基于结合面的大型螺纹磨床整机静动态特性优化

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振动与冲击 ›› 2012, Vol. 31 ›› Issue (20) : 147-152.

论文

基于结合面的大型螺纹磨床整机静动态特性优化

王禹林吴晓枫冯虎田

作者信息 +

Static and Dynamic Characteristics Optimization of the Whole Large-sized Thread Grinder Based on the Joint Surface

WANG Yu-lin, WU Xiao-feng, FENG Hu-tian

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文章历史 +

摘要

为了准确预测和分析大型螺纹磨床整机的静动态特性，建立的机床整机有限元模型应考虑结合面特性参数。采用弹簧阻尼单元模拟结合面的接触特性，应用吉村允孝法确定各主要结合面的刚度阻尼值，使用ANSYS建立基于结合面特性的大型螺纹磨床整机有限元模型，进而进行静动态特性分析找出其薄弱环节，并研究各结合面刚度对整机动态特性的影响，针对影响较大的结合面刚度进行优化，改善了整机的静动态特性。结合面参数优化后，整机x，y，z方向的静刚度分别提高15%，19%和7%，且整机的各阶模态固有频率均有不同程度提高，其中一阶固频提高达10%，整机的共振振幅降低了约1/2，原机床的振动得到了很好的抑制。

Abstract

To accurately predict the static and dynamic characteristics of the whole large-sized thread grinder, parameters of the joint surface should be considered in the FEA model. The joint surface was handled with the spring-damping element, and the stiffness and damping of the joint surface was calculated by Yoshimura-Method. The FEA model of the whole grinder based on the joint surface was established by ANSYS, to find its weak points and study the influence of joint surface through the static and dynamic analysis. Then the stiffness of joint surface which had more important influence was optimized to improve the dynamic characteristics. The results show that the static stiffness in x, y and z directions is increased by 15%, 19% and 7%; Each order of natural frequency is all increased, and the first natural frequency is increased by 10%; The resonant amplitude is reduced about 1/2, and the vibration has got suppression.

导出引用

王禹林吴晓枫冯虎田 . 基于结合面的大型螺纹磨床整机静动态特性优化[J]. 振动与冲击, 2012, 31(20): 147-152

WANG Yu-lin;WU Xiao-feng;FENG Hu-tian. Static and Dynamic Characteristics Optimization of the Whole Large-sized Thread Grinder Based on the Joint Surface[J]. Journal of Vibration and Shock, 2012, 31(20): 147-152