Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A Flutter Model Design Method for Cylindrical Objects Without Independent Counterweight Space

A flutter model and design method technology, applied in computing, special data processing applications, instruments, etc., can solve problems such as insufficient counterweight space, and achieve the effect of increasing counterweight quality and expanding counterweight space

Active Publication Date: 2017-06-16
SHENYANG AIRCRAFT DESIGN INST AVIATION IND CORP OF CHINA
View PDF9 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The disadvantage of the previous flutter model design is that the space and quality of the model need to be coordinated, that is, there is enough counterweight margin and enough counterweight space
However, when the space and quality of the model are not coordinated, especially when there is insufficient counterweight space due to excessive counterweight allowance, the previous design method will not work.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A Flutter Model Design Method for Cylindrical Objects Without Independent Counterweight Space
  • A Flutter Model Design Method for Cylindrical Objects Without Independent Counterweight Space
  • A Flutter Model Design Method for Cylindrical Objects Without Independent Counterweight Space

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0017] The present invention will be described in further detail below through specific embodiments and in conjunction with the accompanying drawings.

[0018] 1. Design stiffness: The stiffness of the model is guaranteed by the skeleton, such as figure 2 As shown, the skeleton use density of this example is 2.8g / cm 3 7075, surface anodized, it is a straight rod slightly smaller than the length of the cylinder, the cross section is square, and its side length is the only variable; two exposed platforms with holes are used to simulate the connection with other models, the platform The size is subject to sufficient and non-protruding shape, which can be designed as appropriate; on the calculation software, under the free-free working condition, in the finite element model established by the combination of skeleton stiffness and target object mass, its first order The error of the first-order natural frequency after the conversion of the natural frequency and the target object ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention belongs to the field of aircraft design, and relates to a method for designing a flutter model of a cylindrical object without an independent counterweight space. The frequency and modal similarity between the vibration model and the target object are above 95%; second, the design shape: the aerodynamic shape of the flutter model and the target object are consistent; third, the design quality: the mass, center of mass and The similarity of the moment of inertia is above 95%, and the shape-shifting counterweight replaces part of the design shape. The beneficial effect is: while taking into account the original design idea, the counterweight space is expanded, the counterweight mass is increased, and the flutter model of the cylindrical object without independent counterweight space has design feasibility.

Description

technical field [0001] The invention belongs to the field of aircraft design and relates to a method for designing a flutter model of a cylindrical object without an independent counterweight space. Background technique [0002] In the field of aircraft design, the design method of the flutter model of the cylinder without independent counterweight space is improved. Generally, when designing the flutter model, the step of designing the mass, that is, the counterweight, is carried out separately, and the model has an independent counterweight space. How much counterweight is needed can be directly added to the corresponding counterpoint on the flutter model. [0003] The disadvantage of the previous flutter model design is that the space and quality of the model need to be coordinated, that is, there is enough balance weight margin and enough space for weight balance. However, when the space and quality of the model are not coordinated, especially when there is insufficient...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50
Inventor 唐振亮脱朝智张辉钱卫吴江鹏
Owner SHENYANG AIRCRAFT DESIGN INST AVIATION IND CORP OF CHINA
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com