拉杆结构中弹簧刚度和有限元模型刚度融合修正方法研究

张子阳;谢寿生;钱征文;龙 门;彭靖波

振动与冲击 ›› 2011, Vol. 30 ›› Issue (11) : 53-56.

PDF(1442 KB)
PDF(1442 KB)
振动与冲击 ›› 2011, Vol. 30 ›› Issue (11) : 53-56.
论文

拉杆结构中弹簧刚度和有限元模型刚度融合修正方法研究

  • 张子阳1; 谢寿生1; 钱征文1; 龙 门2; 彭靖波1
作者信息 +

Fusion stiffness modification of spring and fe modal in rod fasten rotor

  • Zhang Zi-yang1; Xie Shou-sheng1; Qian Zheng-wen1; Long Men2;Peng Jing-bo1
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摘要

为建立更加准确的航空发动机高压转子的有限元模型,对表征高压转子拉杆结构的盘与盘、拉杆与盘之间接触的力学模型进行研究,重构了接触部位的有限元模型。提出弹簧刚度矩阵和有限元模型刚度矩阵的融合修正方法,建立了包含接触的有限元刚度整体优化模型。运用拉直算子将优化模型中需要修正的参数分离出来,结合实验模态分析得到的模态参数对有限元刚度矩阵进行了修正。实例证明修正后的有限元模型真实反映了拉杆联接的航空发动机高压转子的接触状态。

Abstract

This paper presents a method to update the FE(finite element) modal of high pressure spool in aero engine. Having analyzed the mechanical modals which described the contacting surfaces between the wheel disks in rod fasten rotor, it remodeled the contacting surface of FE modal of high pressure spool. By using a fusion method which combines the modification of stiffness of the spring and FE modal together, it develops a total optimization modal for FE modal stiffness updating which concerns contacting surface. Furthermore, it employs the straighten algorithm to extract the parameters which need to be calibrated in the calculation of the optimization modal, and modifies them with modal parameters got by experimental modal analysis. Results of an experimental application of this fusion modification are given to illustrate that the modified FE modal truly represents the contacting state of high pressure spool.

关键词

修正有限元模型 / 接触模型 / 目标融合 / 拉直算子 / 实验模态分析 / 拉杆结构

Key words

finite element modal updating / contacting modal / target fusion / straighten algorithm / experimental modal analysis / rod fasten rotor

引用本文

导出引用
张子阳;谢寿生;钱征文;龙 门;彭靖波. 拉杆结构中弹簧刚度和有限元模型刚度融合修正方法研究[J]. 振动与冲击, 2011, 30(11): 53-56
Zhang Zi-yang;Xie Shou-sheng;Qian Zheng-wen;Long Men;Peng Jing-bo. Fusion stiffness modification of spring and fe modal in rod fasten rotor[J]. Journal of Vibration and Shock, 2011, 30(11): 53-56

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