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This paper proposes a framework for the design of a coreless permanent magnet (PM) machine for a 100 kWh shaft-less high strength steel flywheel energy storage system (SHFES). The PM motor/generator is designed to meet the required specs in terms of torque-speed and power-speed characteristics given by the application. The design challenges of a motor/generator for this architecture include: the poor...
In this work, we investigate asymmetric acoustic transmission (AAT) in dual-metal grating structures composed of two gratings with different structures. The calculated results show that AAT can be obtained in both directions. By modulating the structural parameters, the transmittance approaches to 0 and 0.63 in the two opposite directions, respectively, because transmission suppression occurs in one...
Dynamic meshing of Spiral bevel gears is a complicated geometric, material, and contact non-linear problem. The finite element method (FEM) is a common and effective approach and direct constraint method is highly advantageous to solve contact non-linear problems. In this paper, a three-dimensional nonlinear contact analysis model for a pair of spiral bevel gears was established. Based on this model,...
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