Unique analytical model improves understanding of violent dynamic behaviour of advanced oilfield rotary steerable drilling systems

2012 ◽  
pp. 591-600
Author(s):  
L A Lines ◽  
D R H Stroud ◽  
D J Minett-Smith ◽  
J. Pagett
Keyword(s):  
Analytical Model ◽  
Dynamic Behaviour

Performances Analysis of a Linear Motor for Sliding Door Application

2017 ◽  
Vol 8 (3) ◽  
pp. 1139
Author(s):  
Aymen Lachheb ◽  
Jalel Khediri ◽  
Lilia El Amraoui
Keyword(s):  
Analytical Model ◽  
Dynamic Behaviour ◽  
Switched Reluctance Motor ◽  
Linear Motor ◽  
Open Loop ◽  
Switched Reluctance ◽  
Smooth Motion ◽  
Reluctance Motor ◽  
Linear Switched Reluctance Motor

The present work deals to investigate the performance of linear switched reluctance motor designed for a sliding door application. The objective of this paper is to develop an analytical model in order to predict the dynamic behaviour of the studied motor. Firstly, the characteristics of the proposed motor in open loop operation was computed.Secondly, the effect of the load on the response of the motor was investigated. In this context, a two technoque in open loop were adopted to solve the error positioning with load and to damp the oscillation observed in the characteristics of the motor in order to obtain a smooth motion.

Analytical model of the dynamic behaviour of CFRP plates subjected to low-velocity impacts

2018 ◽  
Vol 142 ◽  
pp. 47-55 ◽  
Author(s):  
M. Salvetti ◽  
A. Gilioli ◽  
C. Sbarufatti ◽  
A. Manes ◽  
M. Giglio
Keyword(s):  
Analytical Model ◽  
Dynamic Behaviour ◽  
Low Velocity

Dynamic Analysis of a Stone Column Excited by a Sine Wave Ground Motion

1991 ◽  
Vol 44 (11S) ◽  
pp. S246-S255 ◽  
Author(s):  
A. Sinopoli
Keyword(s):  
Stability Analysis ◽  
Dynamic Analysis ◽  
Ground Motion ◽  
Analytical Model ◽  
Dynamic Behaviour ◽  
Sine Wave ◽  
Stone Column ◽  
Hill’S Equations

The aim of this work is the identification of an analytical model to study the dynamic behaviour of a stone column, either monolithic or multiblock, excited by a sine wave ground motion. It is demonstrated that the motion can be described by a family of forced damped Hill’s equations. The operative limits of the model in relation to the problem are shown and discussed; in fact, the system exibihits some kind of unpredictability. In any case, criteria for a stability analysis of the motions are given.

Numerical Simulation of SHPB Experiment on Dynamic Behaviour of Ceramic Particle Reinforced MMCs

2006 ◽  
Vol 326-328 ◽  
pp. 1539-1542 ◽  
Author(s):  
Li Sheng Liu ◽  
Dong Feng Cao ◽  
Jiang Tao Zhang ◽  
Qing Jie Zhang
Keyword(s):  
Numerical Simulation ◽  
Numerical Experiment ◽  
Numerical Method ◽  
Metal Matrix Composites ◽  
Analytical Model ◽  
Metal Matrix ◽  
Dynamic Behaviour ◽  
Damage Model ◽  
Ceramic Particle ◽  
Matrix Composites

The dynamic behaviour of ceramic particle reinforced metal matrix composites (MMCs) is a key to its application. In this paper, the computational micro-mechanics method (CMM) is used to simulate SHPB experiment of MMCs. The numerical SHPB’s specimen of MMCs is firstly generated by CMM. Then, for verifying the correction of numerical experiment, the Al2O3/6061- T6Al composite is used to carry out numerical experiment, and the Johnson-Holmquist (JH-2) damage model is used to describe the ceramic mechanics behaviour, and a comparison between this numerical method and Unit Cell analytical model is carried out. Lastly, the dynamic behaviour of T6061Al/Al2O3 is investigated by this method.

The mechanics of an oscillatory rate gyroscope with piezoelectric film actuation and sensing

2001 ◽  
Vol 215 (10) ◽  
pp. 1211-1221 ◽  
Author(s):  
C M Royle ◽  
C H J Fox
Keyword(s):  
Thin Film ◽  
Analytical Model ◽  
Lead Zirconate Titanate ◽  
Dynamic Behaviour ◽  
Low Cost ◽  
Lead Zirconate ◽  
Vehicle Navigation ◽  
Piezoelectric Film ◽  
Basic Performance ◽  
Safety Systems

Many applications exist for low-cost, miniature rate gyroscopes. These are primarily in the automotive field, and relate to safety systems or vehicle navigation. This paper presents an analysis of the mechanics of an oscillatory rate gyroscope that is actuated and sensed using thin-film lead-zirconate-titanate (PZT), and is suitable for manufacture using recently developed micromachining techniques. An analytical model of the device, combining the electromechanical behaviour of PZT and the dynamic behaviour of the mechanical structure, has been developed. This model is used to investigate the basic performance of a gyro of realistic dimensions, thus demonstrating the potential feasibility of such a device.

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