Test and Numerical Analysis of Natural Frequency for Tube

In order to confirm the validity of calculating natural frequencies for filling liquid tube by the FEA. The simulation calculation could be achieved for tube vibration analysis of digital design. Natural frequencies are measured and calculated for tubes with liquid by the FEA and test. Using the hammering method vibration feature is tested for freedom tube of empty, filling oil and filling fuel. And natural frequencies are calculated by the FEA on ANSYS software. Effect factors are analyzed on natural frequencies for tube diameter, liquid type etc. Especially the numerical value of frequency decrease is found with filling liquid tube. The calculation model of natural frequencies is build on including several factors such as filling liquid. The technology foundation is established for analyzing tube vibration features. The simplification calculation could be provided for simulating vibration analysis of digital design tubes.