CAJ | 학술논문

基于 ANSYS/LS-DYNA 建立圆锯片–花岗石切割系统的仿真模型，动态模拟锯切过程，并通过LS-PREPOST 后处理获得锯切力、应力、位移等数据，将时域 Z-加速度曲线经过 FFT 变换进行频谱分析。研究表明：锯切过程中，锯齿冲击力主要集中在 X 和 Y 方向，且锯切分力中，径向力贡献最大，轴向力贡献最小，越接近激励点应力水平越高，但远离激励点的应力交替变化更频繁，更易产生疲劳裂纹；其中，锯片轴向位移按正弦规律变化，且振动能量主要集中在齿通频率 f z与高次谐波频率 N ×f z处。
기우 ANSYS/LS-DYNA 건립원거편–화강석절할계통적방진모형，동태모의거절과정，병통과LS-PREPOST 후처리획득거절력、응력、위이등수거，장시역 Z-가속도곡선경과 FFT 변환진행빈보분석。연구표명：거절과정중，거치충격력주요집중재 X 화 Y 방향，차거절분력중，경향력공헌최대，축향력공헌최소，월접근격려점응력수평월고，단원리격려점적응력교체변화경빈번，경역산생피로렬문；기중，거편축향위이안정현규률변화，차진동능량주요집중재치통빈솔 f z여고차해파빈솔 N ×f z처。
A model of saw blade and cutting granite system was established to simulate the dynamic sawing process based on ANSYS∕ LS-DYNA software? The data of cutting force, stress and displacement was collected using LS-PREPOST?In addition,the spectrum analysis was carried out on the Z-acceleration curve after FFT transferred?Research showed that in the process of sawing,the shock force of the sawtooth was mainly concentrated at X and Y direction,and that the radial force was the largest and the axial force was the smallest?As it came closer to the excitation point,the stress increased?But when far away from the excitation point,the alternation change of the stress was more frequent,which would cause the fatigue crack?The axial displacement of the blade changed as sine wave and the vibration energy was concentrated at the tooth passing frequency f z and higher harmonic frequencies N ×f z.