Pyram-shaped deep-sea pressure-resistant shell and design method thereof

A pyram-shaped deep-sea pressure-resistant shell, comprising a conical shell, an annular combined shell, a cylindrical shell, a flange bolt, and a perforated thick plate;

• wherein a bottom end of the conical shell is connected with a top end of the annular combined shell, an interior part of the conical shell is in communication with an interior part of the annular combined shell;
• the perforated thick plate blocks a bottom end of the annular combined shell, the perforated thick plate and the annular combined shell are connected by means of multiple flange bolts;
• the cylindrical shell is disposed inside the annular combined shell, a lower end of the cylindrical shell is inserted in a gap between the annular combined shell and the perforated thick plate, and an upper end of the cylindrical shell and the lower end of the cylindrical shell are respectively connected to an inner peripheral surface of the annular combined shell.