9results about "Hull shells" patented technology

[Problem] To provide an index-based hull structure manufacturing method, design method and design program with which it is possible to prevent a breach of a cargo oil tank and oil outflow, or to reduce the amount of outflow, in the event of running aground. [Solution] The present invention includes: a step for selecting a steel plate to be applied to a hull structure 10 of a ship; a step for quantifying a stress-strain relationship of the steel plate; a step for using the stress-strain relationship to execute a grounding analysis of the hull structure 10 to which the steel plate is applied, to obtain a calculated value of a critical grounding speed; a step for determining a required value of the critical grounding speed; and a step for evaluating a grounding resistance of the hull structure 10 on the basis of the calculated and required values of the critical grounding speed. The hull structure 10 for which it has been determined, from the evaluation result of the grounding resistance, that the required value is satisfied, is manufactured.

This application discloses a double-hull support assembly for a ship, comprising: ribs, a plurality of outer shell longitudinal ribs, a plurality of inner shell longitudinal ribs, and reinforcing ribs; the ribs are connected between the outer shell plates and the inner shell plates; through holes are formed in the ribs; the plurality of outer shell longitudinal ribs are arranged on the outer shell plates along the ship's height direction, and each of the outer shell longitudinal ribs extends along the ship's length direction; the spacing between adjacent outer shell longitudinal ribs is equal; each of the outer shell longitudinal ribs passes through the through holes and is connected to the ribs; the plurality of inner shell longitudinal ribs are arranged on the inner shell plates along the ship's height direction, and each of the inner shell longitudinal ribs extends along the ship's length direction; the spacing between adjacent inner shell longitudinal ribs is equal; the inner shell longitudinal ribs are opposite to and staggered with the outer shell longitudinal ribs; each of the inner shell longitudinal ribs passes through the through holes and is connected to the ribs; the reinforcing ribs are arranged perpendicular to the ribs, the outer shell plates, and the inner shell plates, and are connected to the ribs.

A submersible vehicle having an elongate shape comprises, arranged along a length of the submersible vehicle, an external surface comprising: a front portion, a middle portion, and a rear portion, a first transitional portion between the front portion and the middle portion, and a second transitional portion between the middle portion and the rear portion; wherein, in a cross-sectional plane perpendicular to the length of the submersible vehicle: the front portion comprises a substantially circular cross-section, the middle portion comprises a substantially triangular cross-section formed of a base surface and, angled relative to the base surface, a first upper surface and a second upper surface, the surfaces joined by radiused vertices, and the rear portion comprises a substantially circular cross-section; the first transitional portion configured such that the substantially circular cross-section of the front portion gradually transitions, along the length of the submersible vehicle, to the substantially triangular cross section of the middle portion, and the second transitional portion configured such that the substantially triangular cross section of the middle portion gradually transitions, along the length of the submersible vehicle, to the substantially circular cross-section of the rear portion. A corresponding hull for a submersible vehicle, a fairing for a submersible vehicle, a kit of parts and a seismic survey system are also provided.

This application relates to the field of metal material processing technology, and discloses a titanium-steel composite plate, its preparation method, and a ship. The titanium-steel composite plate includes a steel substrate layer, a pure titanium cladding layer, and an alloy layer, wherein the alloy layer is disposed between the steel substrate layer and the pure titanium cladding layer; wherein the alloy layer includes a Fe-intermediate element-Ti ternary alloy layer, and the Fe-intermediate element-Ti ternary alloy layer satisfies the following conditions along the direction from the steel substrate layer to the pure titanium cladding layer: the Fe content gradually decreases, the Ti content gradually increases, and the content of the intermediate element first gradually increases and then gradually decreases; the intermediate element is a transition element in the Fe-Ti system. This composite plate exhibits excellent interface quality, as well as excellent structural stability and corrosion resistance.

This invention discloses a method for arranging a staggered tandem cavity group with superior hydrodynamic characteristics, relating to the field of underwater vehicle structure design technology. The key technical points are: it includes multiple cavities arranged in at least two columns, with the at least two columns of cavities staggered along the direction of travel of the underwater vehicle, forming a staggered tandem layout. Furthermore, the ratio of the distance I between two adjacent cavities in the same column to the cavity length L is I / L ≥ 2. This invention, through the staggered tandem cavity layout, reduces the total drag of the cavity group by 70.6%, effectively suppressing the downstream cavity drag multiplication and flow interference. Simultaneously, this cavity layout balances the flow field structure, significantly reduces the Reynolds stress peak, fundamentally improves acoustic stealth performance, avoids noise frequency down-frequencyization and energy amplification, and while maintaining the total number and function of cavities, it still meets the requirements of high performance and high concealment.

The invention belongs to the technical field of air cushion suspension transportation equipment, and relates to an air cushion suspension ship with a lift low-wind-resistance bow body, the air cushion suspension ship comprises a ship body main frame, an arc streamline bow body and a stern body, the arc streamline bow body and the stern body are symmetrically arranged at the two ends of the ship body main frame, the sweepback angle of the front edge of the bow is 17-18.3 degrees, and the downward inclination angle of the lower edge of the bow is 5-7 degrees to form a front air seal. An integrally-formed air cushion flow guide enclosure shell is arranged on the lower portion of the ship body main frame, the air cushion flow guide enclosure shell, the ship head and the ship tail define an air cushion positive pressure cavity, and a ground effect air cushion is formed through air supply of front and rear duct booster fans to achieve non-contact suspension. The system further comprises a splayed symmetrical four-rotor power system, and four groups of rotor assemblies are fixed through vertical left and right motor mounting brackets to form a main propulsion and posture adjusting unit. Wind resistance is reduced and lifting torque is generated through the bow at a specific angle, air leakage is restrained in cooperation with an air seal structure, and low-wind-resistance, zero-friction suspension and high-stability control are achieved.

The application discloses a double-hull side structure of a large and medium-sized container ship, which is arranged between a hull plate and an inner shell of the container ship, a passage platform is arranged below a main deck, a bilge platform is arranged above a bilge, no other platform is arranged between the passage platform and the bilge platform, two ends of the passage platform are fixedly connected to the hull plate and the inner shell respectively, one end of the bilge platform is fixedly connected to the hull plate, and the middle part of the bilge platform is fixedly connected to the inner shell. The application can save steel material, reduce weight, lower manufacturing cost, reduce construction process and reduce the number of components.

This invention discloses a liquefied gas storage tank and a vessel for transporting liquefied gas. The liquefied gas storage tank includes a main shielding layer that contacts the liquefied gas on one side, a secondary shielding layer disposed on the other side of the main shielding layer, and at least one liquefied gas loading / unloading tower. The base of the liquefied gas loading / unloading tower includes: a lower part of the base body fixedly connected to the bottom wall; a corrugated plate of the secondary shielding layer connected to the lower part of the base body; and a closed end at one end of at least one corrugation of the secondary shielding layer facing the lower part of the base body. An upper part of the base body has mounting holes in the main shielding layer, through which the upper part of the base body is fixedly connected to the lower part of the base body. By opening mounting holes on the flat surface of the main shielding layer to achieve the installation of the pump tower base, the integrity of the corrugated structure of the main shielding layer is fully preserved, ensuring the expansion and contraction performance of the main shielding layer in low-temperature environments and improving the low-temperature sealing reliability of the storage tank.

To provide a drainage structure of a ballast tank in which the drainage time of residual ballast water is not significantly lengthened even if the number of communication holes and their opening areas are reduced.SOLUTION: The total opening area of multiple vertical frame members 17, multiple girder members 11, and multiple communication holes 25 provided in each part of multiple floor members 13 facing each small partition chamber 19 included in 3 or 4 rows of small partition chambers 20Wa-20Wd in the ship width direction, decreases away from the small partition chamber provided with a suction port 21 centered thereon in multiple small partition chambers in a prescribed region centered on the small partition chamber provided with the suction port. The communication hole 25L is not provided in each part of the girder members and the vertical frame members facing a part or all of the small partition chambers among the multiple small partition chambers in the small partition chamber rows in the ship width direction, which are a part or all of the small partition chamber rows 20Wf-20Wh in the ship width direction except for the small partition chamber rows 20Wa-20Wd in the ship width direction.SELECTED DRAWING: Figure 2