后坐部分 meaning in English

recoil velocity

This paper focuses on launch dynamics of self - propelled gun with nonlinear finite element methods and post - processing technology , based on " the ninth national five years project " of defense keystone research task of dynamic simulation technique study . the main results are concluded as followings : i ) a modeling method of modularization and parameterization is presented . the whole system is composed of six modules , each module is based on parameterization modeling , which makes modification easier and modeling efficient higher
本文研究的自行火炮非线性有限元法的动力学仿真及其后处理技术是国防“九五”重点预研项目“先进加榴炮系统仿真技术研究”的部分内容，其研究成果主要有以下几个方面： 1 、提出了自行火炮系统模块化、参数化的仿真建模方法，自行火炮分为后坐部分等六个组成模块，每个模块采用参数化建模，便于修改局部设计参数，提高了建模效率。