Micro-perforated sandwich sound-absorbing and load-bearing structure filled with polyurethane and preparation method thereof

Abstract

A micro-perforated sandwich sound-absorbing and load-bearing structure filled with polyurethane and a preparation method thereof are particularly provided. The micro-perforated sandwich sound-absorbing and load-bearing structure filled with polyurethane includes a sandwich layer, a solid panel, a micro-perforated panel and a polyurethane filling layer. The sandwich layer, the solid panel and the micro-perforated panel are all made of titanium alloy. The sandwich layer is of a triply periodic minimal surface porous structure. An upper surface of the solid panel is integrally connected with a lower surface of the sandwich layer. Multiple micro-pores are formed in a surface of the micro-perforated panel in a running-through manner, and a lower surface of the micro-perforated panel is integrally connected with an upper surface of the sandwich layer. The polyurethane filling layer uniformly fills in the sandwich layer.

Dependencies are inferred from the claim text.