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

Gantry crane box girder wind resistance and load reduction bionic structure and design method thereof

A gantry crane and box girder technology, which is applied in the directions of support structure, bottom support structure, design optimization/simulation, etc., can solve the special case study of unsystematic, blank design of wind resistance and load reduction, and no systematic study to reveal the characteristics of wind-induced effects of cranes And other issues

Active Publication Date: 2021-04-16
SOUTHWEST JIAOTONG UNIV
View PDF8 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the occurrence of more and more wind damage accidents, the research on the wind characteristics of crane structures is becoming more and more urgent, but the current research is mostly a single, fragmented special case study, and there is no comprehensive and systematic research to reveal the wind-induced effect characteristics of cranes
At the same time, the wind resistance and load reduction design for the crane structure is still relatively blank

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
  • Gantry crane box girder wind resistance and load reduction bionic structure and design method thereof
  • Gantry crane box girder wind resistance and load reduction bionic structure and design method thereof
  • Gantry crane box girder wind resistance and load reduction bionic structure and design method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0090] In this field, the main girder of a gantry crane generally adopts a box girder structure with a rectangular or trapezoidal section. figure 2A box girder structure of a 40t container gantry crane is given. The box girder of the gantry crane is mainly composed of the upper flange plate 12, the lower flange plate 13, the left web 14 and the right web 15 to form the main body of the box girder. 19 to enhance the local stability of the main girder; the top of the upper flange plate 12 is provided with a trolley track 16, and the trolley track is mostly located on the main web of the box girder (deviating track) or in the middle of the box girder (normal track) to make the overall bearing stability of the box girder ; When the trolley track is located on the main web of the box girder ( figure 2 When being on the right web 15) in the middle, the ear plate 17 for hoisting is arranged below the upper flange plate at its corresponding position.

[0091] The outer web of the ...

Embodiment 2

[0095] The width direction of the box girder of the gantry crane is X, the height direction is Y, and the longitudinal length direction of the box girder is Z direction. Without considering the change in the Z direction, the height of the crane box girder is used as the design variable, and the mathematical model of the X-Y section is obtained by fitting the profile of the mouth of the fish grained boxfish, and then the grained boxfish is constructed on the windward side of the box girder The bionic structure model of the mouth is obtained to obtain the bionic outline.

[0096] However, since the girder of the gantry crane is generally long, it is difficult to achieve a better effect by simply fitting the profile generated by the bionic boxfish mouth without considering the change in the Z direction.

[0097] like Figure 4-Figure 6 As shown, in this embodiment, the cross-section of the boxfish mouth bionic structure 3 perpendicular to the length direction of the box girder i...

Embodiment 3

[0145] Taking the 40t container gantry crane provided in Embodiment 1 as an example, this embodiment provides a method for manufacturing the bionic structure of the gantry crane box girder wind resistance and load reduction provided in Embodiment 2, including the following steps:

[0146] The first step is to obtain the structural parameters of the gantry crane box girder, including the length of the box girder and the height of the box girder; in this embodiment, the height D of the box girder is 2 m, and the length L of the box girder is 40 m.

[0147] In the second step, according to the design method in Example 2, the contour model of the bionic carrier (ie, the bionic structure of the boxfish mouth) is obtained.

[0148] The third step is to use polystyrene foam as the substrate, and process and shape the bionic structure attachment material according to the contour model of the obtained bionic carrier (that is, the bionic structure of the boxfish mouth bionic structure); ...

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 discloses a gantry crane box girder wind resistance and load reduction bionic structure and a design method thereof. The gantry crane box girder wind resistance and load reduction bionic structure is a ostracion cubicus fish mouth bionic structure attached to the windward side of a gantry crane box girder. A streamline cambered surface of the gantry crane box girder wind resistance and load reduction bionic structure avoids separation of boundary layers at the two sides of a web plate at the windward side of the box girder, so that structural disturbance caused by separation of the boundary layers is reduced, the wind-induced load fluctuation amplitude of the box girder structure in a flow field is reduced, and the operation stability of a crane mechanism is improved; and moreover, on the basis that the bearing characteristic and the operation mode of the crane box girder are not changed basically, the streaming characteristic of the box girder is changed in an attaching manner, the downwind wind load of the box girder can be greatly reduced, the wind load reduction amplitude can reach 66.5%, and therefore the cart operation load of a gantry crane is reduced, energy is saved, and emission is reduced.

Description

technical field [0001] The invention belongs to the technical field of large-scale gantry crane design and application, and relates to the design technology of wind resistance and load reduction of a box girder of a gantry crane. Background technique [0002] Wind load refers to the pressure generated by air flow on engineering structures. Since the wind load accounts for 60% to 70% of the load of the running motor of the crane cart, the wind load of the main girder of the crane accounts for 60% to 80% of the wind load of the whole machine. Therefore, wind load is the main load for crane operation and structure check. Moreover, with the continuous expansion of industrial production scale and the continuous improvement of production efficiency and automation level, the structure of cranes continues to develop in the direction of high, large, thin and long. Whether it is in the port quay bridge or in the inland container yard, the influence of wind load on the crane structur...

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 Applications(China)
IPC IPC(8): B66C6/00B66C5/02G06F30/28G06F30/17
CPCY02A40/81
Inventor 程文明王玉璞杜润王书标李杭飞
Owner SOUTHWEST JIAOTONG UNIV
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