In this article, an efficient methodology is presented to optimize the topology of structural systems under transient loads. Equivalent static loads concept is used to deal with transient loads and to solve an alternate quasi-static optimization problem. The maximum strain energy of the structure under the transient load during the loading interval is used as objective function. The objective f...

Abstract Reducing the radiated noise of a gearbox is difficult problem in aviation, navigation, machinery, and other fields. Structural improvement main means reduction for gearbox, it realized primarily through contribution analysis structure optimization. However, these approaches have certain limitations. In this study, low-noise design method that combines two proposed, experimental verific...

Abstract: This paper studies the dynamic response of a wind turbine gearbox under different excitation conditions. The proposed 4 degree-of-freedom (DOF) dynamic model takes into account the key factors such as the time-varying mesh stiffness, bearing stiffness, damping, static transmission error and gear backlash. Both the external excitation due to wind and the internal excitation due to the ...

Optimization of the volume/weight in the gear train is of great importance for industries and researchers. In this paper, using the particle swarm optimization algorithm, a general gear train is optimized. The main idea is to optimize the volume/weight of the gearbox in 3 directions. To this end, the optimization process based on the PSO algorithm occurs along the height, length, and width of t...

This paper presents the optimization of lubrication method a helical bevel gearbox, which is part pickling line. The first gear stage this gearbox showed frequent failures. gearing and bearings were damaged. Damage analysis was performed, based on change in bearing proposed. In case, original transmission lubricated by dip lubrication. wheel insufficiently submerged below lubricating oil level....

For any graph G with fixed boundary there exists a layout in the plane, which minimizes the maximum Euclidean distance of any node to its neighbors. This layout balances the length of the graph edges and is therefore called a (length-) balanced layout of G. Furthermore the existence of a unique optimal balanced layout L with the following properties is proved: (i) L is the minimal element of an...

This paper is on the assessment for Mode III crack propagation under influence of primarily Rolling Contact Fatigue (RCF) in integrated thin-rimmed planetary gears and its bearings, design development a test gearbox full-scale testing such 3-gear train planet layout. It response to ‘Innovative DEsign Reliable PLANEt bearings’ (IDERPLANE) research project which will address concern high RCF gear...

Preliminary notes This paper in its theoretical part presents basic and advanced methods of Rapid Prototyping (RP) technology with a special focus on Fused Deposition Modelling (FDM) method used by authors on Faculty of Manufacturing Technologies of Technical University of Košice with a seat in Prešov (Slovakia). Principles of FDM technology and materials used for production of models and produ...

The gearbox is a complicated rotating machinery equipment, in order to realize the gearbox fault early detection and prevention, it is the key to carry out the online diagnosis. This paper used the adaptive variable step-length natural gradient blind source separation algorithm to realize the helicopter gearbox meshing vibration signal and fault vibration signal effective separation. Through th...

Gearbox is an important mechanical device to transmit power. In order to ensure the normal operation of gearbox under the condition of top load, high efficiency and high precision, it’s necessary to extract fault feature information using signal processing method and to further analyze and research gearbox fault. In the paper an improved de-noising method based on de-noising of singular value d...