Dynamic response analysis of an aircraft structure under thermal-acoustic loads

13th International Conference on Motion and Vibration Control; 12th International Conference on Recent Advances in Structural Dynamics

Cheng, H.^1 ; Li, H.B.^1 ; Zhang, W.^1 ; Wu, Z.Q.^1 ; Liu, B.R.^1

Science and Technology on Reliability and Environment Engineering Laboratory, Beijing Institute of Structure and Environment Engineering, Beijing

100076, China^1

关键词: Aircraft structure;    Dynamic response analysis;    Monte Carlo theory;    Radiation heating;    Structural finite element methods;    Structural response;    Vibro acoustic response;    Vibro-acoustic analysis;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/744/1/012236/pdf
DOI  :  10.1088/1742-6596/744/1/012236

来源: IOP

【 摘 要 】

Future hypersonic aircraft will be exposed to extreme combined environments includes large magnitude thermal and acoustic loads. It presents a significant challenge for the integrity of these vehicles. Thermal-acoustic test is used to test structures for dynamic response and sonic fatigue due to combined loads. In this research, the numerical simulation process for the thermal acoustic test is presented, and the effects of thermal loads on vibro-acoustic response are investigated. To simulate the radiation heating system, Monte Carlo theory and thermal network theory was used to calculate the temperature distribution. Considering the thermal stress, the high temperature modal parameters are obtained with structural finite element methods. Based on acoustic finite element, modal-based vibro-acoustic analysis is carried out to compute structural responses. These researches are very vital to optimum thermal-acoustic test and structure designs for future hypersonic vehicles structure.