Reproduction of an Actual Transport Packaging Damage Based on Weighted Gaussians Decomposition

Abstract

Goods transportation across the world is composed of a multitude of phases. These phases are mechanical stresses sources which can damage or destruct the product. To avoid these destructions, it is necessary to simulate the transport in laboratory. Regarding the vibrations, their simulations are performed using a vibration table. These tables are usually controlled from PSD and generate a gaussian acceleration levels signal. However, actual transportation generates ungaussian acceleration levels signal. These actual distributions of accelerations can be decomposed into many weighted gaussian distributions. These different gaussian distributions are associated to several PSD levels. By knowing the adapted Basquin coefficient and the adapted constant of a system made to measure the damage during the actual transport, it is possible to estimate the lifetime of a packaging system and its damage rate from a PSD. However, this damage estimation is adapted to a gaussian distribution usually generated on a vibration table. In this work, the damage calculation is applied to the defined PSDs obtained from a weighted gaussian levels distribution. The total damage generated on a packaging system by the different levels of PSDs are compared to the total damage of an actual transport.