固体发动机及火箭固有振动特性预估

PREDICTION FOR NATURAL VIBRATION CHARACTERISTICS OF SOLID ROCKET MOTOR (SRM) AND SOLID ROCKET

关键词:  固体推进剂火箭发动机  固体推进剂火箭  振动  预测

Key words:  Solid propellant rocket engine  Solid propellant rocket  Vibration  Prediction

摘要:

用有限元方法计算了选用的固体火箭各级发动机壳体、药柱及整机固有频率和振型,并计算了火箭固有振动特性,为发动机冲击试验、今后的模态和振动试验提供了参考数据。这些数据是选择测试设备及量程、激励方式及位置、测点布置及试验夹具设计等测试技术所必需的。

Abstract:

Finite element method is used to calculate the natural frequency and vibration pattern of motor cases,grains and integral motors of a sample solid rocket. The natural vibration characteristics of the solid rocket is also analyzed. These data are useful in the design of SRM impact test and modal test. For examples, they are necessary in the selection of test e-quipment and measurement range, exciting mode and location, measurement point arrangement and holding device design , etc.