摘要
针对复合材料长变距杆力学性能进行研究,重点关注了复合材料长变距杆的等效刚度和临界载荷。首先,通过试验和数值模拟方法分别计算等效刚度,两种方法等效刚度结果误差为1.41%。其次,基于理论分析、数值模拟和试验三种方法,确定复合材料长变距杆存在初始挠度下的临界载荷。结果表明:数值模拟结果相对试验结果误差为7.9%,理论计算结果相对试验结果误差为14.6%。在此基础上,利用数值模拟方法分析了不同初始挠度对临界载荷的显著影响,当初始挠度为8.00 mm时,复合材料长变距杆在10.73 kN载荷下即发生屈曲,不满足使用要求。最后,提出了适用于复合材料长变距杆临界载荷与初始挠度的方程,为生产制造和使用维护提供设计依据。
The mechanical properties of composite long pitch rods are investigated,with special attention to the equivalent stiffness and critical load.Firstly,the equivalent stiffness is calculated by experimental and numerical simulation methods respectively,and the equivalent stiffness results of the two methods have an error of 1.41%.Secondly,based on the three methods of theoretical analysis,numerical simulation and test,the critical load under the existence of initial deflection of the composite long pitch rod is determined.The results show that the error of numerical simulation results relative to the test results is 7.9%,and the error of theoretical calculation results relative to the test results is 14.6%.On this basis,the significant effect of different initial deflections on the critical load is analyzed by numerical simulation,and when the initial deflection is 8.00 mm,the composite long pitch rod buckles at 10.73 kN,which does not meet the use requirements.Finally,the equations for the critical load and initial deflection of the composite long pitch rod are proposed to provide a design basis for manufacturing and maintenance.
作者
孙佳濛
张飞
董锦山
陆裕辉
SUN Jiameng;ZHANG Fei;DONG Jinshan;LU Yuhui(China Helicopter Research and Development Institute,Jingdezhen 333000,China)
出处
《复合材料科学与工程》
北大核心
2025年第5期125-131,共7页
Composites Science and Engineering
关键词
复合材料变距杆
等效刚度
压杆稳定
初始挠度
composite pitch rod
equivalent stiffness
stability of compression bar
initial deflection
作者简介
第一作者:孙佳濛(1996-),男,研究生,助理工程师,主要从事直升机桨毂/自倾结构设计、复合材料铺层及有限元分析方面的研究,15737180918@163.com。
