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Large thin-walled parts are widely used in aerospace. Due to its low rigidity, force- and thermal-induced cutting deformation immediately affects the dimensional accuracy of machined parts. Multilayer milling strategy is usually utilized due to its low rigidity, which results in reduction of machining efficiency. In this work, a typical large thin-walled part, tank bottom of the rocket, is selected...
Galloping of an iced transmission line is characterized by high amplitude, low frequency, self-excited vibration produced by a steady side wind. It is a dangerous phenomenon that seriously threatens the security of power systems. In this paper, the finite element method is utilized and one kind of point element having concentrated mass is used to simulate the inertia and eccentricity of the ice which...
Mechanical galloping of overhead power transmission lines may cause flashover between lines and damage of insulator and tower. Existing models of galloping are not complete to simulate the galloping of three dimensional vibration coupling. In this paper, a three-degree of freedom model is suggested to account for the influences of environmental conditions, geometrical configurations and movement coupling...
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