Ship assembly structural member structural surface judgment method and computer system

Abstract

The invention discloses a method for judging a structural surface of a ship assembly structural member and a computer system. The structural plane judgment method comprises the following steps: acquiring coordinate positions (Xc, Yc and Zc) of the gravity center of an assembly structural member, acquiring spatial coordinate origins (X0, Y0 and Z0) of the assembly structural member where a plate (1) is located, and acquiring normal vectors (A, B and C) of a plate plane; calculating a gravity center distance value dis according to a formula; judging the gravity center distance value, when disgt; when 0, judging that the structural surface of the assembly structural member is in the normal positive direction of the plate; when the result is dislt; and when 0, judging that the structural surface of the assembly structural member is in the negative direction of the normal of the plate. According to the structural surface judgment method and the computer system, the direction of the structural surface of the assembly structural part model can be quickly judged.

Description

Technical Field

[0001] The invention relates to a ship modeling technology, and in particular to a method and a computer system for judging the structural surface of a ship assembly structural component. Background Art

[0002] See also Figure 1 In the process of constructing the ship assembly structure, the plate 1 needs to be laid flat on the ground or on the tire frame, and then the panels are welded together, and then the stiffeners 3 and brackets 2 and other components are installed on the upward side of the panels. The side of the ship assembly structure on which the stiffeners 3 and brackets 2 and other components are installed is called the "structural surface", and the other side of the assembly structure opposite to the structural surface is a plane, which is called the "flat surface".

[0003] The current problem is:

[0004] In computer-aided design software, when modeling assembled structural parts, manual work is often required to determine the structural surfaces and flat surfaces of the assembled structural parts model. This manual implementation method has low work efficiency, low accuracy and lack of intelligence, which limits the further development and innovation of the shipbuilding industry. Summary of the invention

[0005] The object of the present invention is to provide a method and a computer system for determining the structural surface of a ship assembly structure, which can quickly determine the direction of the structural surface of the assembled structure model.

[0006] In order to achieve the above technical objectives, the present invention adopts the following technical solutions:

[0007] A method for determining a structural surface of a ship assembly structure, the method comprising: obtaining a coordinate position (X c ,Y c ,Z c ), obtain the spatial coordinate origin (X0, Y0, Z0) of the assembly structure where the plate is located, and obtain the normal vector (A, B, C) of the plate;

[0008] According to the formula

[0009]

[0010] Calculate the centroid distance value dis;

[0011] The centroid distance value is judged. When dis>0, it is determined that the structural surface of the assembled structural member is in the positive direction of the normal line of the plate; when dis<0, it is determined that the structural surface of the assembled structural member is in the negative direction of the normal line of the plate.

[0012] A computer system is provided with a program capable of implementing the above-mentioned structural surface determination method.

[0013] Compared with the prior art, the structural surface determination method and computer system of the present invention have the following beneficial effects:

[0014] By using the structural surface judgment method and computer system of the present invention, the direction of the structural surface of the assembled structural component model can be quickly judged, thereby greatly reducing the workload of modeling designers, achieving rapid modeling, improving modeling accuracy, and improving design work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of an assembled structural member involved in the structural surface judgment method of an assembled structural member of a ship according to the present invention. DETAILED DESCRIPTION

[0016] The present invention will be further described below with specific embodiments:

[0017] This embodiment provides a method for determining the structural surface of a ship assembly structure. It should be noted that the structural surface determination method of this embodiment is specifically implemented based on a computer-aided design software (CAD) and uses the Python programming language.

[0018] See also Figure 1 The assembled structural parts involved in this embodiment include a plate 1, a reinforcing rib 3 and a toggle plate 2 (please refer to the background technology section for details).

[0019] The structural surface determination method of this embodiment is specifically as follows:

[0020] S1, in computer-aided design software, obtain

[0021] The coordinate position of the center of gravity of the assembled structural model (X c ,Y c ,Z c ),

[0022] as well as,

[0023] The spatial coordinate origin (X0, Y0, Z0) of the assembled structural member where the plate 1 model is located.

[0024] as well as,

[0025] Normal vector (A, B, C) of the model plane of Plate 1.

[0026] It should be noted that the “space coordinate origin (X0, Y0, Z0) of the assembled structure where the plate 1 model is located” specifically refers to the coordinate point of the space reference point of the plate 1 model on the assembled structure.

[0027] S2, according to the formula

[0028]

[0029] To calculate a value, this value is called the center of gravity distance value, and the center of gravity distance value is represented by "dis".

[0030] S3, judging the calculated center of gravity distance value,

[0031] When dis>0, it is determined that the structural surface of the assembled structural component model is in the positive direction of the normal line of the plane of the plate 1;

[0032] When dis<0, it is determined that the structural surface of the assembled structural component model is in the negative direction of the normal line of the plane of the plate 1.

[0033] It should be noted that the structural surface judgment method of this embodiment exists in the form of a computer program in the computer where the computer-aided design software is located. The above computer program can be called in the computer-aided design software to implement the steps of the above structural surface judgment method.

[0034] More specifically, the computer program for implementing the structural surface determination method is compiled using the Python programming language.

[0035] This embodiment also provides a computer system, in which the aforementioned computer-aided design software is running, and the computer system is also provided with a program capable of implementing the above-mentioned structural surface judgment method, and can execute the program to implement the structural surface judgment method.

[0036] The structural surface determination method and computer system of this embodiment have the following advantages:

[0037] By using the structural surface judgment method and computer system of this embodiment, the direction of the structural surface of the assembled structural component model can be quickly determined, thereby greatly reducing the workload of modeling designers, enabling rapid modeling, improving modeling accuracy, and improving design work efficiency.

[0038] Moreover, the structural surface judgment method of this embodiment is conducive to intelligent design segmented production DAP drawing, welding posture judgment and auxiliary rapid assembly modeling, thereby providing a technical basis for realizing intelligent and automated design and greatly improving the efficiency of ship design.

[0039] The above are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Therefore, any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for determining the structural surface of a ship assembly structure, characterized in that: The structural surface determination method comprises: Get the coordinate position of the center of gravity of the assembled structure (X c ,Y c ,Z c ), obtain the spatial coordinate origin (X0, Y0, Z0) of the assembled structural member where the plate (1) is located, and obtain the normal vector (A, B, C) of the plate (1); According to the formula Calculate the centroid distance value dis; Determine the center of gravity distance value. When dis>0, it is determined that the structural surface of the assembled structural member is in the positive direction of the normal line of the plate (1); When dis<0, it is determined that the structural surface of the assembled structural member is in the negative direction of the normal line of the plate (1).

2. A computer system, characterized in that: The computer system is provided with a program capable of implementing the structural surface determination method as claimed in claim 1.

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