基于自适应耦合算法的石材锯切过程仿真研究  

Simulation of Stone Cutting Process Based on Adaptive Coupling Method

作　　者：田永军[1,2] 段国林 康军广[1] 刚建华[1] 

机构地区：[1]河北工业大学机械工程学院,天津300130 [2]天津职业技术师范大学工程实训中心,天津300222

出　　处：《系统仿真学报》2018年第2期497-504,512,共9页Journal of System Simulation

基　　金：天津市自然科学基金(11JCZDJC23100);河北省自然科学基金(F2014202241)

摘　　要：针对石材锯切过程中复杂的动态力学行为及有限元法在处理大变形时数值不稳定等问题,依据连续损伤力学理论,采用混合单元自适应耦合算法建立了锯片-石材切割系统的加工模型,模拟了石材锯切过程。分析发现:石材去除过程是一个间断循环的过程;锯切过程中,切割力从零开始,接触石材后迅速增大,随后又减小,最后在一定范围内平稳波动;根据锯片表面和石材内部等效应力分布情况,确定了模型最易破坏的区域;并通过与实验对比,锯片横向振动速度数据吻合度较高。Aiming at complex nonlinear dynamic behaviors of stone-cutting process with circular saw and handling large mesh deformation instability in FEM, according to brittle material fracture mechanism, an adaptive coupling algorithm was established for calculating the cutting process of circular saw-stone materials system. The results show that the material removal process is a process of intermittent cycle; the cutting force is zero at the beginning of the process, and the force increases rapidly when the blade contacts with the stone, then decreases, eventually varies in a stable fluctuation. According to von-Mises stress distributions of saw blade and stone, the easily damaged region is determined. Through comparison, it is found that the blades＇ transverse vibration velocity simulation data are consistent with the experimental results.

关 键 词：混合单元自适应耦合 石材切割 圆锯片 脆性材料 

分 类 号：TP29[自动化与计算机技术—检测技术与自动化装置] TH122[自动化与计算机技术—控制科学与工程]