氧输送管路动态水试仿真分析

摘要

利用AMESim软件针对某型运载火箭氧输送管水试试验进行仿真分析，建立无蓄压器和带蓄压器试验系统仿真模型，模拟试验过程中的主要压力变化，并利用软件自带的FFT变换（快速傅立叶变换）获取管路在与水介质耦合作用下的一阶频率和二阶频率。通过对比分析发现，仿真结果与试验结果比较吻合，验证了仿真模型的有效性。%The simulating analysis of liquid oxygen pipe dynamic test with water is conducted using AMESim software. The simulation models with and without accumulators are established and main pressure change during the test is simulated. With the assistance of FFT transform, the first and second order frequencies of the pipe under coupling between pipe and water are obtained. The simulation results show a high consistence with the test results and validity of the simulation model is verified.