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针对某型号大容积贮箱,其晃动特性直接影响到整个系统的动力学特性及轨道控制系统。为了获得该贮箱不同工况下的一阶自由晃动频率,首次提出利用气垫悬浮技术进行贮箱晃动试验的新方法,利用该方法设计出一整套试验系统,该系统包含试验件、激励系统、气浮控制系统、数据采集系统及加注排放系统等。使用试验系统开展不同工况条件下的液体晃动试验,并用CFD软件对该贮箱进行时域分析,结合傅立叶变换最终获得仿真结果。分析比较晃动试验结果、理论计算结果及CFD仿真计算结果,结果显示3种结果一致吻合,测试系统的可靠性和理论CFD仿真结果的正确性均得到验证。
For a large-capacity tank model, the rocking characteristics directly affect the dynamics of the entire system and track control system. In order to obtain the first-order free-run frequency of the tank under different operating conditions, a new method of tank shaking test using air-cushion suspension technology is proposed for the first time. A set of test system is designed by using this method. The system includes test parts, Flotation control system, data acquisition system and filling emission system. The test system was used to test the liquid sloshing under different working conditions. The CFD software was used to analyze the tank in time domain and the Fourier transform was used to obtain the simulation results. The results of rocking test, theoretical calculation and CFD simulation are analyzed and compared. The results show that the three kinds of results agree well with each other, and the reliability of the test system and the correctness of the theoretical CFD simulation results are verified.