2/17/2023 0 Comments Panavia tornado x plane crack![]() Although the research works for the fatigue failures in metallic structures have been continued for more than 170 years, unforeseen fatigue failures are still occurring in the full-scale fatigue validation tests and aircraft operations. “Analysis, supported by tests” can be concluded as the baseline of the airworthiness regulations. Requirements for Durability and Damage Tolerance designs in current airworthiness regulations are an accumulation result of lessons learnt from various aircraft accidents. This article started with a review on the evolutionary history of airworthiness regulations. In addition, motion control at changeable airflow is optimized by selecting the blade orientation and corresponding adjustment of generator. Optimization of system parameters is performed, using a generated power as criterion. Dynamics of the system due to the action of air flow is simulated with computer program Mathcad. On the base of such separation, a differential equation of motion for the entire conveyor system with one degree of freedom is obtained. To analyse blade interaction with air flow, a superposition principle is applied, in which the fast chaotic motion of air particles (Brownian motion) is separated from the slow flow motion with the given average velocity. The conveyor system has a built-in energy generator. Therefore, air flow kinetic energy is transformed into translation motion of flat blades. The blades are mounted on a conveyor belt and have an opportunity to move together with the belt in one straight line direction. ![]() ![]() ![]() The proposed design offers a closed-shaped flattened conveyor equipped with several identical flat-shaped blades. This paper deals with a dual design device for wind energy production, in which the movement of the blade consists of several stages, that is, two stages of rotation about two fixed axes and two stages of the blades straight translation movement. ![]()
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