Figure 4. Standing waves on the T-tube. a) time-dependent chart of acceleration, b) frequency dependence of acceleration

From

Quantification of Force Effects in Dynamically Loaded Pipe Systems

František Trebuňa, František Šimčák, Jozef Bocko, Peter Sivák

American Journal of Mechanical Engineering. 2013, 1(7), 398-402 doi:10.12691/ajme-1-7-49