Abstract
An important concern in gear design is to reduce the dynamic load and noise of gear systems. It has been found that the noise generated from gearing is basically due to gearbox vibration excited by the dynamic load. Since one of the situations that demand high performance is the high rotational speeds, there is a need to understand the dynamic behavior of the gears at such speeds. Such knowledge would shed light on detrimental characteristics like dynamic loads and vibrations. An efficient way in performing studies on the dynamic behavior of gears is using computer aided analysis on numerical models. In this paper, a developed computer program is introduced to analyze dynamic behavior of spur gears with asymmetric teeth that have a potential use for higher performance in wind turbine gearboxes. This program can be used to compare conventional spur gears with symmetric teeth and spur gears with asymmetric teeth. By using this program, gear designers can design a gear pair and obtain results, e.g dynamic Load, transmitted torque, static transmission error, and frequency spectra of static transmission error etc., just by pressing a command button.
Highlights
A developed computer program is introduced to analyze dynamic behavior of spur gears with asymmetric teeth that have a potential use for higher performance in wind turbine gearboxes
Gear dynamics has been a subject of intense interest to the gearing area during the last few decades dynamic loads and vibration are a major concern for gear drives at high speeds
Simulation of meshing of gear drives performed by application of tooth contact analysis and experimental tests of gear drives have confirmed that transmission errors (TE) are the prime cause of noise and vibrations of the gear drives [1]
Summary
Gear dynamics has been a subject of intense interest to the gearing area during the last few decades dynamic loads and vibration are a major concern for gear drives at high speeds. A numerical approach for the equations of motion that contain the excitation terms due to errors and periodic variation of the mesh stiffness was developed and presented This method was adapted and employed by several researchers [7,8,9,10,11,12,13,14] to calculate the dynamic contact load or the torsional response, depending on different gear parameters, i.e. tooth errors, addendum modification, mesh stiffness, lubrication, damping factor, gear contact factor, and friction coefficient. A large number of studies have been performed over the last two decades to assess whether asymmetric gears are an alternative to conventional gears in applications requiring high performance In these studies, some standards (e.g. ISO 6336 and DIN 3990), analytical methods (e.g. the Direct Gear Design method and the tooth contact analysis), and numerical methods The objective of this paper is to introduce a developed MATLAB-based virtual tool called DYNAMIC and to demonstrate its capabilities
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