子程序段 meaning in English

subprogram segment
subroutine segment

Based on the basic theory of soil - structure interaction , a finite element model for the analysis of soil - buried structure dynamic interaction is built with ansys program in this paper , some subroutines are programmed in apdl for the time - history seismic analysis
本文根据土-结构动力相互作用的基本理论，在ansys上建立了土-地下结构相互作用的有限元模型，利用ansys的二次开发语言apdl编制了时程分析的子程序段。