摘要
在对直齿圆柱齿轮结构动力学特性进行准确可靠的分析时,有限元模态模型的准确性至关重要。将初始有限元模型计算的固有频率和试验模态测量的固有频率进行对比,以ANSYS优化设计模块为基础,将有限元模态模型修正问题转化为求解直齿轮固有频率计算值与试验值的相对误差绝对值和的最小值问题。计算结果表明,有限元模态模型修正后前6阶固有频率最大相对误差由2.99%降为1.24%,显著提高了直齿轮有限元模态模型的精度且为有限元模态模型提供了相应的阻尼特性,保证了进一步的动力学特性预测分析的准确性。
The finite element modal-parameter model was critical to the reliable and accurate analysis of the structural dynamics performance of spur gear. Comparing with the natural frequency of the initial finite element model to the experimental modal, the modification of finite element modal-parameter model was converted into the issue of solving the minimum relative errors of the natural frequency between the calculated and experimental results of spur gear based on the ANSYS optimization module. The results showed that the maximum relative error of the first six natural frequency was reduced from 2.99% to 1.24% after modifying the finite element modal-parameter model and the accuracy of the finite element modal-parameter model of spur gear was significantly improved with the corre- sponding damping characteristic supplied to the finite element modal-parameter model, ensuring the precise of the furthermore dynamics performance prediction analysis.
出处
《机械科学与技术》
CSCD
北大核心
2013年第12期1738-1742,共5页
Mechanical Science and Technology for Aerospace Engineering
基金
国家自然科学基金项目(51275538)资助
关键词
有限元
模态分析
模型修正
固有频率
优化设计
damping
design
errors
experiments
finite element method
modal analysis
natural frequencies
optimization
spur gears
finite element
model modification
optimization design
