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Design and processing method suitable for extremely light mass delivery model

A processing method and model technology, applied in the aviation field, can solve the problems of time-consuming and labor-intensive, inapplicability, model design and processing quality experience have a great influence

Active Publication Date: 2021-06-04
CHENGDU AIRCRAFT INDUSTRY GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The entire design and processing process is time-consuming and labor-intensive. Generally, it takes a few days or even longer to design a state of the launch model, and it may take several months to design and process the entire set of launch models.
The model design and processing quality are greatly affected by the experience of the operator, and the quality control is unstable
And this method is only applicable to delivery models with relatively high quality, and this method is not applicable to delivery models with extremely light weight after scaling

Method used

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  • Design and processing method suitable for extremely light mass delivery model
  • Design and processing method suitable for extremely light mass delivery model
  • Design and processing method suitable for extremely light mass delivery model

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0071] The flow sequence of the whole method is design module-component additive manufacturing-component assembly. The design module includes two subroutines, the mass characteristic calculation module and the mass characteristic design module.

[0072] The mass characteristic calculation module calculates the weight, center of gravity and moment of inertia of the model according to the model scale ratio and dynamic similarity criterion, and uses the calculated weight, center of gravity and moment of inertia as the target parameters of the mass characteristic design module.

[0073] The core idea of ​​the mass characteristic calculation module is: hollow out the middle of the solid body model to form a shell, and the hollowed out part is continuous, and the basic thickness requirements of the shell must be guaranteed, and its shape is not limited. Place the filling part inside the hollowed part. The filling part can use materials of different densities. The filling part is con...

Embodiment 2

[0083] A design and processing method suitable for an extremely light mass delivery model, characterized in that it includes design and processing steps, and is characterized in that it manages to include the following modules: mass characteristic calculation module, mass characteristic design module, component additive manufacturing and model assembly, Its design method steps are as follows:

[0084] (1) First divide the parts into blocks, define the model entity without any operation as a solid part, define the excavated part as a hollow part, and define the filled part as a filled part;

[0085] (2) Then the cross-sectional profile and axial profile of the solid part are described by the profile formed by point Ai and the profile formed by point a respectively, and the cross-sectional profile and axial profile of the hollowed out part are described by the profile formed by point Bi and point b respectively Formed profile description, the cross-sectional profile and axial pr...

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Abstract

The invention belongs to a design and processing method suitable for an extremely light mass delivery model. The design and processing method is characterized in that the process sequence of the whole method comprises a design module, part additive manufacturing and part assembling, and wherein the design module comprises two subprograms of a mass characteristic calculation module and a mass characteristic design module; the mass characteristic calculation module calculates the weight, the gravity center and the rotational inertia of the model according to the model scaling proportion and the dynamic similarity criterion, and takes the calculated weight, gravity center and rotational inertia as target parameters of the mass characteristic design module. The core idea of the mass characteristic calculation module is that the middle of a solid body model is hollowed to form a shell, the hollowed-out part is continuous, the basic thickness requirement of the shell needs to be met, and the shape is not limited. The filling part is placed in the hollowed out part, and the contour shapes of the hollowed out part and the filling part are iteratively calculated by adopting a self-adaptive program so as to configure the weight, the gravity center and the rotational inertia of the model to meet the requirements of a design target.

Description

technical field [0001] The invention belongs to the field of aviation technology, and in particular relates to a design and processing method suitable for an extremely light weight delivery model. Background technique [0002] When external storage items such as auxiliary fuel tanks, missiles, bombs, weather detectors, air cargo, etc. are dropped from the carrier aircraft, they are in the aircraft interference flow field at the initial stage of separation from the carrier aircraft. Many factors are closely related to the speed, the flight height of the carrier aircraft, the attitude of the carrier aircraft, the shape of the external store, the installation position and attitude of the external store on the carrier aircraft, and the initial delivery speed. Therefore, it is difficult to accurately obtain the trajectory and attitude of the dropped object at the initial moment of leaving the carrier aircraft by means of theoretical or simulation calculations. In order to unders...

Claims

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Application Information

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IPC IPC(8): G06F30/17G06F30/20G06F111/06G06F113/10
CPCG06F30/17G06F30/20G06F2111/06G06F2113/10
Inventor 陈瑶李锐冯文梁夏生林赵艳平陈蕊李涛陈斌
Owner CHENGDU AIRCRAFT INDUSTRY GROUP
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