Study of the Nonlinear Dropping Shock Response of Expanded Foam Packaging System

Table 1

Comparison of the VIM method with the numerical method by Runge-Kutta method.

Parameters	ΩVIM	Ωnum	Error, %
𝜆1=0.5
𝜆2=2,𝜆3=5	1.4434	1.4742	2.089268756
𝜆2=2,𝜆3=10	1.4995	1.5458	2.995212835
𝜆2=5,𝜆3=5	1.8921	1.9037	0.609339707
𝜆2=5,𝜆3=20	1.9699	2.0103	2.009650301
𝜆1=1
𝜆2=2,𝜆3=5	1.9350	2.0761	6.796397091
𝜆2=2,𝜆3=10	2.0741	2.2712	8.678231772
𝜆2=5,𝜆3=5	2.5634	2.6110	1.8230563
𝜆2=5,𝜆3=20	2.7688	2.8965	4.408769204
𝜆1=2
𝜆2=2,𝜆3=5	2.7222	3.2654	16.63502174
𝜆2=2,𝜆3=10	3.0180	3.6363	17.00354756
𝜆2=5,𝜆3=5	3.6235	3.8534	5.966159755
𝜆2=5,𝜆3=20	4.0809	4.5069	9.452173334