民用飞机设计重心包线计算

Calculation of design center of gravity envelope of civil aircraft

基于JSBSim建立了飞机的气动模型、起落架模型及全机飞行力学模型,对不同重心位置、不同重量模型进行配平分析,给出了民用飞机设计重心包线的计算方法。以B737飞机为例对不同飞行状态进行了配平计算,证明了该方法的合理性。最后,以该机为算例进行了设计重心包线的计算。结果表明,所计算的重心包线与实际情况较吻合。

Based on JSBSim,the aerodynamic model,landing gear model and flight dynamics model of the aircraft were established.The aircraft was trimmed in the case of different center of gravity positions and weights,and the calculation method of the center of gravity envelope of civil aircraft was proposed.Taking B737 as an example,the trimming calculations under different flight states were carried out,which proves the rationality of the method.Finally,the calculation of the center of gravity envelope was carried out taking B737 as an example,which shows good fitness with the actual results.