民机飞行载荷谱编制方法

New approach for generating flight load spectrum of civil aircraft

探索了由同类机型的飞行实测载荷统计数据,推断新设计机型的飞行谱,进而编制其载荷谱的新途径.采用国外同类飞机的飞行实测载荷统计数据,依据类比法,分析和推断出某民机的飞行谱以及各飞行状态连续应力谱;在此基础上,根据民用运输机的TWIST编谱方法,编制了各飞行状态的突风和机动载荷谱,最终,随机生成了其飞行谱对应的5×5地-空-地载荷谱,从而验证了探索途径的可行性与有效性.采用该方法可以加快民机研制周期.

A novel approach was outlined to generate flight load spectrum for a new civil airplane from the statistical data of actural flight load on similar type of ones. The flight spectrum and continuous stress se- quences of new civil airplane were derived from the statistical data of actural flight load of B737-400 plane by means of the analogism and the gust and maneuver spectra were then generated on the basis of the TWIST method. Finally, 5 x5 ground-air-ground spectrum was obtained from the random sequencing. The example shows the practical application of new approach.