【摘要】 研究“钻石背”弹翼的颤振特性.采用Newmark算法简化颤振方程,耦合结构模型和非定常Navier-Stokes模型在时域内求解颤振方程.使用FLUENT 6.2软件求解非定常Navier-Stokes方程,得到非定常气动力;使用NASTRAN软件弹翼进行结构分析.用AGARD 445.6翼算例验证了计算方法的可行性,进行了“钻石背”弹翼的颤振特性计算,得到了颤振速度和颤振频率.更多还原

【Abstract】 In order to study the flutter characteristics of diamond back wing,a first order code has been developed to interface a structural model with an unsteady Navier-Stokes fluid model.FLUENT 6.2 was chosen to calculate the unsteady aerodynamics.NASTRAN was chosen to analyse the structures.Initial testing of this code has been completed on AGARD 445.6 wings.Computational results agreed well with the experiments and the computed results of other researchers.The procedure is thus demonstrated to be accurate.The code was used to analyse the flutter characteristics of diamond back wing and obtained the flutter velocity and frequency of diamond back wing.更多还原