CN-121980810-A - Method, device, equipment and medium for evaluating shielding effectiveness of cable

Abstract

The application relates to the technical field of cables and discloses a method, a device, equipment and a medium for evaluating shielding effectiveness of a cable, wherein the method comprises the steps of constructing a coaxial body of the cable to be simulated and analyzed; the method comprises the steps of constructing pore units used for simulating pores among single braiding wires, obtaining a pore unit set by distributing a plurality of pore units around a shaft, periodically placing the pore unit set in a coaxial body based on the coaxial central axis of the coaxial body to obtain a shielding layer with periodic pores, simulating the coaxial body containing the shielding layer by adjusting parameters of the pore units to simulate different braiding densities, and obtaining an evaluation result. The method realizes efficient and systematic development of multi-parameter study and performance optimization of the influence of the knitting density on the shielding effectiveness, and solves the technical problem of how to efficiently and accurately simulate the influence of different knitting densities on the shielding effectiveness.

Inventors

• SHEN YUANZHE
• LOU XUHUA
• ZHOU HONGTAO

Assignees

• 浙江凌艾未来科技有限公司
• 浙江零跑科技股份有限公司

Dates

Publication Date

20260505

Application Date

20260205

Claims (10)

1. 1. A method of evaluating shielding effectiveness of a cable, the method comprising: constructing a coaxial body of a cable to be simulated and analyzed; constructing pore units for simulating pores among single braiding wires, and obtaining a pore unit set by distributing a plurality of pore units around an axis; periodically placing the pore unit set in the coaxial body based on the coaxial central axis of the coaxial body to obtain a shielding layer with periodic pores; And simulating the coaxial body containing the shielding layer by adjusting parameters of the pore units to simulate different programming densities so as to obtain an evaluation result.
2. 2. The method of claim 1, wherein said obtaining a set of void cells by distributing a plurality of said void cells about an axis comprises: based on the bottom diagonal of the pore unit as a rotation axis, a plurality of pore units placed at different angles are generated around the circumferential direction of the rotation axis, so that a pore unit set is obtained.
3. 3. The method of claim 2, wherein the rotation angles of the resulting spaces between the plurality of void cells are equal.
4. 4. The method of claim 1, wherein the void cells have a height that is greater than an outside diameter of the coaxial body.
5. 5. The method of claim 1, wherein the periodically placing the set of void cells on the coaxial body comprises: determining a central axis of the coaxial body as a reference; And periodically and horizontally placing the pore unit set in the length direction of the reference, wherein the center point of the pore unit set is positioned on the reference.
6. 6. The method of claim 5, wherein the periodically placing the set of void cells horizontally comprises: The projections between the odd-numbered sequences and the even-numbered sequences are staggered.
7. 7. The method according to claim 6, comprising: Projection coincidence is carried out among the odd-numbered pore unit sets; Projection coincidence is carried out among pore unit sets of the even number sequence; the projections of the odd-numbered sequence pore unit sets and the even-numbered sequence pore unit sets are staggered.
8. 8. An evaluation device of shielding effectiveness of a cable, the device comprising: The coaxial body determining unit is used for constructing a coaxial body of the cable to be simulated and analyzed; A void cell set determining unit for constructing void cells for simulating voids between individual braid wires, the void cell set being obtained by distributing a plurality of the void cells around an axis; A shielding layer determining unit for periodically placing the pore unit set in the coaxial body based on the coaxial central axis of the coaxial body as a reference to obtain a shielding layer with periodic pores; and the textile density determining unit is used for simulating the coaxial body containing the shielding layer by adjusting the parameters of the pore unit to simulate different programming densities so as to obtain an evaluation result.
9. 9. A computer device, comprising: A memory and a processor, the memory and the processor being communicatively connected to each other, the memory having stored therein computer instructions, the processor executing the computer instructions to perform the method of evaluating cable shielding effectiveness of any one of claims 1 to 7.
10. 10. A computer-readable storage medium, having stored thereon computer instructions for causing a computer to perform the method of evaluating cable shielding effectiveness according to any one of claims 1 to 7.

Description

Method, device, equipment and medium for evaluating shielding effectiveness of cable Technical Field The application relates to the technical field of cables, in particular to a cable shielding effectiveness evaluation method, device, equipment and medium. Background The simulation modeling method of the braided structure is mainly based on two ideas, namely an ideal uniform layer model, a braided layer is simplified into a continuous metal tubular structure without holes, the method is simple in calculation and low in cost, but the actual hole structure is completely ignored, so that shielding effectiveness obtained by simulation is obviously higher than that of a real situation especially under a higher frequency (such as >1 GHz) and cannot reflect influence caused by braiding density change, and a random wire harness model approximates to a real braiding form by establishing a large number of thin cylinders which are randomly distributed and interweaved with each other, is theoretically closer to physical reality, but also has a series of outstanding problems that geometric modeling is complex, a random interweaving structure is generated depending on a specific script or skill, grid division is difficult, unit quantity is increased due to a large number of small and randomly distributed wire harnesses, grid quality is difficult to control, calculation cost is high, model size is huge, solving is slow, memory consumption is large, parameterization adjustment is complicated, parameter changes such as braiding density are required to reconstruct the whole random geometry, and systematic parameter study is difficult to support. Therefore, solving how to efficiently and accurately simulate the influence of different braid densities on shielding effectiveness is a technical problem that needs to be solved currently. Disclosure of Invention The application provides a method, a device, equipment and a medium for evaluating shielding effectiveness of a cable, which solve the technical problem of how to efficiently and accurately simulate the influence of different weaving densities on shielding effectiveness. In order to achieve the above purpose, the main technical scheme adopted by the application comprises the following steps: in a first aspect, an embodiment of the present application provides a method for evaluating shielding effectiveness of a cable. The method comprises the following steps: constructing a coaxial body of a cable to be simulated and analyzed; constructing pore units for simulating pores among single braiding wires, and obtaining a pore unit set by distributing a plurality of pore units around an axis; periodically placing the pore unit set in the coaxial body based on the coaxial central axis of the coaxial body to obtain a shielding layer with periodic pores; And simulating the coaxial body containing the shielding layer by adjusting parameters of the pore units to simulate different programming densities so as to obtain an evaluation result. The embodiment provides an evaluation method of cable shielding effectiveness, which takes the central axis of a coaxial body as a geometric standard, simulates microscopic pores among single braiding wires by constructing pore units capable of being controlled in a parameterization manner, and periodically arranges and staggers projection of a plurality of pore units around the axis, so that a periodic shielding layer structure capable of equivalently representing different braiding densities is formed. By independently adjusting the cross-sectional dimensions (e.g., width and length) of the void cells, a series of simulation models with different equivalent braid densities can be quickly created. The modeling strategy realizes high simplification and grid optimization geometrically, and greatly reduces the resources required by single simulation. Under the common calculation condition, the multi-parameter research and performance optimization of the influence of the knitting density on the shielding effectiveness can be carried out in a high-efficiency and systematic way, and the technical problem of how to simulate the influence of different knitting densities on the shielding effectiveness in a high-efficiency and accurate way is solved. In one embodiment, said obtaining a set of void cells by distributing a plurality of said void cells around an axis comprises: based on the bottom diagonal of the pore unit as a rotation axis, a plurality of pore units placed at different angles are generated around the circumferential direction of the rotation axis, so that a pore unit set is obtained. The present embodiment significantly reduces simulation costs by distributing a plurality of void cells around an axis to obtain a collection of void cells. In contrast, the random harness model needs to independently define the position and the trend for each harness, has a plurality of parameters and is difficult to regularize, so that the modeling and calculati