Dynamic compensation method for curved surface deformation in ship segmental construction

Patent metadata

Field	Value
Publication number	US-12528563-B2
Application number	US-202117617939-A
Country	US
Kind code	B2
Filing date	Apr 2, 2021
Priority date	Apr 24, 2020
Publication date	Jan 20, 2026
Grant date	Jan 20, 2026

Abstract

A dynamic compensation method for curved surface deformation in ship segmental construction includes fitting a curved surface and building a segmental deformation compensation model based on an acquired actual segmentation of a ship to obtain a theoretical height of a jig frame; establishing a correlation between jig frames based on a ship segmental deformation range and a compression load of the ship; and performing segmental deformation compensation according to an actual height and the theoretical height of the jig frame by adopting a preset adaptive regulation and control algorithm of jig frame height. According to the compensation method, a correlation between a reference jig frame and slave jig frames of each level is established.

First claim

What is claimed is:

1 . A dynamic compensation method for curved surface deformation in ship segmental construction, the method comprising the following steps:
step ( 1 ): fitting a curved surface and building a segmental deformation compensation model based on an acquired actual segmentation of a ship to obtain a theoretical height of a jig frame; wherein the step ( 1 ) comprises the following steps:
step ( 11 ): inversely calculating cubic curved surface control points according to acquired discrete points of a ship segmental outer plate;
step ( 12 ): calculating, based on the cubic curved surface control points, a curved surface fitting equation expressed as:

S
⁡
(

u
,
v

)

=

∑

ε
=
0

m

⁢

∑

j
=
0

n

⁢

N

ε
,
k

(
u
)

⁢

N

j
,
k

(
v
)

⁢

V

ε
,
j

⁢

(

0
≤
u

,

v
≤
1

)

wherein k is 3, which is a cubic NURBS curved surface; u and v are formal parameters; m and n are a number of control points in the u and v directions, respectively, and u and v represent horizontal and vertical directions of the curved surface, respectively; V ε,j (ε=0, 1, . . . , m; j=0, 1, . . . , n) is a control grid vertex, and N ε,k (u) and N j,k (v) are irrational B-spline basis functions; and
step ( 13 ): based on the curved surface fitting equation, coordinates of contact points of a movable joint and the segmental outer plate, a lowest inclination angle of the movable joint and a thickness L of the movable joint, performing coordinate transformation on the curved surface fitting equation by using a node insertion method to obtain a segmental deformation compensation model Z l expressed as:

Z
l

=

∑

ε
=
0

m

∑

j
=
0

n

N

ε
,
3

(

u
_

ε
+
k
-
1

+

❘
"\[LeftBracketingBar]"

X
∂

-

p

x
⁢

∂
∂

❘
"\[RightBracketingBar]"

⁢

p
x

∑

ε
=
1

m

❘
"\[LeftBracketingBar]"

x
ε

-

x

ϵ
-
1

❘
"\[RightBracketingBar]"

)

⁢

Assignees

• Univ Jiangsu Science & Tech

Inventors

• Liu Jinfeng
• Zhou Honggen
• Jing Xuwen
• Wang Zhen
• Li Lei
• Tian Guizhong
• Kang Chao
• Chen Yu
• Li Guochao
• He Qiang

Classifications

• G06F30/17

  Mechanical parametric or variational design · CPC title

• G06F30/15 Primary

  Vehicle, aircraft or watercraft design · CPC title

• G06F2119/14

  Force analysis or force optimisation, e.g. static or dynamic forces · CPC title

• G06F2119/18

  Manufacturability analysis or optimisation for manufacturability · CPC title

• B63B73/00 Primary

  Building or assembling vessels or marine structures, e.g. hulls or offshore platforms · CPC title