Vietnam Journal of Mechanics

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The theoretical model of interaction between the baroclinic boundary layers of atmosphere and ocean
Vietnam Journal of Mechanics - Tập 2 Số 1 - 1980
Presenting the theoretical model of the atmospheric and oceanic baroclinic boundary layers by interaction.Baroclinic effects of two boundary layers are described by the horizontal gradients of air temperature and water density in the equations of motion.The formulas computing the characteristics of the oceanic atmospheric baroclinic boundary layers were obtained.The above 1heoretical model is the ...... hiện toàn bộ
Tự động hóa thiết kế các cơ sở đồ môđun truyền dẫn khí nén
Vietnam Journal of Mechanics - Tập 13 Số 1 - 1991
None
Nonlinear analysis of buckling and postbuckling for axially compressed functionally graded cylindrical panels with the Poisson's ratio varying smoothly along the thickness
Vietnam Journal of Mechanics - Tập 34 Số 1 - 2012
Le Kha Hoa, Dao Van Dung
In this paper an approximate analytical solution to analyze the nonlinear buckling and postbuckling behavior of imperfect functionally graded panels with the Poisson's ratio also varying smoothly along the thickness is investigated. Based on the classical shell theory and von Karman's assumption of kinematic nonlinearity and applying Galerkin procedure, the equations for finding critical loads and...... hiện toàn bộ
#Nonlinear #postbuckling #functionally graded materials #cylindrical panel
Calculation of turbulent diffusion jets under effects of gravity and moving surrounding air
Vietnam Journal of Mechanics - Tập 23 Số 2 - 2001
The basis theory for the turbulent diffusion of jet and flame has been presented previously [1, 2]. But that one applies only in quiet surrounding air with the effects of buoyancy neglected. In the present paper, the theory is developed further by establishing an integral model for a jet in more general conditions with variable inclined angles, under effects of gravity and surrounding air velocity...... hiện toàn bộ
Ổn định của vỏ trụ trực hướng đàn nhớt và đàn hồi
Vietnam Journal of Mechanics - Tập 10 Số 2 - 1988
None
Về một giả thiết va chạm
Vietnam Journal of Mechanics - Tập 11 Số 3 - 1989
None
Application of the curvature smoothing technique for four-node quadrilateral Reissner-Mindlin plate element
Vietnam Journal of Mechanics - Tập 29 Số 1 - 2007
Nguyen Xuan Hung, Ngo Thanh Phong
A quadrilateral element with smoothed curvatures for Reissner-Mindlin structure plates is proposed. A curvature matrix at an arbitrary point is normalized by a non-local approximation over a smoothing function. By choosing a constant smoothed function and applying the divergence theorem, the bending stiffness matrix calculated on boundaries of smoothing elements (smoothing cells) instead of on the...... hiện toàn bộ
The influence of foundation mass on dynamic response of track-vehicle interaction
Vietnam Journal of Mechanics - Tập 41 Số 1 - 2019
Phuoc T. Nguyen, Trung D. Pham, Hoa P. Hoang
The influence of foundation mass on the dynamic response of track-vehicle interaction is studied in this paper. The moving vehicle is modeled as a two-axle mass-spring-damper four-degrees-of-freedom system. A new dynamic foundation model, called "Dynamic foundation model" including linear elastic spring, shear layer, viscous damping and foundation mass parameter, is used to analyze the dynamic res...... hiện toàn bộ
#Winkler foundation #two-parameter foundation #dynamic foundation model #foundation mass #track-vehicle interaction
Control of a pointer located on a vibrating system
Vietnam Journal of Mechanics - Tập 23 Số 1 - 2001
In this paper, the problem of controlling a bar supporting, at one end a pointer and hinged, at the other end, to a structural system vibrating under any extern excitation is investigated. The problem is to maintain the pointer toward the target with a prescribed tolerance. Emphasis is put on the uncertainty, which characterizes the problem and a simple fuzzy controller approach is discussed. Some...... hiện toàn bộ
#Active control #fuzzy control #linear electromagnetic motor #pointer
Dynamic analysis of prestressed Bernoulli beams resting on two-parameter foundation under moving harmonic load
Vietnam Journal of Mechanics - Tập 28 Số 3 - 2006
Nguyen Dinh Kien, Bui Thanh Hai
This paper describes the dynamic analysis of prestressed Bernoulli beams resting on a two-parameter elastic foundation under a moving harmonic load by the finite element method. Using the cubic Hermitian polynomials as interpolation functions for the deflection, the stiffness of the Bernoulli beam element augmented by that of the foundation support and prestress is formulated. The nodal load vecto...... hiện toàn bộ
Tổng số: 1,046   
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