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A Computer Aided Design Method for Egg-shaped Shell Line

A computer-aided design method technology, applied in computing, special data processing applications, instruments, etc., can solve problems such as curvature mutations, coincidence degree restrictions, and point mutations

Active Publication Date: 2018-03-06
王开明
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the first case, a large number of practices have shown that it is almost impossible to find a clothoid curve segment that meets the specific design requirements and form a perfect egg-shaped curve after insertion; in the second and third cases, the formed egg-shaped curves exist to varying degrees. Sudden changes in curvature, or combined point mutations; it is relatively simple to use elliptical lines to form egg-shaped curves, but the degree of compliance with actual needs is often limited, so the design of egg-shaped shell lines and egg-shaped containers is still relatively difficult
[0003] To sum up, the oval curve has a wide demand in engineering construction design, but the design and calculation method of the oval curve has not been solved well, so its application and development are limited.

Method used

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  • A Computer Aided Design Method for Egg-shaped Shell Line
  • A Computer Aided Design Method for Egg-shaped Shell Line
  • A Computer Aided Design Method for Egg-shaped Shell Line

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0184] Egg shell linetype calculation example

[0185] Design requirements: It is required to design an egg-shaped butterfly shell with a diameter of about 65 meters, a center height of about 12 meters, and an edge height of about 3 meters.

[0186] refer to figure 2 with Image 6 , the specific design calculation:

[0187] (1) According to the design requirements, establish a rectangle with a long side length of 65 meters and a short side length of 12 meters; establish a coordinate system with the center of the rectangle, the vertical axis is the X axis, and the horizontal axis is the Y axis; design calculation A large circle on the positive semi-axis of the X axis and a small circle on the positive semi-axis of the Y axis are used.

[0188] Select the great circle radius by trial calculation: R 1 = 160 meters; since the edge height is limited to 3 meters, the radius of the small circle is selected: R 2 = 3 meters; the intersection points of the four arcs, the tangent p...

Embodiment 2

[0296] Calculation example of structural line design of egg-shaped container

[0297] Design requirements: It is required to design an egg-shaped container with a maximum diameter of about 28 meters and a height of about 42 meters. The top of the egg-shaped container has a smaller radius, and the radius of the bottom curve is slightly larger than the top of the egg-shaped container.

[0298] refer to image 3 , Figure 4 , Figure 5 , Figure 7 with Figure 8 , the specific design and calculation steps are as follows:

[0299] (1) According to the design requirements, establish a rectangle with a length of 42 meters on the long side and a length of 28 meters on the short side, and adopt a vertical type; use the point 22 meters below the top of the rectangle as the maximum diameter of the middle abdomen and the center of the short side to establish a coordinate system , the vertical axis is the X axis, and the horizontal axis is the Y axis; the upper half of the container ...

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Abstract

The invention relates to a computer-aided design method for the line shape of an egg-shaped shell, relates to the technical field of computer-aided design of egg-shaped curves, and provides a reliable and universally applicable calculation method for the computer-aided design of the line shape of an egg-shaped shell. The design method of the present invention is to establish a rectangle according to the geometric size requirements of the oval shell to be designed, and use the computer software Excel form to calculate the parameters and coordinates of the intermediate transition curve, and in the CAD basic graphics, calculate the point-by-point coordinates of the intermediate transition curve as the result data Import to generate ovoid shell linetype. The computer-aided design method of the present invention not only easily designs the line shape of the egg-shaped shell, but also easily designs the line shape of the shell of the egg-shaped container and the oval curve formed by the design method of the line shape of the structure of the egg-shaped component.

Description

technical field [0001] The invention relates to the technical field of computer-aided design of egg-shaped curves, in particular to a method for computer-aided design of egg-shaped shell lines. Background technique [0002] Oval bodies and egg-shaped curves are ubiquitous in nature. Because of their good mechanical properties and smooth and beautiful lines, they have a wide range of application requirements in engineering. However, due to the existence of egg-shaped curves in design calculations, there is no reliable and universal Applicable methods, limited practical application. The key to the linear design of the egg-shaped shell is to solve the design of the egg-shaped curve that constitutes the egg-shaped shell. The current method of forming an egg-shaped curve is to insert a segment of the intercepted clothoid curve; the second is to insert a transition between the large circle and the small circle. Circular curve; the third is the splicing of circular curves with dif...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50
Inventor 王开明
Owner 王开明
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