Method of Optimization Design of Permanent Magnet Retarder

This paper introduced the method of multidisciplinary design optimization. The conceptual model of permanent magnet retarder was developed to maximize the brake torque of the permanent magnet retarder. The influences of magnetic field parameters, structural design parameters, rotor parameters and permanent magnet temperature parameters on the behaviors performance of the permanent magnet retarder were discussed. The design variables included the radial width and the axis length of permanent magnet, the number of permanent magnet, the radius of rotor, the thickness of rotor, and the air gas. The multidisciplinary design optimization in this paper is an effective method for the global design optimization of the permanent magnet retarder.

An Approach for Structural-Acoustic Optimization of Ribbed Panels Using Component Mode Synthesis

Component mode synthesis (CMS) is an approach used to couple dynamics of complex structures using modes of individual components. A CMS approach is developed to determine the response of a ribbed panel based on the individual rib and plate modes. The CMS method allows for rapid evaluation of noise-control designs as component modes need to be solved only once. Since efficient evaluation is required for global design optimization procedures, the CMS approach can be well suited in optimization problems. A simple structural-acoustic optimization problem was created to demonstrate the utility of the formulation by finding the optimal rib location and material to reduce sound radiation for a point-driven plate. Several parameters of the optimization algorithm are varied to test convergence speed and accuracy.