The lfutter of a large-aspect-ratio wing with engine is analyzed, in which the large deformation and the thrust effects of the engine under wing are considered. A twin-beam wing and the engine compartment are modeled as beams. The steady aerodynamics of the curved surface is calculated by the modiifed strip theory;the unsteady aerodynamics is calculated by the modiifed Theodorsen method;the thrust of the engine is alone the engine axis. The vibration and the lfutter characteristics of the wing with the steady aerodynamics of different angles of attack and with the different thrusts of the engine are analyzed. The results show that the change of the static deformation and the vibration frequencies affected by the thrust are small, but the change of the lfutter speed can not be neglected which would be an important factor limiting the large transporter design.%分析了带翼吊发动机的大展弦比机翼颤振特性，其中考虑了机翼大变形和发动机推力的作用。采用梁单元对双梁式机翼和发动机吊舱进行了结构建模，采用修正的片条理论计算曲面定常气动力，修正的Theodorsen方法计算曲面非定常气动力，发动机推力始终沿发动机轴线。研究机翼在不同攻角时的定常气动力及发动机推力联合作用下固有振动和颤振特性的变化情况。结果表明，发动机推力对机翼静变形和固有频率改变不大，但对颤振临界速度的变化量不容忽视，有可能成为大型运输机机翼设计的限制因素。
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