March 2011
Analytic prognostic for petrochemical pipelines
Pipelines tubes are part of vital mechanical systems largely used in petrochemical industries. They serve to transport natural gases or liquids. They are cylindrical tubes and are submitted to the risks of corrosion due to high PH concentrations of the transported liquids in addition to fatigue cracks due to the alternation of pressure-depression of gas along the time, initiating therefore in the tubes’...
March 2011
An experimental investigation of noise emission from a vehicle gearbox system
Nowadays, one of the most valuable criteria of vehicle quality assessment is based on acoustic emission levels: A car is judged comfortable Depending on the noise level transmitted inside. Consequently, there is a general attention to the design criteria aimed at improving the structural-acoustic behavior, to comply with the increasingly restrictive ergonomic standard. The aim of this paper is to study...
March 2011
Kinematics and kinetic analysis of the slider-crank mechanism in otto linear four cylinder Z24 engine
Nissan Z24 is one of the numerous vehicles in Iran. MegaMotor's reports show high rate damaging in the crankshaft and connecting rod of this engine vehicle. It is necessary to carry out a complete research about slider-crank mechanism because of high expensive repairs and replacement of these parts and their reverse effects on the other parts such as cylinder block and piston. Results of initial...
March 2011
Stick-slip detection through measurement of near field noise
The paper presents an experimental investigation to recognize the occurrence of the stick-slip phenomenon. As a trial to detect and evaluate this phenomenon, a pin on disk test rig is presented. The test rig consists of two separate blocks to ensure that the vibration of the elastic disk and emitted noise are completely adverted to friction between the moving pin and stationary steel disk. The occurrence of...
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