基于ADAMS的轴对称矢量喷管喷口精度分析

Analysis of Axial - Symmetric Vectoring Exhaust Nozzle’s Nozzle AccuracyBased on ADAMS

为研究误差对喷口精度的影响,以轴对称矢量喷管为研究对象,利用ADAMS软件的参数化点的功能建立模型并仿真,验证模型有效性;建立衡量喷口精度的指标:偏转角、方位角、喷口面积的测量函数;基于设计研究功能,得出了单一设计变量误差对喷口精度影响的灵敏度;通过ADAMS/Insight模块、蒙特卡洛方法以较快的速度、较少的工作量完成零部件随机设计变量误差的分析。研究结果表明:在随机误差-0.1 mm<μ<0.1 mm的情况下,偏转角仿真值与平均值相对误差为0.675%,方位角为0.847%,喷口面积为0.048%,喷口精度变化较小,可以保证发动机工作范围。

In order to study the influence of error on nozzle accuracy,the axial-symmetric vectoring exhaust nozzle was taken as the research object,and the parametric point function of ADAMS software was used to build the model and simulate to verify the validity of the model.The indexes of the measurement functions of deflection angle,azimuth angle and nozzle area were established to measure the accuracy of the nozzle.Based on the design research function,the sensitivity of single design variable error on nozzle accuracy was obtained.ADAMS/Insight module and Monte Carlo method were used to complete the analysis of random design variable error of parts with a faster speed and less workload.The results show that the deflection angle relative error of the simulation value and the mean is 0.675%,azimuth angle is 0.847%,and nozzle area is 0.048%,the variation of nozzle accuracy is small,and the working range of the engine can be guaranteed when the random error is-0.1 mm<μ<0.1 mm.