A deep-sea bionic pressure-resistant shell

A pressure-resistant shell, deep-sea technology, applied in ships, special-purpose ships, underwater ships, etc., can solve the problems of sacrificing other properties of the pressure-resistant shell, poor mechanical properties, and low material utilization.

Active Publication Date: 2016-11-02
JIANGSU UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the spherical shell has the advantages of good mechanical properties and high material utilization rate, but the space utilization rate is low and the hydrodynamic properties are poor, so it is mainly used in deep-sea submersibles; the cylindrical shell has the characteristics of high space utilization rate and good hydrodynamic properties. , but the material utilization rate is low, the mechanical properties are poor, and internal reinforcement is required, and it is generally used in shallow sea submersibles
In addition, the pressure-resistant shell also includes a water drop structure with good hydrodynamic properties, and a ring structure with strong pressure-resistant properties, but all of them seriously sacrifice other properties of the pressure-resistant shell
It can be seen that the existing pressure shell design level cannot meet or effectively coordinate these performances at the same time, causing a technical bottleneck for the development of deep-sea submersibles

Method used

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  • A deep-sea bionic pressure-resistant shell
  • A deep-sea bionic pressure-resistant shell
  • A deep-sea bionic pressure-resistant shell

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Assuming that the deep-sea bionic pressure shell adopts titanium alloy Ti-6Al-4V (TC4), the allowable stress [σ] is 830MPa, and the material density ρ is 4.5g / cm 3 , The design water depth is 6km, the calculated pressure P is 98MPa, the total length L is 2.453m, and the total width B is 1.835m, then L / B is 1.34; the length L1 of the left end head 1 is 20% of the total length L, and the right end head 3 The length L3 of is 25% of the total length L. According to equation (1), the equation for the radius of rotation of the outer surface of the deep-sea bionic pressure-resistant shell along the long axis is:

[0049] R ( x ) = 1.7843 x 1.355 - x 2 - - - ( 4 )

[0050] Find the first derivative and second derivative respectively:

[0051] R ′ ( x ) = 1.209 x 0.355 - x 1.7843 x 1.355 - x 2 - - - ( 5 )

[0052] R ′ ′ ( x ) = 1 2 · [ 0.858 x - 0.645 ...

Embodiment 2

[0067] Assuming that the deep-sea bionic pressure shell adopts carbon fiber reinforced resin matrix composite material, the allowable stress [σ] is 830MPa, and the material density ρ is 1.6g / cm 3 , The design water depth is 6km, the calculated pressure P is 98MPa, the total length L is 2.453m, and the total width B is 1.835m, then L / B is 1.34; the length L1 of the left end head 1 is 20% of the total length L, and the right end head 3 The length L3 of is 25% of the total length L. According to equation (1), the equation for the radius of rotation of the outer surface of the deep-sea bionic pressure-resistant shell along the long axis is:

[0068] R ( x ) = 1.7843 x 1.355 - x 2 - - - ( 12 )

[0069] Find the first derivative and second derivative respectively:

[0070] R ′ ( x ) = 1.209 x 0.355 - x 1.7843 x 1.355 - x 2 - - - ( 13 )

[0071] R ′ ′ ( x ) = 1 2 · [ ...

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Abstract

The invention discloses a deep-sea bionic pressure-resistant shell, which consists of a left-end head, a right-end head, and a middle shell to form an axisymmetric eggshell-shaped structure with a length of L, a width of B, and a radius of rotation of R(x). Wherein, the thickness t2 of the middle shell is an equal-strength thickening structure, the thickness t1 of the left end cap and the thickness t3 of the right end cap are equal thickness structures respectively, and the left end cap and the middle shell are fixedly connected , the right end head is connected to the middle shell through flange bolts or a movable hatch cover with a sealing ring. The invention has good mechanical properties, space utilization in the shell, hydrodynamic properties, and occupant comfort, and is beneficial to comprehensively improving the safety, carrying capacity, maneuverability, and diving time of the submersible. At the same time, the weight of the pressure-resistant shell is reduced, the reserve buoyancy of the pressure-resistant shell is increased, and the difficulty and cost of processing and manufacturing are reduced.

Description

Technical field [0001] The invention belongs to the field of mechanical structure design, and relates to a submersible, in particular to a bionic pressure-resistant shell used for a deep-sea submersible. Background technique [0002] With the continuous acceleration of marine development and the increasing depth of exploration from offshore to open seas, there are a wide variety of submersibles for various operational purposes and rapid development, mainly used for resource exploration and development, scientific research, military exploration and salvage. As an important part of the submersible, the pressure-resistant shell plays a role in ensuring the normal operation of internal equipment and the health and safety of personnel during the dive, and its weight accounts for 1 / 4-1 / 2 of the total weight of the submersible. The pressure-resistant shell is a thin shell structure that can withstand hydrostatic pressure. It requires good mechanical properties, space utilization in the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B63G8/00B63C11/52
Inventor 张建高杰王明禄王纬波唐文献朱永梅吴文伟晏飞苏世杰
Owner JIANGSU UNIV OF SCI & TECH
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