气流激励下柔性支承转子的瞬态响应

Transient Response of Flexible Supported Rotor under Airflow Excitation

气流激励对于柔性支承转子的瞬态响应有重要影响。本文通过分析气流扰动转子的物理过程,引入Muszynska流体激励力模型,建立了柔性支承转子的运动微分方程,并通过数值计算得到了进气时间和进气压强对转子瞬态响应的影响规律。结果表明:在同一进气压强下,进气时间越长,气流激励力对转子瞬态响应产生的影响越大,并计算得到了临界进气时间和临界进气压强。设计并实施了转子受气流激励影响试验,试验中进气时间对转子动力学响应的影响规律和转子涡动现象与理论分析结果基本一致,验证了理论模型的适用性和理论分析的正确性。

Airflow excitation has a major impact on the transient response of the flexible supported rotor. The physical process of the airflow disturbing rotor was analyzed, the Muszynska fluid excitation model was introduced, and then the differential equation of motion for the flexible supported rotor was established. The influence law of intake time and inlet pressure on the rotor transient response was obtained by numerical calculation. The results show that the longer intake time, the stronger influence of the airflow excitation force on the rotor transient response under the same inlet pressure. The critical intake time and critical inlet pressure were calculated. The applicability and correctness of theoretical models were verified by experiments.