A method for dynamic design of layered subgrade under impact load of airplane

Abstract

This invention relates to the field of airport runway engineering technology, and in particular to a dynamic design method for layered runway foundations under aircraft impact loads. The method includes the following steps: acquiring impact response data, which is time-series data of the dynamic response generated in different structural layers under aircraft impact loads; classifying the aircraft impact load action mode into several impact modes based on the distribution characteristics of the impact response data; obtaining the first acting structural layer for each impact mode based on the differences in impact response generated in different structural layers for each impact mode; constructing virtual damping agents for different structural layers based on each impact mode and its corresponding first acting structural layer, wherein any virtual damping agent is used to characterize the damping demand characteristics of a structural layer under one or a set of impact modes; jointly scheduling the damping configuration of different structural layers according to the virtual damping agents of different structural layers, and generating damping design parameters for different structural layers based on the damping configurations of different structural layers.

Description

Technical Field

[0001] This invention relates to the field of airport runway engineering technology, and in particular to a dynamic design method for layered runway subgrade under aircraft impact loads. Background Technology

[0002] With the widespread use of large transport aircraft, wide-body passenger aircraft, and high-frequency takeoff and landing operations, aircraft exert significant impact loads on airport runway structures during landing, taxiing, and braking. These impact loads are characterized by short duration, large amplitude, and complex frequency components, easily inducing significant dynamic responses in layered structures such as the runway surface layer, base layer, and pavement subgrade, leading to structural fatigue accumulation, localized damage, and even a decline in overall service performance.

[0003] In practical engineering, airport runway subgrades typically employ multi-layered structures, with significant differences in material properties, structural stiffness, and damping characteristics between different layers. Under aircraft impact loads, the response and attenuation mechanisms of each structural layer to impact energy are not consistent. If the dynamic design is inadequate, it can easily lead to vibration concentration or stress amplification in certain layers, thereby shortening the service life of the subgrade structure and increasing maintenance costs.

[0004] Existing airport runway subgrade design methods are mostly based on static or quasi-static load analysis, typically using amplification factors or empirical safety factors to indirectly consider the dynamic impact of aircraft loads. These methods struggle to accurately reflect the time and frequency domain variations of aircraft impact loads and cannot precisely describe the dynamic behavior of impact load propagation, attenuation, and superposition within layered subgrade structures. Furthermore, while some existing technologies incorporate dynamic analysis methods, they often simplify aircraft impact loads to a single equivalent impact or a uniform dynamic input form, failing to fully consider the differentiated impacts of different frequency components in the impact response on various structural layers. Summary of the Invention

[0005] In one embodiment of the present invention, the dynamic design method for layered runway foundations under aircraft impact loads includes the following steps: Acquire impact response data, which is the time series data of dynamic response generated in different structural layers under aircraft impact load; Based on the distribution characteristics of the impact response data, the aircraft impact load action mode is divided into several impact modes; Based on the differences in impact response generated by each impact mode in different structural layers, the first acting structural layer of each impact mode is obtained; Based on each impact mode and its corresponding first action structural layer, virtual damping agents for different structural layers are constructed respectively. Any of the virtual damping agents is used to characterize the damping demand characteristics of a structural layer in one or a set of impact modes. Based on the virtual damping agents of the different structural layers, the damping configurations of the different structural layers are jointly scheduled. Based on the damping configuration of the different structural layers, damping design parameters for the different structural layers are generated.

[0006] In some embodiments, classifying the aircraft impact load action mode into several impact modes based on the distribution characteristics of the impact response data includes the following steps: Based on the differences in the distribution of impact response data in the time dimension and structural layer dimension, the impact response characteristics of different aircraft impact loads in different structural layers are obtained. Based on the impact load action mode that exhibits different impact response characteristics in different structural layers, different impact modes are determined.

[0007] In some embodiments, the impact response characteristics include response intensity, duration, or energy concentration.

[0008] In some embodiments, the first action structure layer for any impact mode is determined by the following steps: Based on the impact response data of different structural layers under this impact mode, the impact response characteristics of different structural layers under this impact mode are obtained. Based on the differences in the impact response characteristics of the different structural layers, the structural layer that exhibits the most significant impact response under this impact mode is determined as the first acting structural layer of this impact mode.

[0009] In some embodiments, the structural layer with the most significant impact response is the structural layer that exhibits relatively prominent performance in at least one or more of the impact response characteristics of different structural layers, such as response intensity, duration characteristics, or energy concentration.

[0010] In some embodiments, the virtual damping agent of any structural layer in the process of constructing virtual damping agents for different structural layers based on each impact mode and its corresponding first action structural layer is generated through the following steps: Based on one or more impact modes corresponding to the structural layer as the first functional structural layer, the impact response characteristics of the structural layer under the one or more impact modes are obtained. Based on the impact response characteristics under one or more impact modes, damping demand characterization information is determined. The damping demand characterization information is used to reflect the damping demand of the structural layer for vibration suppression, energy dissipation or impact mitigation under one or more impact modes. The damping demand characterization information is associated with the structural layer and its corresponding one or more impact modes to generate a corresponding virtual damping agent.

[0011] In some embodiments, the step of jointly scheduling the damping configurations of different structural layers based on the virtual damping agents of different structural layers includes the following steps: Based on the virtual damping agents corresponding to different structural layers, the damping demand characterization information of each structural layer under the corresponding impact mode is obtained respectively. Based on the damping demand characterization information, identify one or more structural layers that require damping configuration under the same impact mode; Under the premise of ensuring overall dynamic response coordination under the same impact mode, the damping configuration of one or more identified structural layers is coordinated and allocated. Based on the collaborative allocation results, damping configuration results for different structural layers are generated.

[0012] In some embodiments, the coordinated allocation of damping configurations for one or more identified structural layers includes the following steps: During the coordinated distribution process, the damping configuration of any structural layer is constrained to not exceed the dynamic response bearing capacity of its adjacent structural layer in order to suppress the abnormal transmission of impact response between structural layers.

[0013] In some embodiments, generating damping design parameters for different structural layers based on their damping configurations includes the following steps: Based on the damping configuration results, determine the damping configuration focus or damping action mode of each structural layer under the corresponding impact mode. Based on the determined damping configuration focus or damping action mode, determine the corresponding damping design parameter range and / or parameter combination for different structural layers respectively; The range and / or combination of damping design parameters are associated with the corresponding structural layer and impact mode, and used as the dynamic design parameters of the structural layer under the impact mode.

[0014] In some embodiments, the present invention also provides a layered runway dynamic design system under aircraft impact load, including a processor and a memory, wherein the memory stores a computer program, and when the computer program is read by the processor, it executes the layered runway dynamic design method under aircraft impact load proposed in any of the above embodiments.

[0015] The dynamic design method for layered runway foundations under aircraft impact loads provided by this invention has gains including at least: This invention distinguishes the impact modes of aircraft impact loads based on the impact response time series data of different structural layers, identifies the corresponding first-acting structural layer under different impact modes, and introduces a virtual damping agent to uniformly abstract and express the damping requirements of structural layers. This enables joint scheduling and collaborative design of damping configurations of different structural layers, so that damping design parameters no longer depend on empirical assumptions or independent configuration of a single layer, but are generated under the driving force of impact mode and the dynamic coupling constraints between layers, thereby improving the rationality of dynamic design of layered runway structures under aircraft impact loads. Attached Figure Description

[0016] From the following description of embodiments in conjunction with the accompanying drawings, aspects, features, and advantages of the present invention will become clearer and more readily understood, in which: Figure 1 A flowchart illustrating the dynamic design method for layered runway foundations under aircraft impact loads, provided as an embodiment of the present invention. Figure 2 A schematic diagram of a layered runway subgrade structure provided for an embodiment of the present invention; Figure 3 This is a schematic diagram of the structure of a layered runway dynamic design system under aircraft impact load, provided as an embodiment of the present invention. Detailed Implementation

[0017] To facilitate understanding of the present invention by those skilled in the art, several embodiments are now described in detail with reference to the accompanying drawings. It should be understood that the embodiments are for illustrative purposes only and not for limiting the scope of protection of the present invention; the scope of protection of the present invention is defined by the claims, and includes equivalent schemes and equivalent transformations of the claims.

[0018] As mentioned above, existing airport runway subgrade dynamic design methods are difficult to accurately reflect the complex dynamic response characteristics of aircraft impact loads in layered subgrade structures, and lack the ability to perform differentiated design for different structural layers. This invention provides a layered subgrade dynamic design method under aircraft impact loads, aiming to configure the dynamic design parameters of the layered subgrade based on the characteristics of aircraft impact loads, so as to reduce the dynamic response of the subgrade structure under impact and improve the stability and service performance of the airport runway subgrade structure.

[0019] In one embodiment provided by the present invention, please refer to Figure 1 , Figure 1 A flowchart of a dynamic design method for layered runway foundations under aircraft impact loads, provided as an embodiment of the present invention.

[0020] In this embodiment, the airport runway is as follows: Figure 2As shown, it includes a surface layer 1, a base layer 2, and a runway foundation 3 arranged in sequence. The various structural layers together constitute a layered runway foundation structure. Under conditions such as aircraft landing, taxiing, or braking, different structural layers bear the impact load from the aircraft.

[0021] Under the aforementioned layered runway structure, the dynamic design method for layered runway under aircraft impact loads provided by this invention specifically includes, as follows: Figure 1 The steps shown are as follows: S01. Obtain impact response data, wherein the impact response data is the time series data of dynamic response generated in different structural layers under the action of aircraft impact load.

[0022] In this embodiment, step S01 aims to obtain relevant information that reflects the dynamic impact of aircraft impact loads on different structural layers of the airport runway.

[0023] In some embodiments, step S01 acquires dynamic response data of different structural layers in the airport runway under aircraft impact loads; further, the dynamic response data can be collected by sensors deployed at different structural layers; wherein, the sensors may include accelerometers, strain gauges, displacement sensors or other vibration response detection devices.

[0024] In other embodiments, step S01 obtains dynamic response data based on the simulated relationship between different structural layers and aircraft impact loads; further, it is obtained through simulation using a dynamic finite element model established based on aircraft type parameters (such as wheel weight, landing gear arrangement, landing speed), impact load characteristics (such as load time history or spectrum), and airport runway structural parameters (such as layer thickness, elastic modulus, density, Poisson's ratio, etc.).

[0025] It should be noted that the method of obtaining dynamic response data is not limited to the above example. It can be obtained from real-time / historical measured data or from calculation / simulation results. As long as the information obtained can reflect the dynamic response characteristics of the aircraft impact load acting on the airport runway structure, it can be used as the dynamic characterization information of step S01.

[0026] Specifically, the dynamic response data obtained in step S01 includes, but is not limited to, one or more of the following: acceleration response data, strain response data, and displacement response data.

[0027] Furthermore, in order to achieve structural positioning of the data source, for each dynamic response data, step S01 also includes the following step: binding the layer label of the dynamic response data.

[0028] Furthermore, in order to aggregate the continuous dynamic response feature expressions under different structural layers, for dynamic response data with different layer labels, step S01 also includes the following steps: summarizing dynamic response data with different layer labels and different types to generate a dynamic response data set.

[0029] S02. Based on the distribution characteristics of the impact response data, the aircraft impact load action mode is divided into several impact modes.

[0030] In this embodiment, the impact mode refers to the distinguishable response type exhibited by the impact response data generated by the layered runway subgrade structure under different aircraft impact loads in terms of temporal evolution and interlayer distribution.

[0031] Furthermore, different impact modes correspond to different load action processes or action forms, which are reflected in the overall distribution characteristics of impact response data in the time dimension and structural layer dimension.

[0032] Furthermore, step S01, which involves classifying the aircraft impact load action mode into several impact modes based on the distribution characteristics of the impact response data, includes the following steps: S021. Based on the differences in the distribution of impact response data in the time dimension and structural layer dimension, obtain the response characteristics of different aircraft impact loads in different structural layers.

[0033] Specifically, response characteristics are used to characterize the manifestation of the shock response during its temporal evolution and interlayer distribution. In some embodiments, the response characteristics include, but are not limited to, one or more of the following: response intensity, duration characteristics, and energy concentration.

[0034] For example, under some aircraft landing conditions, the impact response data shows a rapid rise and a significant peak in a short period of time, followed by a rapid decay in the time dimension; in the structural layer dimension, the response amplitude of different structural layers changes synchronously or approximately synchronously with time.

[0035] For example, under the conditions of aircraft taxiing or multiple wheel sets continuously contacting the runway, the impact response data in the time dimension is manifested as multiple peaks or multiple energy concentration intervals, and there is a certain time interval between the peaks; in the structural layer dimension, the response intensity or energy distribution of different structural layers shows a repeated distribution characteristic within multiple peak intervals.

[0036] For example, during aircraft braking or under complex operating conditions, the impact response data may exhibit a sustained vibration phase after the peak value. This phase is relatively long and decays slowly. The response characteristics of different structural layers during this sustained phase show a relatively stable or slowly changing distribution trend.

[0037] Using the above method, features can be extracted from the impact response data from both the time and structural layer dimensions, thereby obtaining the response characteristics of different aircraft impact loads in different structural layers.

[0038] S022. Based on the impact load action mode that exhibits different response characteristics in different structural layers, different impact modes are determined respectively.

[0039] In this embodiment, if multiple sets of impact response data have high similarity in response characteristics in both the time dimension and the structural layer dimension, the corresponding impact load action mode can be determined as the same impact mode; if different impact response data have significant differences in at least one of the response characteristics such as response intensity, duration characteristics or energy concentration, and / or the differences are reflected in the distribution pattern of different structural layers, the corresponding impact load action mode can be determined as different impact modes.

[0040] It should be noted that the classification of shock modes does not rely on specific mathematical models, numerical thresholds or fixed signal processing algorithms, but is determined based on the distinguishability of the shock response data in terms of temporal evolution and structural layer distribution.

[0041] S03. Based on the difference in impact response generated by each impact mode in different structural layers, obtain the first acting structural layer for each impact mode.

[0042] In this embodiment, based on the differences in the effects of each impact mode on different structural layers of the layered roadbed, the structural layer that has the most significant impact on the roadbed structure is determined, and this structural layer is designated as the first acting structural layer. This provides a basis for subsequently constructing a virtual damping agent based on the impact mode and structural layer, and for executing the damping configuration scheduling of different structural layers.

[0043] It is understood that the first functional structural layer described in this invention is not a pre-set fixed structural layer, but rather a result dynamically determined by comparing and analyzing the impact response characteristics of different structural layers for each impact mode.

[0044] In some embodiments, the dynamic response time series data corresponding to each structural layer is an acceleration time series; in these embodiments, the first acting structural layer for any impact mode is determined by the following steps: S031. Based on the impact response data of different structural layers under this impact mode, obtain the impact response characteristics of different structural layers under this impact mode.

[0045] Specifically, the acceleration time series corresponding to different structural layers under this impact mode are obtained respectively, and the impact response characteristics of different structural layers under this impact mode are extracted based on the acceleration time series. The impact response characteristics include, but are not limited to, one or more of the following: response intensity, duration characteristics, and energy concentration.

[0046] Among them, response intensity is used to characterize the vibration amplitude level in the acceleration time series, duration characteristic is used to characterize the time characteristics of the vibration response duration, and energy concentration is used to characterize the energy distribution state of the acceleration response within a specific time interval.

[0047] For example, under a specific impact mode, the acceleration time series corresponding to one structural layer may show a large acceleration peak in a short period of time; in another structural layer, the acceleration peak may be relatively small, but the vibration response duration is long; in yet another structural layer, the acceleration time series may show a high degree of energy concentration during the impact process.

[0048] S032. Based on the differences in the impact response characteristics between the different structural layers, the structural layer that exhibits the most significant impact response under this impact mode is determined as the first acting structural layer under this impact mode.

[0049] Further, step S032 compares and analyzes the impact response characteristics of different structural layers under the same impact mode: When a structural layer exhibits relatively prominent impact response characteristics relative to other structural layers in at least one or more of the following aspects: response intensity, duration, or energy concentration, under this impact mode, the structural layer is identified as the first acting structural layer in this impact mode.

[0050] For example, in one impact mode, if the peak acceleration in the acceleration time series corresponding to the surface layer is significantly higher than that of the base layer and the roadbed, the surface layer can be identified as the first acting structural layer of this impact mode; in another impact mode, if the vibration duration in the acceleration time series corresponding to the base layer is significantly longer than that of other structural layers, the base layer can be identified as the first acting structural layer of this impact mode; in yet another impact mode, if the acceleration time series corresponding to the roadbed exhibits a high degree of energy concentration during the impact, the roadbed can be identified as the first acting structural layer of this impact mode.

[0051] It should be noted that the above content only uses the acceleration time sequence as an example to illustrate the process of determining the first action structure layer; in other embodiments, the first action structure layer can also be determined based on response data such as strain and displacement or their combinations, using the same comparison logic.

[0052] S04. Based on each impact mode and its corresponding first action structure layer, construct virtual damping agents for different structure layers respectively. Any of the virtual damping agents is used to characterize the damping demand characteristics of one or a group of impact modes of a structure layer.

[0053] In this embodiment, the virtual damping agent refers to a design agent used to characterize the damping demand characteristics of a structural layer in a layered roadbed under one or a set of impact modes.

[0054] Furthermore, the virtual damping agent is a design-level abstract representation unit used to establish an intermediate mapping relationship between impact mode analysis results and damping configuration results. The virtual damping agent does not directly participate in the structural design or material selection of specific damping components, but rather serves to uniformly express the damping requirements of different structural layers under different impact modes during the design phase, thereby reducing the complexity of damping design across different impact conditions.

[0055] It should be noted that the virtual damping agent does not correspond to a specific damping material, damping component, or defined damping numerical parameter. Instead, it is an intermediate characterization unit used to connect the impact response characteristics and damping design parameters. It is used to abstractly describe the structural layer's requirements for vibration suppression, energy dissipation, or impact mitigation under specific impact conditions.

[0056] It should be further clarified that the demand status does not need to be represented in a definite numerical form; it can be a representation of relative demand level, demand type, or demand focus. In this way, the damping demand of different structural layers under different impact modes can be described in a comparable and scalable form, without relying on a single damping evaluation index or a fixed damping calculation model.

[0057] This invention avoids the coupling problem caused by directly determining specific damping parameters based on impact response data by introducing a virtual damping agent, enabling the damping requirements under different impact modes and different structural layers to be expressed and compared in a unified form.

[0058] Furthermore, in step S04, where virtual damping proxies for different structural layers are constructed based on each impact mode and its corresponding first action structural layer, the virtual damping proxy for any structural layer is generated through the following process: S041. Based on one or more impact modes corresponding to the structural layer as the first functional structural layer, obtain the impact response characteristics of the structural layer under the one or more impact modes.

[0059] In this embodiment, the impact response characteristics obtained in step S041 can be derived from the impact response data of the structural layer under the corresponding impact mode, and are used to reflect the dynamic response performance of the structural layer under the impact mode. The impact response characteristics may include one or more of response intensity, duration characteristics, or energy concentration, and their specific forms can be selected according to the type of impact response data and the purpose of analysis.

[0060] S042. Based on the impact response characteristics under one or more impact modes, determine the damping demand characterization information.

[0061] Specifically, the damping demand characterization information is used to reflect the damping demand of the structural layer for vibration suppression, energy dissipation, or impact mitigation under one or more impact modes.

[0062] In some embodiments, the damping demand characterization information is determined based on the relative differences between different impact response characteristics, and is used to reflect the main focus of the damping demand of the structural layer under the corresponding impact mode.

[0063] For example, when the impact response characteristics are characterized by a large response intensity, the damping demand information can focus on reflecting the demand for impact mitigation or peak suppression; when the impact response characteristics are characterized by a long vibration duration or significant energy concentration, the damping demand information can focus on reflecting the demand for energy dissipation or continuous vibration suppression.

[0064] It should be noted that the above examples are only used to illustrate how to understand the information representing damping demand, and do not constitute a limitation on how to determine it.

[0065] S043. Associate the damping demand characterization information with the structural layer and its corresponding one or more impact modes to generate a corresponding virtual damping agent.

[0066] Through the above association process, the generated virtual damping proxy can simultaneously reflect the structural layer attributes, impact mode characteristics, and damping demand state, so that the damping demand of different structural layers under different impact modes can be expressed in a unified proxy form.

[0067] S05. Based on the virtual damping agents of the different structural layers, jointly schedule the damping configuration of the different structural layers.

[0068] In this embodiment, step S05 is used to jointly schedule the damping configuration of different structural layers based on the virtual damping agents of different structural layers that have been constructed in step S04, so as to achieve overall dynamic response coordination of the layered roadbed structure under the same impact mode.

[0069] It should be noted that the joint scheduling of damping configurations of different structural layers described in step S05 is a design-stage scheduling method based on existing shock response data, shock mode analysis results, and damping demand characterization information. Its purpose is to reasonably constrain and select the damping configuration relationship of different structural layers before the damping design parameters are determined.

[0070] Specifically, the virtual damping agents of different structural layers respectively characterize the damping demand characteristics of the structural layer under one or a set of impact modes; by jointly analyzing the virtual damping agents, the damping demand relationship between different structural layers under the same impact mode is identified, thereby avoiding the problem of interlayer dynamic response imbalance caused by damping configuration being determined independently based on a single structural layer.

[0071] Furthermore, step S05, which involves jointly scheduling the damping configurations of different structural layers based on the virtual damping agents of the different structural layers, specifically includes the following steps: S051. Based on the virtual damping agents corresponding to different structural layers, obtain the damping demand characterization information of each structural layer under the corresponding impact mode.

[0072] S052. Based on the damping demand characterization information, identify one or more structural layers that require damping configuration under the same impact mode.

[0073] S053. Under the premise of ensuring the overall dynamic response coordination of the same impact mode, the damping configuration of one or more identified structural layers shall be coordinated and allocated.

[0074] In this embodiment, the overall dynamic response coordination under the same impact mode means that when damping is configured for multiple structural layers under the same impact mode, the improvement of the dynamic response of each structural layer should maintain a reasonable match between the layers, so as to avoid imbalances such as a significant decrease in the response of a certain structural layer while the response of adjacent structural layers increases significantly, or an abnormal concentration of impact energy at the interlayer interface.

[0075] For example, in landing impact mode, if damping the upper structure leads to a significant increase in the dynamic response of the lower structure, then the damping configuration does not meet the premise of overall dynamic response coordination.

[0076] Furthermore, overall dynamic response coordination is manifested in at least one of the following situations: the response change trends of different structural layers under this impact mode are consistent; the inter-layer response differences do not show abnormal expansion; and the impact response does not produce abnormal amplification or concentration in adjacent structural layers.

[0077] The above-mentioned coordination determination method can be realized based on comparative analysis of measured impact response data, or it can be evaluated in combination with dynamic analysis models or engineering experience. This invention does not limit this method.

[0078] It should be further explained that the above-mentioned overall dynamic response coordination is not obtained by verifying the actual response effect after the implementation of the damping configuration, but rather by making predictions and constraints during the damping configuration scheduling and coordinated allocation process based on existing impact response data, impact mode analysis results, and damping demand characterization information, thereby proactively avoiding damping configuration schemes that may cause inter-layer dynamic response imbalance.

[0079] Furthermore, under the premise of coordinated overall dynamic response under the same impact mode, the coordinated allocation of damping configurations for one or more structural layers specifically includes the following steps: The damping configuration of any structural layer is constrained to not exceed the dynamic response bearing capacity of its adjacent structural layer in order to suppress the abnormal transmission of impact response between structural layers.

[0080] The dynamic response bearing capacity of the adjacent structural layers is used to characterize the dynamic response level that the adjacent structural layers can withstand under the corresponding impact mode. It can be determined by statistical analysis of historical measured data, evaluation by dynamic analysis models, or engineering experience.

[0081] This embodiment introduces constraints on the dynamic response bearing capacity of adjacent structural layers during the damping configuration scheduling stage, so that the damping configuration is no longer determined in isolation, but is coordinated and restricted under the dynamic coupling relationship between layers, thereby reducing the risk of abnormal transmission of impact response between structural layers.

[0082] S054. Based on the collaborative allocation results, generate damping configuration results for different structural layers.

[0083] In this embodiment, the damping configuration result is used to characterize the damping configuration relationship and configuration focus of different structural layers under the corresponding impact mode. It serves as the design basis for generating specific damping design parameters in the future, but is not directly equivalent to the final damping numerical parameters.

[0084] S06. Based on the damping configuration of the different structural layers, generate the damping design parameters for the different structural layers.

[0085] In this embodiment, step S06 further transforms the damping configuration result into damping design parameters for engineering implementation based on the collaborative allocation result.

[0086] Furthermore, the step of generating damping design parameters for different structural layers based on their damping configurations includes the following steps: S061. Based on the damping configuration results, determine the damping configuration focus or damping action mode of each structural layer under the corresponding impact mode.

[0087] In this embodiment, the damping configuration focus or damping action mode is used to characterize the type of damping action that the structural layer mainly undertakes in this impact mode, such as focusing on impact peak reduction, energy dissipation, and continuous vibration suppression, without limiting the specific damping material form or structural form.

[0088] For example, in the landing impact mode, if the damping configuration results indicate that the surface layer mainly undertakes the impact mitigation function, the base layer mainly undertakes the energy dissipation function, and the roadbed mainly undertakes the vibration suppression function, then in step S061, the damping configuration focus of the surface layer, base layer, and roadbed in this impact mode is determined respectively.

[0089] S062. Based on the determined damping configuration focus or damping action mode, determine the corresponding damping design parameter range and / or parameter combination for different structural layers.

[0090] In this embodiment, the range of damping design parameters and / or the combination of parameters are used to limit the range of damping parameter values ​​or parameter configuration relationships that can be used for the structural layer under the corresponding impact mode.

[0091] The damping design parameters may include one or more of the following: damping strength-related parameters, damping range-related parameters, and damping configuration ratio parameters. The specific form of these parameters can be selected according to the engineering application requirements. It should be noted that the parameter range and / or parameter combinations are only used to define the design space and do not directly constitute the final implementation parameters.

[0092] For example, for structural layers that emphasize impact mitigation, the parameter range of medium to high damping strength can be determined; for structural layers that emphasize energy dissipation, a combination of energy-dissipating parameters with multi-parameter synergy can be determined; and for structural layers that emphasize vibration suppression, the parameter range of low to medium damping strength can be determined.

[0093] S063. The range and / or combination of damping design parameters are associated with the corresponding structural layer and impact mode, and used as the dynamic design parameters of the structural layer under the impact mode.

[0094] In this embodiment, the range and / or combination of damping design parameters are bound to a specific structural layer and its corresponding impact mode, thereby forming structural layer damping design parameters for different impact modes, thus avoiding the dynamic design mismatch problem caused by using uniform damping parameters.

[0095] For example, in the landing impact mode, the impact relief damping parameter range corresponding to the surface layer, the energy dissipation damping parameter combination corresponding to the base layer, and the vibration suppression damping parameter range corresponding to the roadbed are respectively associated with the corresponding structural layer and the impact mode, and used as the damping design parameter set of the layered roadbed structure in the impact mode.

[0096] In one embodiment, the present invention also provides a layered runway dynamic design system under aircraft impact loads, for performing the layered runway dynamic design method under aircraft impact loads proposed in any of the above embodiments.

[0097] like Figure 3 As shown, the layered runway dynamic design system under aircraft impact load provided in this embodiment includes an input device, a processor, a memory, and an output device, wherein the processor is communicatively connected to the input device, the memory, and the output device.

[0098] In this embodiment, the input device is used to acquire impact response data of the layered runway foundation structure under aircraft impact load. The impact response data includes dynamic response time-series data collected or obtained at different structural layers. The input device can also be used to receive operating condition information or structural layer parameter information related to aircraft impact load.

[0099] Furthermore, the present invention does not limit the specific form of the input device, which may include a sensor interface, a data acquisition module, an external data import interface, or a network communication interface, etc.

[0100] In this embodiment, the memory is used to store computer programs and data required during the execution of the layered runway dynamic design method under aircraft impact loads, and includes volatile memory and / or non-volatile memory.

[0101] In this embodiment, the processor is used to call and execute the computer program stored in the memory to implement the steps of the layered runway dynamic design method under aircraft impact loads described above. Specifically, the processor is configured to: distinguish different impact modes based on input impact response data; determine the corresponding first-acting structural layer based on the impact response differences of structural layers under different impact modes; construct virtual damping proxies for different structural layers based on the impact modes and the first-acting structural layers; jointly schedule and coordinate the damping configuration of different structural layers according to the virtual damping proxies of different structural layers; and generate damping design parameters for different structural layers under the corresponding impact modes based on the damping configuration results.

[0102] In this embodiment, the output device is used to output the dynamic design results of the layered runway foundation under aircraft impact load. The design results include at least the damping configuration results and / or damping design parameters of different structural layers.

[0103] Furthermore, the output device may include a display terminal, a graphical interface, a data export interface, or a communication interface, etc., and the present invention does not limit it.

[0104] Through the above system structure configuration, the present invention can transform the impact response data under aircraft impact load into damping design parameters for layered runway structures, realize the scheduling and parameter generation of the design stage for damping configuration of different structural layers, and thus provide systematic technical support for the dynamic design of layered runway structures such as airport runways under aircraft impact load conditions.

[0105] In the above embodiments, the descriptions of different embodiments have different emphases; technical features not detailed or recorded in a certain embodiment can be understood and implemented by referring to the corresponding records of other embodiments. Unless otherwise expressly stated to the contrary: technical features in each embodiment can be substituted or combined with each other without technical conflict; the order of method steps can be adjusted without affecting the function; the device / module / unit can be implemented by hardware, software or a combination thereof, and can be centralized or distributed; parameters, values ​​or ranges include reasonable errors and equivalent values, and the terms "about", "greater than / less than", "between", and range endpoints are all covered without affecting the technical effect; ordinal numbers such as "first / second" are only used for distinction and do not limit the quantity, priority or structural relationship; the reference numerals and names in the specification and drawings are only illustrative and do not limit the structural form, size ratio or installation position; improvements, substitutions or equivalent solutions that are not explicitly stated but can be obtained by those skilled in the art without creative effort should all be included in the protection scope of this invention.

Claims

1. A method for dynamic design of layered runway foundations under aircraft impact loads, characterized in that, Includes the following steps: Acquire impact response data, which is the time series data of dynamic response generated in different structural layers under aircraft impact load; Based on the distribution characteristics of the impact response data, the aircraft impact load action mode is divided into several impact modes; Based on the differences in impact response generated by each impact mode in different structural layers, the first acting structural layer of each impact mode is obtained; Based on each impact mode and its corresponding first action structural layer, virtual damping agents for different structural layers are constructed respectively. Any of the virtual damping agents is used to characterize the damping demand characteristics of a structural layer in one or a set of impact modes. Based on the virtual damping agents of the different structural layers, the damping configurations of the different structural layers are jointly scheduled. Based on the damping configuration of the different structural layers, damping design parameters for the different structural layers are generated.

2. The method for dynamic design of layered runway foundations under aircraft impact loads according to claim 1, characterized in that, The step of classifying the aircraft impact load action mode into several impact modes based on the distribution characteristics of the impact response data includes the following steps: Based on the differences in the distribution of impact response data in the time dimension and structural layer dimension, the impact response characteristics of different aircraft impact loads in different structural layers are obtained. Based on the impact load action mode that exhibits different impact response characteristics in different structural layers, different impact modes are determined.

3. The method for dynamic design of layered runway foundations under aircraft impact loads according to claim 2, characterized in that, The impact response characteristics include response intensity, duration, or energy concentration.

4. The method for dynamic design of layered runway foundations under aircraft impact loads according to claim 1, characterized in that, The first action structural layer for any impact mode is determined through the following steps: Based on the impact response data of different structural layers under this impact mode, the impact response characteristics of different structural layers under this impact mode are obtained. Based on the differences in the impact response characteristics of the different structural layers, the structural layer that exhibits the most significant impact response under this impact mode is determined as the first acting structural layer of this impact mode.

5. The method for dynamic design of layered runway foundations under aircraft impact loads according to claim 4, characterized in that, The structural layer with the most significant impact response is the structural layer that exhibits relatively prominent performance in at least one or more of the impact response characteristics of different structural layers, such as response intensity, duration characteristics, or energy concentration.

6. The method for dynamic design of layered runway foundations under aircraft impact loads according to claim 1, characterized in that, In the process of constructing virtual damping proxies for different structural layers based on each impact mode and its corresponding first action structural layer, the virtual damping proxy for any structural layer is generated through the following steps: Based on one or more impact modes corresponding to the structural layer as the first functional structural layer, the impact response characteristics of the structural layer under the one or more impact modes are obtained. Based on the impact response characteristics under one or more impact modes, damping demand characterization information is determined. The damping demand characterization information is used to reflect the damping demand of the structural layer for vibration suppression, energy dissipation or impact mitigation under one or more impact modes. The damping demand characterization information is associated with the structural layer and its corresponding one or more impact modes to generate a corresponding virtual damping agent.

7. The method for dynamic design of layered runway foundations under aircraft impact loads according to claim 1, characterized in that, The step of jointly scheduling the damping configurations of different structural layers based on the virtual damping agents of different structural layers includes the following steps: Based on the virtual damping agents corresponding to different structural layers, the damping demand characterization information of each structural layer under the corresponding impact mode is obtained respectively. Based on the damping demand characterization information, identify one or more structural layers that require damping configuration under the same impact mode; Under the premise of ensuring overall dynamic response coordination under the same impact mode, the damping configuration of one or more identified structural layers is coordinated and allocated. Based on the collaborative allocation results, damping configuration results for different structural layers are generated.

8. The method for dynamic design of layered runway foundations under aircraft impact loads according to claim 7, characterized in that, The coordinated allocation of damping configurations for one or more identified structural layers includes the following steps: During the coordinated distribution process, the damping configuration of any structural layer is constrained to not exceed the dynamic response bearing capacity of its adjacent structural layer in order to suppress the abnormal transmission of impact response between structural layers.

9. The method for dynamic design of layered runway foundations under aircraft impact loads according to claim 1, characterized in that, The process of generating damping design parameters for different structural layers based on their damping configurations includes the following steps: Based on the damping configuration results, determine the damping configuration focus or damping action mode of each structural layer under the corresponding impact mode. Based on the determined damping configuration focus or damping action mode, determine the corresponding damping design parameter range and / or parameter combination for different structural layers respectively; The range and / or combination of damping design parameters are associated with the corresponding structural layer and impact mode, and used as the dynamic design parameters of the structural layer under the impact mode.

10. A dynamic design system for layered runway foundations under aircraft impact loads, characterized in that, It includes a processor and a memory, wherein the memory stores a computer program, and when the computer program is read by the processor, it executes the layered runway dynamic design method under aircraft impact load as described in any one of claims 1 to 9.

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