This invention provides a
liquid hydrogen pipeline pressure fluctuation suppression energy dissipator and a fluid-structure interaction optimization method, relating to the field of
liquid hydrogen storage and
transportation safety technology. The energy dissipator adopts a modular
integrated design, including a damping vibration reduction module, a gradient throttling module, and a pressure buffer module. The damping vibration reduction module has a corrugated damping inner wall combining spring damping and
bellows; the gradient throttling module consists of multiple throttling plates with gradient-changing orifice parameters; the pressure buffer module is separated by an
inert gas chamber and a liquid chamber containing a stored
liquid layer by a gas-liquid separation membrane. Simultaneously, this invention proposes a corresponding fluid-structure interaction optimization method. By establishing a fluid-structure
interaction model, the physical effects of the energy dissipator are abstracted into flow resistance, flow rate, and flow capacity parameters, solved using the
method of characteristics, and the energy dissipation effect is verified by optimizing structural parameters. This invention achieves multi-structure synergistic energy dissipation, reducing
liquid hydrogen pressure fluctuation amplitude by more than 40%, and is cryogenically resistant and compact, making it suitable for cryogenic liquid
hydrogen transportation systems in the
aerospace and energy fields.