Low-rigidity pull pressure pad structure for realizing uniform loading of radome
A technology of uniform loading and low stiffness, applied in the direction of applying stable tension/pressure to test material strength, connecting components, strength characteristics, etc. Good air permeability, ensuring the effect of bonding quality
Inactive Publication Date: 2019-12-13
THE RES INST FOR SPECIAL STRUCTURES OF AERONAUTICAL COMPOSITE AVIC
View PDF3 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0003] Purpose of the invention: When a large load is applied to the surface of a large-curvature radome for a traditional wood block / steel plate combination structure, the wood block / steel plate combination structure in the loading process occurs due to the unsatisfactory bonding surface between the wood block / steel plate combination structure and the radome. Problems of adhesive peeling and partial delamination of radome; a uniformly loaded low-stiffness tension-compression pad structure is proposed
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 moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0017] See attached figure 1 , figure 2 , a low-rigidity tension and pressure pad structure to achieve uniform loading of the radome. The structure is composed of three parts, namely a plurality of symbol-shaped polyurethane blocks, a transitional steel plate and a pull ring; the polyurethane block and the pull ring are respectively connected to both sides of the transition steel plate The pull ring is set at the resultant force point of the loading zone; the resultant force point coincides with the center of gravity of the steel plate to ensure uniform force and avoid partial force damage to the radome. On the basis of the structural design, the specific implementation process can be further improved in combination with the actual application environment and requirements. The specific improvements are as follows:
[0018] In the pull-and-press pad structure, the polyurethane block and the transitional steel plate are bonded together as a whole, and adhesives are used for bo...
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
| Property | Measurement | Unit |
|---|---|---|
| Spacing | aaaaa | aaaaa |
Login to View More
Abstract
The invention belongs to the field of experimental mechanics, and particularly relates to a low-rigidity pull pressure pad structure for realizing uniform loading of a radome. The structure is composed of a plurality of symbol-shaped polyurethane blocks, a transition steel plate and a pull ring; the polyurethane blocks and the pull ring are respectively connected to both surfaces of the transitionsteel plate; and the pull ring is arranged at a resultant force point of a loading subarea, and the resultant force point is overlapped with the gravity center of the steel plate. The structure proposed by the invention can solve the problems that the stress of the radome is too concentrated when a canvas belt applies a load, and that the load is locally strengthened when a wooden block / steel structure applies the load, the uniform application of the load of the radome can be guaranteed, and the local rigidity of the radome is not changed; and in addition, since the pull pressure pad structure designed by the patent is composed of the plurality of polyurethane blocks with small bonding areas, and a certain gap is reserved between each polyurethane block, compared with an entire large polyurethane block, the air permeability is good, and the bonding quality is ensured.
Description
technical field [0001] The invention belongs to the field of test mechanics, and in particular relates to a low-rigidity tension and pressure pad structure for realizing uniform loading of a radome, and the structure can be used for applying loads in a radome static test. Background technique [0002] In the static test design of the radome, it is necessary to simplify the aerodynamic load in flight into multiple partitioned test loads, and the simplified load is applied in the form of concentrated force. At present, when applying load to the radome, the loading canvas belt and the combined tension and pressure pad of wood block / steel plate are mostly used for load transmission. The loading canvas belt is flexible, sewn, and sheet-like. The problem of too concentrated loading on the belt sewing line will cause the test load of the radome to be too severe, and there will also be a problem that the damage of the canvas belt along the sewing line will affect the test when the l...
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
Login to View More IPC IPC(8): G01N3/08G01N3/02F16B11/00
CPCF16B11/006G01N3/02G01N3/08
Inventor 曲秀晓周春苹
Owner THE RES INST FOR SPECIAL STRUCTURES OF AERONAUTICAL COMPOSITE AVIC