CAJ | 학술논문

为确定制动盘固有频率的容差范围，首先对其进行了试验模态分析和有限元模态分析，二者固有频率的误差小于2%，各对应阶次模态振型一致。在此基础上，利用有限元概率设计方法对影响制动盘固有频率的各结构设计变量进行了灵敏度分析，计算了制动盘固有频率的变化范围。结果表明，制动盘盘体直径、散热辐条宽度与高度、盘体内圈厚度、盘体外圈长度与厚度和沟槽深度等尺寸对低阶固有频率具有显著影响。表明有限元概率设计技术为在线检测系统各阶固有频率容差的设定提供了有效手段。
위학정제동반고유빈솔적용차범위，수선대기진행료시험모태분석화유한원모태분석，이자고유빈솔적오차소우2%，각대응계차모태진형일치。재차기출상，이용유한원개솔설계방법대영향제동반고유빈솔적각결구설계변량진행료령민도분석，계산료제동반고유빈솔적변화범위。결과표명，제동반반체직경、산열복조관도여고도、반체내권후도、반체외권장도여후도화구조심도등척촌대저계고유빈솔구유현저영향。표명유한원개솔설계기술위재선검측계통각계고유빈솔용차적설정제공료유효수단。
For determining the tolerance ranges of the natural frequencies of brake disc, firstly both experi-mental modal analysis and finite element modal analysis are conducted with relative errors of natural frequency re-sults less than 2% and the mode shapes of each corresponding order well coincide. On this basis, the sensitivities of natural frequency to the structural design variables of brake disc are analyzed by using finite element probability de-sign method with the natural frequency ranges of brake disc calculated. The results show that the disc diameter, the width and height of ventilated blades, the thickness of inner disc, the length and thickness of outer disc, and the groove depth have significant effects on lower-order natural frequencies. The finite element probability design tech-nique provides an effective means for the setting of tolerances of natural frequencies in online inspection system.