This paper describes third aircraft model with 2 degrees of freedom. The aim of this study is to develop a mathematical model for investigation of adoptable landing gear vibration behavior and to design Proportional Integration Derivative (PID) classical techniques for control of active hydraulic nonlinear actuator. The parameters of controller and suspension system are adjusted according to be...

In this paper, crashworthiness characteristics of conical steel tubes stiffened by annular rings and rigid polyurethane foam are investigated. For this purpose, wide circumferential rings are created from the outer surface of the conical tube at some determined areas along tube length. In fact, this method divides a long conical tube into several tubes of shorter length. When this structure is ...

für Naturforschung in cooperation with the Max Planck Society for the Advancement of Science under a Creative Commons Attribution 4.0 International License. Dieses Werk wurde im Jahr 2013 vom Verlag Zeitschrift für Naturforschung in Zusammenarbeit mit der Max-Planck-Gesellschaft zur Förderung der Wissenschaften e.V. digitalisiert und unter folgender Lizenz veröffentlicht: Creative Commons Namen...

Articular cartilage is a very complex composite material, overlaying diarthrodial joints surfaces (e.g. knee, shoulder, temporomandibular, etc.), holding load bearing, lubrication and shock absorbing capabilities [1]. Characterization of articular cartilage material properties is necessary to study its mechanical response and consequently its impact on joints biomechanics [2]. Furthermore, the ...

We are in the process of developing multifunctional load-bearing structural batteries for electric vehicles (EVs). The battery system not only stores electricity for vehicle propulsion, but also reduces impact forces for the EVs getting into crash loading conditions functioning as a shock absorber, thus decreasing the impact shock to the vehicle occupants for increased safety. Our research focu...

This paper deals with the study and comparison of passive and active landing gear system of  the aircraft and dynamic responses due to runway irregularities while the aircraft is taxying. The dynamic load and vibration caused by the unevenness of runway will result in airframe fatigue, discomfort of passengers and the reduction of the pilot’s ability to control the aircraft. One of the objectiv...

This paper presents a mathematical model of elastic vibrations arising from shock interaction in four-body system. The resulting has two applications: the study linear and nonlinear interaction. body is presented analytical form. In transition to interaction, it difficult represent approximation. application numerical algorithms made possible obtain solution problem with specified accuracy suff...

Abstract The local structure of the cylindrical shell produces plastic deformation under near-field underwater explosion load, based on fact that ring rib is strong support reinforced plate, this paper simplifies model into a rigid slatted beam at both ends, and lists equations beams action shock wave bubble pulsation load. This equation takes initial damage caused by account, compares calculat...