as a thick/thin triangular plate bending element. It is also pointed out that this element using selective
reduced integration is in fact a mixed element. 相似文献
4.
5.
An experimental investigation [1] of hypersonic flow over a blunt-nosed triangular plate revealed anomalies — the presence
on the windward side of narrow bands of intensified heat transfer. Below, this effect is related to the appearance in the
flow near the surface of regions of gas spreading induced, in its turn, by the interference between the bow shock (due to
the blunt nose) and the leading edges of the plate. This spreading is called inertial, since it takes place at almost constant
pressure.
Moscow. Translated from Izvestiya Rossiiskoi Akademii Nauk, Mekhanika Zhidkosti i Gaza, No. 2, pp. 131–137, March–April, 1994. 相似文献
6.
7.
G. N. Dudin 《Fluid Dynamics》2000,35(1):101-107
The flow formed as a result of gas injection through the permeable surface of a triangular plate is investigated in the regime
of strong viscous-inviscid interaction between the hypersonic flow and the laminar boundary layer. The features of the flow
past strongly cooled surfaces with the formation of supercritical and subcritical flow regions in the boundary layer are studied.
The injected gas distribution ensuring the existence of self-similar solutions in the supercritical flow regions is obtained.
Moscow. Translated from Izvestiya Rossiiskoi Akademii Nauk, Mekhanika Zhidkosti i Gaza, No. 1, pp. 125–133, January–February,
2000.
The study was carried out with the support of the Russian Foundation for Basic Research (project No. 96-01-01391). 相似文献
8.
复合材料层合板精化高阶理论及其精化三角形板单元 总被引:2,自引:0,他引:2
提出一种新的精化高阶理论,该理论满足层间位移、应力连续条件,由此建立了三角形精化板单元。该单元满足单元间C1类弱连续条件,其收敛性得到保证,且具有简单、高效率的优点。 相似文献
9.
10.
The dynamic equation of a viscoelastic floating ice plate under a triangular pulse load is solved analytically through the Hankel transformation and the Laplace transformation. The effects of physical and geometrical parameters of the problem on the displacement response as a function of time and spatial coordinate are discussed. 相似文献
11.
Nonlinear Dynamics - In this paper, two three-node triangular thin plate/shell elements are proposed based on the absolute nodal coordinate formulation. As the gradient deficient element, the thin... 相似文献
12.
Alexander Olshevskiy Oleg Dmitrochenko Seoungsoo Lee Chang-Wan Kim 《Nonlinear dynamics》2013,74(3):769-781
In this paper, the process by which geometrical and structural matrices of plate finite elements employing absolute nodal coordinate formulation (ANCF) are constructed is studied. The kinematic and topological properties of an arbitrary plate finite element are described using universal digital code dncm that provides systematic enumeration of finite elements. This code is formed using the element’s dimension d, the number of nodes it possesses n, the number of scalar coordinates per node c, and a multiplier describing the process of transforming a conventional finite element to an ANCF element m. The detailed generation of a new type of triangular plate finite element 2343 using numerical computation of shape functions is also discussed in the paper. The new triangular element employs position vectors and slope vectors up to second-order mixed-derivative slope vector. A detailed derivation of the equations of motion of the element is also provided and examples of its numerical simulation and validation presented. 相似文献
13.
14.
G. N. Dudin 《Fluid Dynamics》1982,17(5):693-698
The results are given of the calculation of a three-dimensional boundary layer on a triangular plate of finite length in a regime of strong viscous interaction with an external hypersonic stream for both symmetric flow as well as in the presence of an angle of slip. The influence of the change in the pressure on the trailing edge of the plate on the boundary layer characteristics is investigated.Translated from Izvestiya Akademii Nauk SSSR, Mekhanika Zhidkosti i Gaza, No. 5, pp. 46–52, September–October, 1982. 相似文献
15.
基于整体-局部位移方法,建立了一种高阶剪切变形理论。整体位移部分采用的是Reddy理论的位移模式(1984),局部位移为LIXY等(1997)建立的1,2-3理论的局部函数。这一理论使满足自由表面条件的Red@理论进一步满足层间位移、应力连续,同时有效减少了1,2—3理论的未知数个数。基于此理论深入开展了有限元法研究,建立了满足C^1连续条件的精化三节点三角形单元(每个节点参数为9个)。计算结果表明:建立的精化单元能准确计算整体位移和层间应力。 相似文献
16.
V. N. Vetultskii T. V. Poplavskaya 《Journal of Applied Mechanics and Technical Physics》1989,30(1):71-77
Translated from Zhurnal Prikladnoi Mekhaniki i Tekhnicheskoi Fiziki, No. 1, pp. 75–81, January–February, 1988. 相似文献
17.
振动轮式微机械陀螺动力学方程、振动模态及其灵敏度分析 总被引:4,自引:0,他引:4
介绍了一种新的振动轮式微机机械陀螺仪的结构及工作原理,详细推导了该陀螺的动力学方程,分析了其运动规律,并建立了该陀螺的三维有限元模型,给出了前其四阶模态振型,对灵敏度进行了分析模拟。 相似文献
18.
We consider a natural Lagrangian system on which an additional holonomic rheonomic constraint is imposed; the time dependence is included in this constraint by a parameter performing rapid periodic oscillations. Such a constraint is said to be a vibrating constraint. The equations of motion are obtained for a system with a vibrating constraint in the form of Hamilton’s equations. It is shown that the structure of the Hamiltonian of the system has a special form convenient for deriving the averaged equations. Usage of the averaging method allows us to obtain the limit equations of motion of the system as the frequency of vibrations tends to infinity and to prove the uniform convergence of the solutions of Hamilton’s equations to the solutions of the limit equations on a finite time interval. Some examples are discussed. 相似文献
19.
N. A. Chernyshov A. D. Chernyshov 《Journal of Applied Mechanics and Technical Physics》2001,42(3):510-515
The problem of stationary vibrations of a viscoelastic equilateral triangular plate is treated. The vibrations are caused by the action of a uniformly distributed load which varies harmonically and by the motion of the simply supported boundary of the plate as a rigid body which vibrates at the same frequency. The level lines of the vibration amplitude are studied and the graphs of the amplitude distribution along the height of the triangle are given. 相似文献