火箭增压管路多点随机激励试验技术研究

Multi-exciter random vibration test for rocket pressurized pipeline

文章介绍了一种改进的管路试验方法——多点随机激励试验技术。根据管路自身的特点,该方法可以更加真实地模拟管路的工作环境。通过试验获得了在不同相干和相位条件下管路动态响应的变化规律。结果表明:相位和相干都可以改变管路动态响应,这可为管路多点振动试验条件的设计或选取提供依据。

An improved method for the pipeline environment test, the multi-dimensional vibration technique, is proposed in this paper. With the method, the working environment of the pipeline system can be more precisely simulated. The variation characteristics of the pipeline are obtained with different coherences and phases in the multi-dimensional vibration. The results indicate that both the coherence and the phase play an important role in the pipeline dynamic response. This information may serve as a reference for the simulation and the characterization of the PSD matrix during the pipeline multi-dimensional vibration test.