The effect of gear contact state change due to shaft misalignment on meshing stiffness is usually neglected in the traditional calculation model with error, further influence mechanism dynamic characteristics also unclear. To address these shortcomings, a new mesh misaligned considering effects tooth proposed by combining improved loaded analysis (LTCA) model. Then changes aroused excitation ar...

Abstract The rotational angular velocity of fragments under the driver explosive products makes constantly flip during trajectory, which has a huge effect on decay fragments. In order to more accurately calculate residual flight, it is necessary study Based paper target system, an experimental method for measuring proposed. By using ANSYS/LSDYNA finite element software, preformed explosion stud...

We compare the long-time error bounds and spatial resolution of finite difference methods with different discretizations for Dirac equation small electromagnetic potentials characterized by ??(0,1] a dimensionless parameter. begin simple widely used time domain (FDTD) methods, establish rigorous them, which are valid up to at O(1/?). In estimates, we pay particular attention how errors depend e...

This paper illustrates the use of the envelope theorem for the geometric design of a cycloidal speed reducer. Specifically, it proposes two designs for a mathematical model with tooth differences: a pin wheel epitrochoid meshing which is a cycloidal wheel (internal rotor) profile equidistant to an epitrochoid (or extended epicycloid) curve and a cycloida! wheel is generated by a pin wheel (exte...

Abstract. The cooper tool is a new approach to automation of hexahedral meshing (or a wedge/ hexahedral element mix if desired) for a general subset of geometries. The tool recognizes applicable geometries and decomposes such into logically single axis swept subvolumes (barrels) with barrel caps bounding the decomposed pieces. It then enforces strict compatibility constraints by imprinting, int...

Developments in the field of parametrization-based quad mesh generation on surfaces have been impactful over past decade. In this context, an important advance has replacement error-prone rounding integer-grid maps, by robust quantization methods. parallel, hex for volumes advanced. volumetric however, state-of-the-art still relies fragile rounding, not rarely producing defective meshes, especi...