Structure Simulation and Optimization of Vehicle-Borne Radar Parallelogram Linkage Frog Leg

Abstract

In view of the insufficient bearing capacity of vehicle-borne radar parallelogram linkage frog leg, basic structure and mechanism theory of frog leg is introduced, key problem and fake boundary conditions used in early period frog leg design are pointed out. The maximum load under typical case is obtained by analyzing the frog leg systematically, bearing capacity is computed by FEA, validated and modified combing with stress test. Based on it, topological optimization and local shape optimization are done on the bearing hook and weak portion of the frog leg, and bearing capacity of the frog leg is compared before and after optimization. Simulation result shows that frog leg bearing capacity enhances 60%, with size and weight of the whole frog leg little changed, and the maximum stress position on welded structure transfers from the dangerous weld area to the bracket body itself, enhances the radar system safety effectively.