Fem analysis on collapse of uav from different heights

Abstract

The FEM analysis in SolidWorks Simulation will present the study of drop tests evaluating the effect of the impact of a part or an assembly with a rigid or flexible planar surface. The program calculates impact and gravity loads automatically. No other loads or restraints are allowed. The program solves a dynamic problem as a function of time. The general equation of motion is: FI(t) + FD(t) + FE(t) = R(t), where FI(t) are the inertia forces, FD(t) are the damping forces, and FE(t) are the elastic forces. All of these forces are time-dependent. Increased requirements for reliability and safety, included in contemporary standards and norms, have a high impact over new product development. New numerical techniques based on virtual prototyping technology facilitate improving the product development cycle, resulting in reduced time·m-1oney spent for this stage, as well as increased knowledge about certain failure mechanisms. The so-called “drop test” has become nearly a “must” step in the development of any human operated product. This study aims to demonstrate the dynamic behaviour assessment of a structure under impact loads, based on virtual prototyping using a typical nonlinear analysis - explicit dynamics. Different height and drop orientations were analyzed and critical load cases and design weaknesses have been found. Design modifications have been proposed, based on detailed analyses results review.