Central European Journal of Engineering
2081-9927
1896-1541
Cơ quản chủ quản: N/A
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Các bài báo tiêu biểu
A reliable iterative method for solving the time-dependent singular Emden-Fowler equations
Tập 3 - Trang 99-105 - 2012
Many problems of physical sciences and engineering are modelled by singular boundary value problems. In this paper, the variational iteration method (VIM) is used to study the time-dependent singular Emden-Fowler equations. This method overcomes the difficulties of singularity behavior. The VIM reveals quite a number of features over numerical methods that make it helpful for singular and nonsingu......
The influence of triggers geometry upon the stiffness of cylindrical thin walled tubes
Tập 4 - Trang 101-109 - 2014
Today’s automobile manufacturers are increasingly using lightweight materials to reduce weight; these include plastics, composites, aluminium, magnesium alloys, and also new types of high strength steels. Many of these materials have limited strength or ductility, therefore in many cases the rupture being serious consequences during crashes, underscore Picketta et al. in their studies. Automotive ......
Envisioning engineering education and practice in the coming intelligence convergence era — a complex adaptive systems approach
Tập 3 - Trang 606-619 - 2013
Some of the recent attempts for improving and transforming engineering education are reviewed. The attempts aim at providing the entry level engineers with the skills needed to address the challenges of future large-scale complex systems and projects. Some of the frontier sectors and future challenges for engineers are outlined. The major characteristics of the coming intelligence convergence era ......
Experimental determination of force and displacement of a car suspension
Tập 1 - Trang 279-286 - 2011
In this paper, a dynamical laboratory testing of experimental car body connection with real elastic suspension system (ESS) is described. During the experiment a horizontal force in longitudinal direction was applied, in order to simulate an acceleration and deceleration regime of a vehicle. The experiment was carried out on the example of two car bodies, with identical geometric behavior but impl......
Controlling the magnetorheological suspension of a vehicle seat including the biomechanics of the driver
Tập 2 - Trang 264-278 - 2012
This paper presents an original approach to the problem of controlling a magnetorheological suspension of a driver’s seat for optimal reduction of whole-body vibration. The concept consists in taking into consideration the individual personal features (biomechanical parameters) of the driver in the control process of a MR damper by using human generated signals. The proposed algorithm enables the ......
On the critical forcing amplitude of forced nonlinear oscillators
Tập 3 - Trang 764-770 - 2013
The steady-state response of forced single degree-of-freedom weakly nonlinear oscillators under primary resonance conditions can exhibit saddle-node bifurcations, jump and hysteresis phenomena, if the amplitude of the excitation exceeds a certain value. This critical value of excitation amplitude or critical forcing amplitude plays an important role in determining the occurrence of saddle-node bif......
Hydrodynamics in a vessel stirred by simple and double helical ribbon impellers
Tập 3 - Trang 87-98 - 2012
The present paper treats the agitation of shear thinning fluids in a cylindrical unbaffled vessel with a flat-bottom. Two kinds of impellers have been used: simple and double helical ribbons. This work is achieved with the help of CFD package (CFX-12.0), which is based on the finite volume method to solve the continuity and momentum equations. The effect of impeller rotational speed, fluid rheolog......
Research of some operating parameters and the emissions level variation in a spark ignited engine through on-board investigation methods in different loading conditions
Tập 4 - Trang 192-208 - 2014
The present paper shows research made on a spark ignited engine with port fuel injection in different operation conditions in order to improve the comprehension about the cold start sequence, acceleration when changing the gear ratios, quality of combustion process and also any measures to be taken for pollutant reduction in such cases. The engineering endeavor encompasses the pollutants investiga......
Hardware-in-the-loop implementation for an active heave compensated drawworks
Tập 2 - Trang 201-211 - 2012
This paper presents the setup and running of a hardware-in-loop (HIL) simulation for an active heave compensated (AHC) draw-works. A simulation model of the draw-works is executed on a PC to simulate the AHC draw-works with a physical PLC. The PLC (ET200S) is configured with a controller architecture that regulates the motor angular displacement and velocity through actuation of the servo valves. ......
Constructal design applied to the elastic buckling of thin plates with holes
Tập 3 - Trang 475-483 - 2014
Elastic buckling is an instability phenomenon that can occur if a slender and thin plate is subjected to axial compression. An important characteristic of the buckling is that the instability may occur at a stress level that is substantially lower than the material yield strength. Besides, the presence of holes in structural plate elements is common. However these perforations cause a redistributi......