弹支航空液压管路的加速度载荷响应分析  

Acceleration load response analysis for elastically supported aviation hydraulic pipe-lines

作　　者：权凌霄[1] 李东[1,2] 王鸿鑫[3] 曹源[1] 

机构地区：[1]燕山大学河北省重型机械流体动力传输与控制实验室,河北秦皇岛066004 [2]中航工业金城南京机电液压工程研究中心,南京210000 [3]上海飞机设计研究院,上海200232

出　　处：《振动与冲击》2016年第21期209-213,共5页Journal of Vibration and Shock

基　　金：国家重点基础研究发展计划(973计划(2014CB046405);国家自然科学基金(51375423);流体动力与机电系统国家重点实验室开放基金(GZKF-201309)

摘　　要：承受加速度载荷激励的管路应力分析是飞机液压管路设计重点考虑的问题之一。基于响应谱分析方法,研究航空液压管路在加速度载荷作用下的应力响应规律。采用"梁"模型建立两端固支液压管路的动力学数学模型,求解其固有频率;建立其有限元模型进行模态分析,得到管路固有频率。通过锤击实验验证了动力学模型和有限元模型的准确性。以加速度为载荷,对弹支管路进行响应谱分析,发现最大应力出现在管路支承位置,在此基础上,改变管路承受的加速度载荷和支撑刚度,仿真结果表明最大应力值与加速度大小成线性关系,与支撑刚度成非线性关系。Stress analysis under acceleration load excitation is one of the key problems in the design of aviation hydraulic pipelines.Based on the response spectral analysis method,the stress response law of aviation hydraulic pipelines under the action of acceleration load was studied.The dynamic model of a two-end-fixed hydraulic pipeline was established by using a “beam”model,and its natural frequencies were solved.Then its finite element model was established to do the modal analysis and obtain its natural frequencies.The correctness of the dynamic model and the finite element model was verified with hammer tests.The response spectral analysis of the corresponding elastically supported pipeline was performed under the acceleration load.The results showed that the maximum stress appeares at the support position of the pipeline.Moreover,the acceleration load and support stiffness were changed,the simulation results showed that the relationship between the maximum stress and the acceleration load is linear,and the relationship between the maximum stress and support stiffness is nonlinear.

关 键 词：弹支 管路 加速度激励 响应谱 应力 

分 类 号：TH137[机械工程—机械制造及自动化] V228[航空宇航科学与技术—飞行器设计]