CAJ | 학술논문

为计算某型号电机底座的固有频率，研究其振动特性，利用 Lanczos法对其进行模态分析，得到了前6阶固有频率及振型。在此基础上，运用 Hyperworks软件的Optistruct模块，以优化后的体积不超过底座结构总体积30％作为约束，以1阶固有频率最大化为目标，进行了基于变密度法的底座结构拓扑优化分析，给出了底座结构材料最优分布云图和频率迭代变化曲线。优化结果表明，此方法能有效提高底座结构的1阶固有频率，从而可能避开谐振区，抑制电机与底座之间发生共振。
위계산모형호전궤저좌적고유빈솔，연구기진동특성，이용 Lanczos법대기진행모태분석，득도료전6계고유빈솔급진형。재차기출상，운용 Hyperworks연건적Optistruct모괴，이우화후적체적불초과저좌결구총체적30％작위약속，이1계고유빈솔최대화위목표，진행료기우변밀도법적저좌결구탁복우화분석，급출료저좌결구재료최우분포운도화빈솔질대변화곡선。우화결과표명，차방법능유효제고저좌결구적1계고유빈솔，종이가능피개해진구，억제전궤여저좌지간발생공진。
To calculate the natural frequency of a particular motor base and study its vibration characteristics ,the Lanczos method is used for its modal analysis to obtain the first six natural frequencies and modes .On this basis ,using the Optistruct module of the Hyperworks software to carry out structure topology optimization analysis based on the variable density method ,which is taking volume fraction of 30% for the constraint and maximizing the first order natural frequency as objective .The optimal material layout and frequency iterative curve are given at last .The optimization results show that this method can effectively improve the first natural frequency of the motor base ,so as to avoid the resonance between the motor and the base .