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以ABAQUS非线性有限元分析软件作为平台,结合动力学、静力学和模态分析相关理论,建立了集残余应力-振动模态分析于一体的圆锯片多点加压适张过程弹塑性仿真模型,获得了圆锯片的适张应力场、振动模态及固有频率。利用X射线应力检测仪对多点加压适张后圆锯片内部的残余应力场进行了实测,通过与仿真计算结果的对比,验证了本文仿真模型的正确性。仿真计算结果表明:多点加压适张后,圆锯片外缘生成了一定数值的切向拉应力,能够抵消切削热应力的影响;圆锯片波节圆数Nc=0、波节直径数Nd≥2的固有频率明显增加,动态稳定特性获得了改善。
ABAQUS nonlinear finite element analysis software is used as a platform. Based on the theories of dynamics, statics and modal analysis, a set of elastic-plastic simulation Model, obtained the circular saw blade suitable stress field, vibration mode and natural frequency. The X-ray stress detector was used to measure the residual stress field inside the multi-point post-tensioned circular saw blade. The simulation results show that the simulation model is correct. The simulation results show that after the multi-point compression is applied, the tangential tensile stress is generated on the outer edge of the circular saw blade, which can counteract the influence of cutting thermal stress. The circular saw blade has Nc = 0 and nodal diameter The natural frequency of Nd≥2 obviously increases, and the dynamic stability characteristics are improved.