沈阳航空航天大学学报2025，Vol.42Issue(5)：37-45,9.DOI:10.3969/j.issn.2095-1248.2025.05.005
电动直升机设备平台振动响应的仿真与试验
Simulation and test of vibration response on electric helicopter equipment platforms
摘要
Abstract
To ensure the dynamic performance of the electric helicopter equipment platform under complex vibration and shock environments,a combined test and simulation approach was adopted to conduct an in-depth investigation of a specific electric helicopter equipment platform.The simulation part utilized HYPERMESH and ANSYS software to perform modal analysis,frequency sweep analysis,random vibration analysis,and transient response analysis,obtaining the platform's dynamic characteristics and key data.The test part included random vibration and shock tests.The random vibration testing employed an acceleration power spectral density(PSD)scaled to 1g RMS as the excitation condition,and the shock testing was conducted with a peak acceleration of 4 g and a half-sine wave excitation lasting 6 ms.The results show that the first two modal frequencies of the platform are 33.735 Hz and 39.751 Hz,and the low-frequency modes may couple with low-frequency excitations during operating condition.Random vibration analysis shows that the primary response is concentrated within the 70～300 Hz range.The maximum deformation of the platform under random vibration conditions is 1.572 9 mm,and the stress distribution is uniform,meeting the material yield strength requirements.Transient shock analysis indicates that the platform's maximum stress under a 4 g shock is 11.464 MPa,which is significantly lower than the material yield strength.The correlation between test and simulation results verifies the reliability of the platform design.This study provides a theoretical basis and reference for the optimized design of electric helicopter equipment platforms.关键词
电动直升机/随机振动分析/瞬态响应分析/设备平台/有限元Key words
electric helicopter/random vibration analysis/transient response analysis/equipment platforms/finite element分类
航空航天引用本文复制引用
王锋,吴诗宇,查政明,周国庆,杨康..电动直升机设备平台振动响应的仿真与试验[J].沈阳航空航天大学学报,2025,42(5):37-45,9.基金项目
辽宁省工信厅专项研究项目(项目编号:LNGXTJB20250165). （项目编号:LNGXTJB20250165）
