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A. M. El-Naggar

Publications (3)

Subharmonic Solutions of Governed MEMS System Subjected to Parametric and External Excitations

A. M. El-Naggar, K. M. Khalil & A. M. Omran · Asian Research Journal of Mathematics · 2017

Subharmonic periodic solutions of order (1/2 ,1/4) to a weakly second order ordinary differential equation which governed the motion of a micro-dynamical system are studied analytically. Applying the method of multiple scales, we derive the modulation equation in the amplitude an...

Open access Research Article 10.9734/ARJOM/2017/32008

Harmonic and Sub-Harmonic Periodic Solutions (1/2, 1/3) of Generalized Mathieu-Van der Pol-Duffing Equations

A. M. El-Naggar, K. M. Khalil & A. M. Omran · Journal of Scientific Research and Reports · 2017

The frequency-locking area of harmonic and subharmonic ( 1/2, 1/3 ) solutions in a fast harmonic excitation Mathieu-Van der PolDuffing equation is studied. A perturbation technique is then performed on the slow dynamic near the harmonic and subharmonic ( 1/2, 1/3 ) solutions, to...

Open access Research Article 10.9734/JSRR/2017/32122

Analytical Solutions of Strongly Non-linear Problems by the Iteration Perturbation Method

A. M. El-Naggar & G. M. Ismail · Journal of Scientific Research and Reports · 2014

This paper applies modified He's iteration perturbation method to study periodic solutions of strongly nonlinear oscillators. Some examples are given to illustrate the effectiveness and convenience of the method. The results are compared with the numerical solution and the compar...

Open access Research Article 10.9734/JSRR/2015/14364