FEM analysis on collapse of UAV from different heights
Gabriel Valentin Gheorghe, I. Găgeanu, Catalin Persu, Dan Cujbescu, Gheorghe Voicu · Engineering for Rural Development · 2021
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 -1 oney 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 analysisexplicit 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.