南京航空航天大学学报2025，Vol.57Issue(2)：259-265,7.DOI:10.16356/j.1005-2615.2025.02.006
基于激振试验的直升机机体当量参数计算分析
Analysis of Equivalent Parameter Calculation of Helicopter Fuselage Based on Excitation Test
吴靖 1刘湘一 1宋山松1
作者信息
- 1. 海军航空大学航空基础学院,烟台 264001
- 折叠
摘要
Abstract
When calculating the equivalent parameter to the hub center of helicopter fuselage based on excitation test data,the calculation result would be different with different point-taking schemes,amplitude errors and phase errors.In terms of this issue,the equivalent parameters of the 1st-order mode of transverse motion of a certain type of helicopter with large mass are calculated with different point-taking schemes.The difference between the calculated equivalent mass and equivalent stiffness is significant,and analysis shows that this result is mainly caused by the phase deviation.The computational formulas of equivalent parameters for amplitude error and phase error are derived.After analyzing the formulas,the suggestions of point selection are given as follows:The two points could be selected based on the amplitude of the excited displacement response,and they should be as close to the resonance point as possible.The frequency response curve is calculated using the obtained equivalent parameters and compared with the test data for verification.To avoid the sensitivity to amplitude and phase errors in the calculation of equivalent parameters,the difference in excitation frequencies between the selected two points should not be too small.关键词
激振试验/直升机机体/当量参数Key words
excitation test/helicopter fuselage/equivalent parameter引用本文复制引用
吴靖,刘湘一,宋山松..基于激振试验的直升机机体当量参数计算分析[J].南京航空航天大学学报,2025,57(2):259-265,7.
