由转速判断涡轮盘行波谐振

为找出液体火箭发动机涡轮盘疲劳裂纹故障产生的原因，对包含燃气在冲击式涡轮腔内形成的旋转激励与盘行波模态耦合谐振在内的盘的各种可能的耦合谐振进行了分析研究。在其它耦合谐振的可能性被排除后，将前者作为研究重点，并给出发生此种行波谐振的危险耦合转速范围计算公式。对某发动机大量热试转速数据作了分析，给出判断此类耦合谐振的判断依据。

Turbine disk traveling-wave resonance identification by using rotation speed

To find out the real reason of the turbine disk fatigue crack damage of the liquid rocket engine, many possible types of the disk coupling resonances are analyzed, including the disk travelling wave coupling resonance. After the possibilities of other coupling resonances of the disk are eliminated, the coupling resonance between the traveling-wave modes and the rotation excitations resulted by the gas pressure oscillation in the impulse turbine cavity is then analyzed in detail , and formula for dangerous coupling rotation speed region calculation is presented. The coupling resonance criteria are obtained after the analysis of large amount of engine hot test rotating speed measurement data.