Method for comprehensive analysis of force, heat and electricity of functional structure
By combining electromagnetic, thermal, and mechanical finite element analysis with shape reconstruction, the comprehensive analysis problem of electromagnetic functional structures under extreme thermal environments was solved, enabling the electromagnetic performance evaluation of high-speed aircraft and meeting design requirements.
Patent Information
- Application Number
- CN202610403724.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-03-30
- Publication Date
- 2026-06-30
AI Technical Summary
Existing technologies lack the ability to comprehensively analyze the mechanical, thermoelectric, and electromagnetic properties of electromagnetic functional structures under extreme thermal environments, leading to key technological challenges in the design of high-speed aircraft.
By constructing electromagnetic, thermal, and mechanical analysis models of the undeformed functional structure, finite element analysis is performed to obtain various analysis results. Furthermore, through shape reconstruction and RCS performance comparison, a comprehensive mechanical, thermal, and electrical analysis is achieved.
Electromagnetic performance analysis under different force-thermal coupling environments is provided to meet the design requirements of high-speed aircraft and improve the accuracy and reliability of the design.
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Figure CN122310871A_ABST
Abstract
Description
Technical Field
[0001] This application belongs to the field of electromagnetic functional structures, and specifically relates to a comprehensive mechanical, thermoelectric analysis method for functional structures. Background Technology
[0002] With the development of aviation technology, high-speed aircraft have become a new research hotspot for leading aviation nations. During high-speed flight, the surface temperature of an aircraft rises dramatically. Electromagnetic functional structures located at the edges of the fuselage need to withstand extreme thermal environments. Under extreme thermal conditions, material properties change, structures deform, and electromagnetic properties differ significantly from those at room temperature, thus having a significant impact on aircraft performance.
[0003] Currently, due to a lack of relevant testing capabilities, comprehensive mechanical, thermoelectric, and electrical (MTE) tests cannot be conducted on functional structures. The design of functional structures heavily relies on simulation analysis; therefore, conducting comprehensive MTE analysis of functional structures is essential. Current research on comprehensive MTE analysis of electrically large electromagnetic functional structures is relatively limited. Therefore, conducting comprehensive MTE analysis of electromagnetic functional structures has become a critical technical issue that urgently needs to be addressed in the design of high-speed aircraft.
[0004] Therefore, there is an urgent need for a technical solution to overcome or mitigate at least one of the aforementioned defects in the existing technology. Summary of the Invention
[0005] The purpose of this application is to provide a comprehensive mechanical, thermoelectric, and electrical analysis method for functional structures to solve at least one problem existing in the prior art.
[0006] The technical solution of this application is:
[0007] A comprehensive mechanical, thermoelectric, and electrical analysis method for functional structures includes:
[0008] Step S1: Construct an electromagnetic analysis model of the undeformed functional structure, perform electromagnetic finite element analysis, and obtain the first RCS analysis results;
[0009] Step S2: Construct a thermal analysis model of the undeformed functional structure, apply thermal load to the thermal analysis model and perform thermal finite element analysis to obtain the thermal analysis results;
[0010] Step S3: Construct a mechanical analysis model of the undeformed functional structure, import the thermal analysis results into the mechanical analysis model, apply force load to the mechanical analysis model to perform mechanical and thermal finite element analysis, obtain the mechanical and thermal analysis results, and perform post-processing on the mechanical and thermal analysis results to extract node position information;
[0011] Step S4: Reconstruct the shape of the undeformed functional structure based on the node position information to obtain the deformed functional structure;
[0012] Step S5: Construct an electromagnetic analysis model of the deformed functional structure, perform electromagnetic finite element analysis, and obtain the second RCS analysis results;
[0013] Step S6: Compare the first RCS analysis result with the second RCS analysis result to obtain the influence of the thermal load and the force load on the RCS performance of the functional structure.
[0014] In at least one embodiment of this application, in step S1, when performing electromagnetic finite element analysis, material properties, electromagnetic boundary conditions, and solution parameters are set for the electromagnetic analysis model of the undeformed functional structure.
[0015] In at least one embodiment of this application, in step S2, when performing thermal finite element analysis, material properties and thermal boundary conditions are set for the thermal analysis model.
[0016] In at least one embodiment of this application, in step S3, when performing mechanical and thermal finite element analysis, material properties and mechanical boundary conditions are set for the mechanical analysis model.
[0017] In at least one embodiment of this application, in step S4, the undeformed functional structure is reconstructed in CATIA to obtain a CAD model of the deformed functional structure.
[0018] In at least one embodiment of this application, step S4, reconstructing the shape of the undeformed functional structure based on the node position information to obtain the deformed functional structure, includes:
[0019] Slicing of nodes: Determine the slicing direction and interval based on the functional structure type, construct a series of slicing planes, and perform slicing on each node Q. ij Project onto the nearest slice plane to obtain data point Q' ij ;
[0020] Constructing NURBS curves for each cross section: The cumulative chord length parameterization method is used to parameterize the data points of each cross section to obtain the parameter value u. k Calculate the node vector U and basis function N; use Gaussian elimination to obtain the control points P. ij Using nodal vectors U, basis functions N, and control points P, construct cubic NURBS curves C for each cross section. i ;
[0021] Solving the control point mesh of a NURBS surface: On the node vector V, with known control points P ij Using these data points, curve fitting is performed in the longitudinal direction, and the control points P of the longitudinal fitted curve are calculated. ij P is the control point grid of the NURBS surface;
[0022] Constructing the NURBS surface: Using the known node vectors U, V, and control points P, construct the initial NURBS surface S0;
[0023] Further fit the surface: put the data points Q ij Projecting onto the initial surface S0, the maximum error d is obtained. max Compare the maximum error difference d max With tolerance ε, if d max If the value is less than ε, then S0 is the desired reconstructed shape surface; otherwise, insert a new node and repeat the above steps to obtain the reconstructed shape surface S, iterating until d. max Less than ε.
[0024] In at least one embodiment of this application, in step S5, when performing electromagnetic finite element analysis, material properties, electromagnetic boundary conditions, and solution parameters are set for the electromagnetic analysis model of the deformed functional structure.
[0025] In at least one embodiment of this application, step S7 is further included: performing a comprehensive mechanical, thermoelectric analysis of the functional structure based on the first RCS analysis result, the thermal analysis result, the mechanical-thermal analysis result, and the second RCS analysis result.
[0026] The invention has at least the following beneficial technical effects:
[0027] The mechanical, thermo-electric, and electromagnetic integrated analysis method of the functional structure proposed in this application obtains the electromagnetic performance of the electromagnetic functional structure under different mechanical and thermal coupling environments by conducting a comprehensive mechanical, thermo-electric analysis of the electromagnetic functional structure. This method is used for the design and analysis of electromagnetic functional structures to meet the design and analysis requirements of key components of aircraft. Attached Figure Description
[0028] Figure 1 This is a flowchart of a method for comprehensive mechanical, thermoelectric, and electrical analysis of a functional structure according to one embodiment of this application. Detailed Implementation
[0029] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments of this application will be described in more detail below with reference to the accompanying drawings. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are some, but not all, embodiments of this application. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application. The embodiments of this application will be described in detail below with reference to the accompanying drawings.
[0030] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this application.
[0031] The following is in conjunction with the appendix Figure 1 This application will be described in further detail.
[0032] This application provides a comprehensive mechanical, thermoelectric, and electrical analysis method for functional structures, including the following steps:
[0033] Step S1: Construct an electromagnetic analysis model of the undeformed functional structure, perform electromagnetic finite element analysis, and obtain the first RCS analysis results;
[0034] Step S2: Construct a thermal analysis model of the undeformed functional structure, apply thermal load to the thermal analysis model and perform thermal finite element analysis to obtain the thermal analysis results;
[0035] Step S3: Construct a mechanical analysis model of the undeformed functional structure, import the thermal analysis results into the mechanical analysis model, apply force load to the mechanical analysis model to perform mechanical and thermal finite element analysis, obtain the mechanical and thermal analysis results, perform post-processing on the mechanical and thermal analysis results, and extract the node position information.
[0036] Step S4: Reconstruct the shape of the undeformed functional structure based on the node position information to obtain the deformed functional structure;
[0037] Step S5: Construct an electromagnetic analysis model of the deformed functional structure, perform electromagnetic finite element analysis, and obtain the second RCS analysis results;
[0038] Step S6: Compare the results of the first RCS analysis with the results of the second RCS analysis to obtain the influence of thermal load and force load on the RCS performance of the functional structure.
[0039] In the preferred embodiment of this application, such as Figure 1 As shown, firstly, in step S1, an electromagnetic performance analysis model for electromagnetic analysis is constructed based on the CAD model of the undeformed functional structure. Material properties, electromagnetic boundary conditions, and solution parameters are set for the electromagnetic analysis model. The RCS analysis results are obtained by analyzing the electromagnetic problems of the undeformed functional structure.
[0040] Then, in step S2, a thermal conductivity analysis model for thermal analysis is constructed based on the CAD model of the undeformed functional structure. Material properties and thermal boundary conditions are set for the thermal conductivity analysis model, and thermal loads are applied to perform thermal problem analysis to obtain thermal analysis results such as thermal stress and displacement.
[0041] In step S3, a static analysis model for mechanical and thermal analysis is constructed based on the CAD model of the undeformed functional structure. Material properties and mechanical boundary conditions are set for the static analysis model, and the thermal analysis results obtained in step S2 are imported. Force loads are applied to perform mechanical and thermal problem analysis, and node location information is obtained based on the mechanical and thermal analysis results.
[0042] Furthermore, in step S4, the nodes extracted in step S3 of the undeformed functional structure are reconstructed in the CATIA environment to obtain the CAD model of the deformed functional structure.
[0043] In one embodiment of this application, step S4 involves reconstructing the shape of the undeformed functional structure based on the node position information to obtain the deformed functional structure. The process includes:
[0044] Slicing of nodes: Determine the slicing direction and interval based on the functional structure type, construct a series of slicing planes, and perform slicing on each node Q. ij Project onto the nearest slice plane to obtain data point Q' ij The fuselage functional structure is sliced along the heading, while the wing functional structure is sliced along the span, with the slice interval matching the mesh size of the finite element model along the slice direction.
[0045] Constructing NURBS curves for each cross section: The cumulative chord length parameterization method is used to parameterize the data points of each cross section to obtain the parameter value u. k Calculate the node vector U and basis function N; use Gaussian elimination to obtain the control points P. ij Using nodal vectors U, basis functions N, and control points P, construct cubic NURBS curves C for each cross section. i ;
[0046] Solving the control point mesh of a NURBS surface: On the node vector V, with known control points P ij Using these data points, curve fitting is performed in the longitudinal direction, and the control points P of the longitudinal fitted curve are calculated. ij P is the control point grid of the NURBS surface;
[0047] Constructing the NURBS surface: Using the known node vectors U, V, and control points P, construct the initial NURBS surface S0;
[0048] Further fit the surface: put the data points Q ijProjecting onto the initial surface S0, the maximum error d is obtained. max Compare the maximum error difference d max With tolerance ε, if d max If the value is less than ε, then S0 is the desired reconstructed shape surface; otherwise, insert a new node and repeat the above steps to obtain the reconstructed shape surface S, iterating until d. max Less than ε.
[0049] In step S5, an electromagnetic analysis model is constructed for the CAD model of the deformed functional structure. When performing electromagnetic finite element analysis, material properties, electromagnetic boundary conditions, and solution parameters are set for the electromagnetic analysis model of the deformed functional structure to perform electromagnetic problem analysis and obtain RCS analysis results.
[0050] In step S6, by comparing the RCS analysis results of the undeformed functional structure and the deformed functional structure, the influence of thermal load and force load on the RCS performance of the functional structure is obtained.
[0051] Finally, step S7 is also included: based on the first RCS analysis results, thermal analysis results, mechanothermal analysis results, and second RCS analysis results, a comprehensive mechanothermal-electric analysis of the functional structure is achieved.
[0052] This application presents a comprehensive mechanical, thermo-electrical analysis method for functional structures, addressing the problem that current methods for analyzing the electrical performance of electromagnetic functional structures, typically limited to room-temperature conditions, cannot meet the design requirements of high-speed aircraft. By employing the proposed method, this application conducts a comprehensive mechanical, thermo-electrical analysis of electromagnetic functional structures, obtaining their electromagnetic performance under different mechanical-thermal coupling environments. This provides an effective and reliable method for high-speed aircraft design, fulfilling its design requirements. This method has already been applied in project research and has achieved good results.
[0053] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.
Claims
1. A comprehensive mechanical, thermoelectric, and electrical analysis method for functional structures, characterized in that, include: Step S1: Construct an electromagnetic analysis model of the undeformed functional structure, perform electromagnetic finite element analysis, and obtain the first RCS analysis results; Step S2: Construct a thermal analysis model of the undeformed functional structure, apply thermal load to the thermal analysis model and perform thermal finite element analysis to obtain the thermal analysis results; Step S3: Construct a mechanical analysis model of the undeformed functional structure, import the thermal analysis results into the mechanical analysis model, apply force load to the mechanical analysis model to perform mechanical and thermal finite element analysis, obtain the mechanical and thermal analysis results, and perform post-processing on the mechanical and thermal analysis results to extract node position information; Step S4: Reconstruct the shape of the undeformed functional structure based on the node position information to obtain the deformed functional structure; Step S5: Construct an electromagnetic analysis model of the deformed functional structure, perform electromagnetic finite element analysis, and obtain the second RCS analysis results; Step S6: Compare the first RCS analysis result with the second RCS analysis result to obtain the influence of the thermal load and the force load on the RCS performance of the functional structure.
2. The method for comprehensive mechanical, thermoelectric, and electrical analysis of functional structures according to claim 1, characterized in that, In step S1, when performing electromagnetic finite element analysis, material properties, electromagnetic boundary conditions, and solution parameters are set for the electromagnetic analysis model of the undeformed functional structure.
3. The method for comprehensive mechanical, thermoelectric, and electrical analysis of functional structures according to claim 2, characterized in that, In step S2, when performing thermal finite element analysis, material properties and thermal boundary conditions are set for the thermal analysis model.
4. The method for comprehensive mechanical, thermoelectric, and electrical analysis of functional structures according to claim 3, characterized in that, In step S3, when performing the mechanical and thermal finite element analysis, material properties and mechanical boundary conditions are set for the mechanical analysis model.
5. The method for comprehensive mechanical, thermoelectric, and electrical analysis of functional structures according to claim 4, characterized in that, In step S4, the shape of the undeformed functional structure is reconstructed in CATIA to obtain the CAD model of the deformed functional structure.
6. The method for comprehensive mechanical, thermoelectric, and electrical analysis of functional structures according to claim 5, characterized in that, In step S4, the undeformed functional structure is reconstructed based on the node position information to obtain the deformed functional structure, including: Slicing of nodes: Determine the slicing direction and interval based on the functional structure type, construct a series of slicing planes, and perform slicing on each node Q. ij Project onto the nearest slice plane to obtain data point Q' ij ; Constructing NURBS curves for each cross section: The cumulative chord length parameterization method is used to parameterize the data points of each cross section to obtain the parameter value u. k Calculate the node vector U and basis function N; use Gaussian elimination to obtain the control points P. ij Using nodal vectors U, basis functions N, and control points P, construct cubic NURBS curves C for each cross section. i ; Solving the control point mesh of a NURBS surface: On the node vector V, with known control points P ij Using these data points, curve fitting is performed in the longitudinal direction, and the control points P of the longitudinal fitted curve are calculated. ij P is the control point grid of the NURBS surface; Constructing the NURBS surface: Using the known node vectors U, V, and control points P, construct the initial NURBS surface S0; Further fit the surface: put the data points Q ij Projecting onto the initial surface S0, the maximum error d is obtained. max Compare the maximum error difference d max With tolerance ε, if d max If the value is less than ε, then S0 is the desired reconstructed shape surface; otherwise, insert a new node and repeat the above steps to obtain the reconstructed shape surface S, iterating until d. max Less than ε.
7. The method for comprehensive mechanical, thermoelectric, and electrical analysis of functional structures according to claim 6, characterized in that, In step S5, when performing electromagnetic finite element analysis, material properties, electromagnetic boundary conditions, and solution parameters are set for the electromagnetic analysis model of the deformed functional structure.
8. The method for comprehensive mechanical, thermoelectric, and electrical analysis of functional structures according to claim 7, characterized in that, It also includes step S7, which involves performing a comprehensive mechanical, thermoelectric, and electrical analysis of the functional structure based on the first RCS analysis result, the thermal analysis result, the mechanical-thermal analysis result, and the second RCS analysis result.