Research Article

Numerical Simulation of Flow-Induced Vibration of Three-Dimensional Elastic Heat Exchanger Tube Bundle Based on Fluid-Structure Coupling

Table 3

Theoretical value and numerical calculation value for natural frequency of four-span tube.

OrderTheoretical value (hz)Numerical calculation value (hz)Error (%)

First-order frequency400.4412.903.12
Second-order frequency536.2550.782.72
Third-order frequency692.8708.202.22
Fourth-order frequency778.1792.771.89
Fifth-order frequency1489.91504.40.97