This paper develops a multi-time scale kinetics solution strategy for the flight dynamic simulation of elastomeric aircraft. The combination of computational fluid dynamics (CFD) solver and reduced-order model is utilized to calculate the aerodynamics of elastic aircraft. CFD is applied to the aerodynamic solution of rigid motion, and reduced-order model is to the elastic deformation. The governing equations of rigid-body dynamics and structure dynamics are decoupled in time-scale, and their time step sizes can be set differently. This method overcomes the problem of large difference in characteristic times between rigid-body dynamics and structure dynamics, and improves the calculation efficiency of CFD based multi-disciplinary coupling solution. For current work, the multi-time scale kinetics solution method is applied to the simulation of store separation problem considering elastic deformation of carrier aircraft. The autoregressive with exogenous input model is employed to establish the generalized aerodynamic model of carrier. By comparison, the time responses of store obtained by the multi-time scale kinetics solution method are in good agreement with those by traditional CFD based multi-disciplinary coupling simulation, which validates high precision of the new method. Furthermore, the calculation amount of the new coupled calculation method is reduced by about an order of magnitude compared with that of the traditional method. The multi-time scale kinetics solution method can provide an effective solution strategy for similar engineering problems.

本文为弹性飞机的飞行动力学仿真开发了一种多尺度比例动力学解决方案。计算流体动力学（CFD）求解器和降阶模型的组合用于计算弹性飞机的空气动力学。CFD适用于刚体的气动解决方案，而降阶模型适用于弹性变形。刚体动力学和结构动力学的控制方程在时间尺度上解耦，并且它们的时间步长可以不同地设置。该方法克服了刚体动力学与结构动力学的特征时间差异较大的问题，提高了基于CFD的多学科耦合解的计算效率。对于当前的工作，将多尺度尺度动力学求解方法应用于考虑舰载机弹性变形的仓库分离问题的仿真。采用外源输入的自回归模型，建立了载体的广义气动模型。相比之下，多时间尺度动力学求解方法获得的存储时间响应与传统的基于CFD的多学科耦合模拟得到的时间响应吻合良好，验证了该方法的高精度。此外，与传统方法相比，新的耦合计算方法的计算量减少了大约一个数量级。多时间尺度动力学求解方法可以为类似的工程问题提供有效的求解策略。