...Su Yong; Gong Wu-Qi Purpose Abnormal vibrations often occur in the liquid oxygen kerosene transmission pipelines of rocket engines, which seriously threaten their safety. Improper handling can result in failed rocket launches and significant economic losses. Therefore, this paper aims to examine...

...Hatice Cansu Ayaz Ümütlü; Zeki Kiral; Ziya Haktan Karadeniz Purpose The purpose of this study is to identify the possible relation between the vibration and the stall by using the vibration response of the airfoil. For this purpose, the root mean square values of the acceleration signals...

...Supen Kumar Sah; Anup Ghosh Purpose The purpose of this paper is to carry out free vibration and buckling analysis of functionally graded material (FGM) plate. Design/methodology/approach Equilibrium and stability equations of FGM rectangular plate under different boundary conditions...

...Saijal Kizhakke Kodakkattu; Prabhakaran Nair; Joy M.L. Purpose The purpose of this study is to obtain optimum locations, peak deflection and chord of the twin trailing-edge flaps and optimum torsional stiffness of the helicopter rotor blade to minimize the vibration in the rotor hub with minimum...

... and to vibration boundary conditions, three levels of modeling have been realized. Findings – This paper shows that the vibrations induced by aircraft environment are not design drivers for conventional hydraulic actuators but can be an issue for new electromechanical actuators. The weight of the latter can...

...Shuai Na; Guo-an Tang; Li-fen Chen Purpose – Orbital maneuver of the spacecraft can cause large-amplitude vibration of its flexible solar array, which leads to large dynamic stress and a risk of structural failure and fatigue failure. This paper aims to provide a method to reduce such vibration...

... such as MSC Nastran and experimental modal parameters (such as mode shapes, natural frequencies and damping) from ground vibration tests. Design/methodology/approach A finite element model with nodes representing the test points on the aircraft is created with appropriate boundary constraints. A direct...

...Cem Onat; Melin Şahin; Yavuz Yaman Purpose The purpose of this paper is to detail the design of a fractional controller which was developed for the suppression of the flexural vibrations of the first mode of a smart beam. Design/methodology/approach During the design of the fractional...

...Song Li; Bo Fang; Tianzhi Yang; Yewei Zhang; Lijun Tan; Wenhu Huang Purpose The purpose of this paper is to analyze a new, whole‐spacecraft isolator and its performance of vibration isolation, which has been designed to ensure spacecraft safety at the launching stage. Design/methodology...

... that the destabilizing effect of internal rotor damping play a key role in the original design. In the modified design, the stability margins are enhanced and the vibration response levels are minimized. The onset speed of instability increases in original design and decreases in modified design as the effects of seal...

...Haydar Uyanık; Zahit Mecitoğlu Purpose The purpose of this paper is to develop a structural vibration control system by using a state observer which estimates system states using displacements measured from sensors. Design/methodology/approach Friedlander's exponential decay function is used...

..., and the change is more pronounced in the higher modes. The interest of practicing scientist or engineer in plate vibration problems is normally shape control or limitation of vibration amplitudes. The present study demonstrates that it is possible to affect the eigenfrequencies and mode shapes of a plate...

...Namita Nanda; J.N. Bandyopadhyay Purpose To investigate the large amplitude free flexural vibration of doubly curved shallow shells in the presence of cutouts. Design/methodology/approach Finite element model using an eight‐noded C⁰ continuity, isoparametric quadrilateral...

...Qinglei Hu Purpose To provide an approach to active vibration reduction of flexible spacecraft actuated by on‐off thrusters during attitude control for spacecraft designers, which can help them analysis and design the attitude control system. Design/methodology/approach The new approach...

...Amit Karmakar; Haraprasad Roy; Kikuo Kishimoto Purpose To investigate the effects of delamination on free vibration characteristics of graphite‐epoxy composite pretwisted cylindrical shallow shells of various stacking sequences considering length of delamination as a parameter. Design...

...Sule Kapkin; Erol Uzal Purpose Investigate the vibrations of the walls of a rectangular channel through which fluid flows. Design/methodology/approach Analytical solution of linearised compressible potential flow equations for the fluid coupled with the plate vibration equations for two...

...Abdurrahman Hacioĝlu; İbrahim Özkol We introduce the Vibration concept for real coded Genetic Algorithm and its implementation to inverse airfoil design, which decreases the number of CFD calculations. This concept assures efficient diversity in the population and consequently gives faster solution...

... © MCB UP Limited 2001 --> Ultra Electronics Noise levels Vibration Ultra Electronics certify retrofit Dash-8 Series 300 noise and vibration suppression system Keywords: Ultra Electronics, Noise levels, Vibration Ultra Electronics Ltd, Noise and Vibration Systems...

...Hai‐Yan Li; Xue‐Ren Zhang; Xiao‐Jun Yan; Jing‐Xu Nie A new reverse educing method (REM) is presented to estimate the vibrational stress on rotating aeroengine blades from the actual fracture section. This method does not conform to the traditional calculating method, but involves the reverse...

...Terry Ford © MCB UP Limited 2000 --> Vibration Aircraft Combating vibration Keywords: Vibration, Aircraft For many years the detection and reduction of the effects of vibration in aerospace structures have occupied researchers and engineers and, as technology has...