Quantitative analysis method for full nonlinearity and additional nonlinearity of sea site under action of dynamic load

Abstract

The invention provides a quantitative analysis method for full nonlinearity and additional nonlinearity of a sea area site under the action of a dynamic load, which comprises the following steps of: establishing a sea area site model (without a structure), a direct coupling method model and a step-by-step coupling method model, and comparing and analyzing differential results of dynamic responses of the three models in a time domain; finally, a set of method which is suitable for the ocean dynamic load environment and can be used for quantitatively analyzing the full nonlinearity and additional nonlinearity of the site is formed, and the method can be used for accurately and quantitatively analyzing the influence of the non-linearity of the sea site on the dynamic response, so that the necessity or replaceability of the integral coupling analysis of the soil and the structure is determined; the invention further provides a step-by-step coupling method, a new choice is provided for geotechnical design of ocean engineering, the design efficiency is greatly improved, the calculation cost is reduced, and the method is extremely high in engineering design applicability.

Description

Technical Field

[0001] The present invention relates to the field of marine geotechnical engineering technology, and in particular to a quantitative analysis method of full nonlinearity and additional nonlinearity of a marine site under dynamic load. Background Art

[0002] The marine environment is complex and there are many dynamic loads, including strong winds, waves, currents, earthquakes, etc., which is undoubtedly a huge challenge for the design and construction of offshore projects such as offshore wind power structures, support structures and offshore platforms. In the design and construction of marine projects, it is inevitable to encounter a deep overburden. Unlike rocky sea sites, the dynamic response of soil sea sites is significantly more complex. In addition, the interaction between soil and structure often directly affects the dynamic response characteristics of the marine engineering structure itself and the soil around the structure, which has a huge impact on the structure and site and cannot be ignored.

[0003] The interaction analysis between soil and structure is generally divided into substructure method and direct method. The substructure method is to divide the site and structure into different subsystems, usually solved in the frequency domain, with high efficiency, but using equivalent linearization method to simulate the nonlinear characteristics of soil, it will significantly underestimate the dynamic response of the structure when dynamic loads act, and it can only be applied to horizontal layered sites. The direct method is also called the overall method, which analyzes the structure-site system as a whole, and generally performs numerical analysis in the time domain. This method can not only consider the strong nonlinearity of soil through the dynamic constitutive model of soil, but also is suitable for complex heterogeneous soil sites.

[0004] However, for marine engineering with various working conditions, the substructure method has certain limitations, while the modeling and calculation costs of the direct method are too high, which makes it less applicable and less economical for marine engineering. At present, most research and technologies only support qualitative analysis of the interaction effect between soil and structure and site nonlinearity, which has certain limitations. Summary of the invention

[0005] The present invention aims at the defects and shortcomings of the prior art. The purpose of the present invention is to provide a quantitative analysis method for the full nonlinearity and additional nonlinearity of the sea site under dynamic loads. By establishing a sea site model (without structure), a direct coupling method model and a step-by-step coupling method model, the differential results of the dynamic responses of the three models in the time domain are compared and analyzed, and finally a set of methods suitable for the marine dynamic load environment that can quantitatively analyze the full nonlinearity and additional nonlinearity of the site is formed. This method can accurately quantify and analyze the influence of the nonlinearity of the sea site on the dynamic response, thereby clarifying the necessity or substitutability of the overall coupling analysis of soil and structure. In addition, the present invention also proposes a step-by-step coupling method, which provides a new choice for the geotechnical design of marine engineering, greatly improves the design efficiency and reduces the calculation cost, and is highly applicable to engineering design.

[0006] The specific technical solutions are as follows: A quantitative analysis method for full nonlinearity and additional nonlinearity of marine sites under dynamic loads: By establishing a superstructure model, the numerical simulation of the superstructure is realized; on this basis, the structural dynamic response under ideal rigid foundation conditions without considering the nonlinear influence of the sea area site is calculated; The soil of the marine site is described by the elastoplastic dynamic constitutive method, and the fully coupled superstructure-foundation-soil system is directly constructed to realize the numerical simulation based on the direct coupling method; on this basis, the structural dynamic response considering the full nonlinear effect of the marine site is calculated; Calculate the dynamic response of the unstructured marine site model, calibrate the equivalent linearized soil parameters based on the maximum shear strain level of each soil layer; then use the calibration value to define the soil, construct the upper structure-foundation-foundation overall system, and realize numerical simulation based on the step-by-step coupling method; on this basis, calculate the dynamic response of the structure considering the original nonlinear effect of the marine site; By comparing and analyzing the structural dynamic response results of the superstructure model and the direct coupling method model, the full nonlinear impact of the sea site is quantitatively analyzed; By comparing and analyzing the structural dynamic response results of the direct coupling method model and the step-by-step coupling method model, the influence of additional nonlinearity of the sea area site is quantitatively analyzed.

[0007] Among them, dynamic load refers to multiple dynamic loads or combined loads such as earthquakes, waves, and ocean currents. The full nonlinearity of the sea area site includes the original nonlinearity of the sea area site and the additional nonlinearity of the sea area site. The original nonlinearity of the sea area site refers to the nonlinearity of the stress-strain relationship exhibited by the soil in the sea area site after being subjected to dynamic loads under the conditions of the sea area site (without structure); the additional nonlinearity of the sea area site refers to the additional nonlinearity of the soil material in the sea area site further exhibited due to the interaction effect between the soil and structure (Soil-Structure Interaction, SSI) of the sea area site under the action of dynamic loads in the actual marine environment due to the existence of structures above the seabed surface and foundations in the seabed.

[0008] Furthermore, the superstructure includes structures and components above the seabed and foundation. The numerical simulation is based on the finite element analysis method to establish a model. The material of the superstructure adopts linear elastic constitutive simulation, and a fixed boundary is applied at the bottom of the superstructure to simulate ideal rigid foundation conditions.

[0009] Furthermore, when implementing the numerical simulation based on the direct coupling method, a fully coupled system model of the superstructure-foundation-flexible foundation considering the SSI effect is constructed, and the dynamic nonlinearity and complex characteristics of the soil material of the marine site are described by the elastoplastic constitutive method.

[0010] Furthermore, in the process of realizing the numerical simulation based on the step-by-step coupling method, firstly, a site model is established only for the sea site that does not include the superstructure and the foundation, the elastoplastic constitutive model is used to describe the dynamic nonlinearity and complex characteristics of the soil, the dynamic load is applied, the maximum shear strain level of each soil layer is calculated, and 0.65 times the maximum shear strain level is taken as the equivalent shear strain, and the corresponding values ​​are calibrated on the stiffness parameter and damping parameter curves; then, the calibrated equivalent stiffness parameters and equivalent damping parameters compatible with the soil unit strain are used as input parameters of the viscoelastic soil body to construct the superstructure-foundation-foundation overall system.

[0011] Furthermore, when calculating the structural dynamic response under ideal rigid foundation conditions without considering the nonlinear effects of the sea area site, a dynamic time-history load is applied to the upper structure model, and the dynamic response of the upper structure without considering the nonlinear effects of the sea area site is calculated in the time domain.

[0012] Furthermore, when calculating the structural dynamic response considering the full nonlinear effects of the sea area site, a dynamic time-history load is applied to the direct coupling method model, and the dynamic response of the superstructure considering the full nonlinear effects of the sea area site is calculated in the time domain.

[0013] By comparing the dynamic response of the upper structure without considering the nonlinearity of the sea area site and the direct coupling method, the dynamic response of the upper structure in the SSI system considering the full nonlinearity of the sea area site can be obtained. The difference between the two can be considered to be caused by the full nonlinear effect of the sea area site, that is, the influence of the full nonlinear effect of the sea area site can be quantified.

[0014] Furthermore, when calculating the dynamic response of the structure considering the influence of the native nonlinear effects of the sea area site, the dynamic time-history load is applied from the step-by-step coupling method model, and the dynamic response of the superstructure considering the influence of the native nonlinear effects of the sea area site is calculated in the time domain.

[0015] Comparative analysis shows that the direct coupling method can obtain the structural dynamic response of the upper structure in the SSI system considering the full nonlinearity of the soil, and the step-by-step coupling method can obtain the structural dynamic response of the upper structure in the SSI system considering the native nonlinearity of the soil. The difference between the two is caused by the additional nonlinear effects of the sea area site, which means that the influence of the additional nonlinear effects of the sea area site can be quantified.

[0016] And, a quantitative analysis system of full nonlinearity and additional nonlinearity of marine sites under dynamic loads, including: The upper structure numerical simulation module is used to achieve the upper structure numerical simulation by establishing the upper structure model; on this basis, the structural dynamic response without considering the nonlinear influence of the sea area site under the ideal rigid foundation condition is calculated; The numerical simulation module based on the direct coupling method is used to describe the soil of the marine site with the elastoplastic dynamic constitutive model, directly construct a fully coupled superstructure-foundation-foundation overall system, and realize numerical simulation based on the direct coupling method; on this basis, the structural dynamic response considering the full nonlinear effect of the marine site is calculated; The numerical simulation module based on the step-by-step coupling method is used to calculate the dynamic response of the unstructured marine site model. Based on the maximum shear strain level of each soil layer, the equivalent linearized soil parameters are calibrated. The calibrated values ​​are then used to define the soil, and the upper structure-foundation-foundation overall system is constructed to achieve numerical simulation based on the step-by-step coupling method. On this basis, the calculation considers the impact of the original nonlinear effect of the marine site on the structural dynamic response; Full nonlinear quantitative analysis module, which is used to quantitatively analyze the full nonlinear impact of the sea area site by comparing and analyzing the structural dynamic response results of the superstructure model and the direct coupling method model; The additional nonlinear quantitative analysis module is used to quantitatively analyze the impact of additional nonlinearity on the sea area site by comparing the structural dynamic response results of the direct coupling method model and the step-by-step coupling method model.

[0017] An electronic device comprises a memory, a processor and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, the steps of a quantitative analysis method for full nonlinearity and additional nonlinearity of a marine site under dynamic load as described above are implemented.

[0018] A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that when the computer program is executed by a processor, the steps of a quantitative analysis method for full nonlinearity and additional nonlinearity of a marine site under a dynamic load as described above are implemented.

[0019] The beneficial effects of the present invention and its preferred embodiments include at least: 1. This method is applicable to a variety of offshore engineering structures, foundation forms and sites; 2. This method proposes a modeling and calculation method for the distributed coupling model, which can achieve quantitative analysis of site additional nonlinearity through differential comparison with the dynamic response of the overall coupling model; 3. This method can realize the quantitative analysis of the full nonlinearity of the site by differentially comparing the dynamic responses of the superstructure model and the overall coupling model under ideal rigid foundation conditions; 4. Through the quantitative analysis results of this method, the specific effects of native nonlinearity, additional nonlinearity and total nonlinearity on the structural dynamic response can be obtained, thereby clarifying the necessity or substitutability of the overall coupling analysis of soil and structure. 5. Through the quantitative analysis and proportion analysis of various nonlinear effects by this method, a more preferred choice of efficient modeling method is provided for the geotechnical design of marine engineering, which greatly improves the design efficiency and reduces the calculation cost, which is of great significance for the simplification of engineering design schemes and processes and the improvement of accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments: Figure 1 The present invention is a flow chart of a method for quantitatively analyzing full nonlinearity and additional nonlinearity of a sea area site according to an embodiment of the present invention.

[0021] Figure 2 Schematic diagram of the wind turbine-tower-suction pile jacket foundation-site system and model of an offshore wind farm project.

[0022] Figure 3 The figure is a flow chart of the implementation method of the step-by-step coupling method according to an embodiment of the present invention. DETAILED DESCRIPTION

[0023] In order to make the features and advantages of this patent more obvious and easy to understand, the following embodiments are specifically described in detail with the accompanying drawings as follows: It should be noted that the following detailed descriptions are illustrative and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used in this specification have the same meanings as those commonly understood by those skilled in the art to which the present application belongs.

[0024] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0025] like Figure 1-Figure 3As shown, the embodiment of the present invention specifically introduces the design and construction of a quantitative analysis method for full nonlinearity and additional nonlinearity of a sea area site under dynamic loads, wherein dynamic loads refer to multiple dynamic loads or combined loads such as earthquakes, waves, and ocean currents. Full nonlinearity of a sea area site includes native nonlinearity of a sea area site and additional nonlinearity of a sea area site. Native nonlinearity of a sea area site refers to the nonlinearity of the stress-strain relationship exhibited by the soil body after being subjected to dynamic loads under the condition of a sea area site (without structure); additional nonlinearity of a sea area site refers to the additional nonlinearity further exhibited by the soil material due to the soil-structure interaction effect (SSI) of the sea area site under dynamic loads in an actual marine environment due to the existence of structures above the seabed surface and foundations in the seabed. The specific process is as follows: Figure 1 As shown, here, combined with a certain offshore wind farm project, the wind turbine, suction pile jacket foundation, site, etc. are introduced in detail (the specific structural system and model diagram can be found in Figure 2 ), the calculation analysis specifically includes the following steps: Step S1-1, numerical simulation of superstructure: superstructure refers to the structure and components above the seabed and foundation, and in this specific implementation case, it specifically refers to the wind turbine + tower + transition section + jacket structure system. The numerical simulation is based on the finite element analysis method to establish a model. In order to reduce the influence of other material nonlinearities on the nonlinear quantitative analysis of the sea area site, the material of the superstructure adopts linear elastic constitutive simulation. In addition, a fixed boundary is applied at the bottom of the superstructure to simulate the ideal rigid foundation condition; Step S1-2, numerical simulation based on direct coupling method: construct a fully coupled model of wind turbine-tower-suction pile jacket foundation-nonlinear site system considering SSI effect, so as to simulate the dynamic nonlinearity and hysteresis characteristics of the sea site soil by adopting the generalized non-Masing dynamic constitutive method, and directly construct a fully coupled wind turbine-tower-suction pile jacket foundation-site system model; Step S1-3, numerical simulation based on step-by-step coupling method: The specific steps are as follows Figure 3 As shown in the figure, the first step is to establish a site model only for the sea site (excluding superstructures and foundations), and adopt the generalized non-Masing dynamic constitutive method to describe the dynamic nonlinearity and complex characteristics of the soil. Dynamic loads are applied, the maximum shear strain level of each soil layer is calculated, and 0.65 times of it is taken as the equivalent shear strain, and its corresponding value is calibrated on the stiffness parameter and damping parameter curve; the second step is to use the equivalent stiffness parameters and equivalent damping parameters calibrated in the first step that are compatible with the soil unit strain as the input parameters of the viscoelastic soil body, and construct a fully coupled wind turbine-tower-suction pile jacket foundation-site system model; Step S2-1, calculating the dynamic response of the upper structure: calculating the structural dynamic response without considering the nonlinear effect of the sea area site under the ideal rigid foundation condition, constructing a wind turbine-tower-jacket system model, and applying corresponding dynamic loads; Step S2-2: Calculate the dynamic response of the upper structure by the direct coupling method: Apply dynamic time history loads to the direct coupling method model, and calculate the dynamic response of the upper structure in the time domain taking into account the full nonlinear effect of the sea area site; Step S2-3: Calculate the dynamic response of the superstructure using the step-by-step coupling method: Apply dynamic time-history loads from the step-by-step coupling method model and calculate the dynamic response of the superstructure in the time domain taking into account the influence of the native nonlinear effects of the marine site; Step S3-1, quantify the impact of the full nonlinearity of the sea area site: compare and analyze step S2-1 (dynamic response of the upper structure without considering the nonlinearity of the sea area site) and step S2-2 (direct coupling method can obtain the dynamic response of the upper structure in the SSI system considering the full nonlinearity of the sea area site). The difference between the two can be considered to be caused by the full nonlinear effect of the sea area site, that is, the impact of the full nonlinear effect of the sea area site can be quantified; Step S3-2, quantify the impact of additional nonlinearity of the sea area site: compare and analyze the structural dynamic response results of step S2-2 (the direct coupling method can obtain the dynamic response of the upper structure in the SSI system considering the full nonlinearity of the sea area site) and step S2-3 (the step-by-step coupling method can obtain the dynamic response of the upper structure in the SSI system considering the original nonlinearity of the sea area site). The difference between the two is caused by the additional nonlinear effect of the sea area site, which means that the impact of the additional nonlinear effect of the sea area site can be quantified; Therefore, the present invention establishes a quantitative analysis method for the full nonlinearity and additional nonlinearity of the sea area site under dynamic loads. By establishing a sea area site model (without structure), a direct coupling method model and a step-by-step coupling method model, the differentiated results of the dynamic responses of the three models in the time domain are compared and analyzed. The method for quantitatively analyzing the full nonlinearity and additional nonlinearity of marine soil under dynamic loads has the advantages of strong operability, high accuracy and high efficiency.

[0026] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present application may adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program codes.

[0027] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0028] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0029] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0030] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the present invention should be understood by people with ordinary skills in the field to which the present invention belongs. The words "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0031] The above is only a preferred embodiment of the present invention, and does not limit the present invention in other forms. Any technician familiar with the profession may use the above disclosed technical content to change or modify it into an equivalent embodiment with equivalent changes. However, any simple modification, equivalent change and modification made to the above embodiment according to the technical essence of the present invention without departing from the technical solution of the present invention still belongs to the protection scope of the technical solution of the present invention.

[0032] This patent is not limited to the above-mentioned best implementation mode. Anyone can derive other forms of quantitative analysis methods for full nonlinearity and additional nonlinearity of sea areas under dynamic loads under the inspiration of this patent. All equal changes and modifications made according to the scope of the patent application of this invention should be covered by this patent.

Claims

1. A quantitative analysis method for full nonlinearity and additional nonlinearity of marine sites under dynamic loads, characterized by: By establishing a superstructure model, the numerical simulation of the superstructure is realized; on this basis, the structural dynamic response under ideal rigid foundation conditions without considering the nonlinear influence of the sea area site is calculated; The soil of the marine site is described by the elastoplastic dynamic constitutive method, and the fully coupled superstructure-foundation-soil system is directly constructed to realize the numerical simulation based on the direct coupling method; on this basis, the structural dynamic response considering the full nonlinear effect of the marine site is calculated; Calculate the dynamic response of the unstructured marine site model, calibrate the equivalent linearized soil parameters based on the maximum shear strain level of each soil layer; then use the calibration value to define the soil, construct the upper structure-foundation-foundation overall system, and realize numerical simulation based on the step-by-step coupling method; on this basis, calculate the dynamic response of the structure considering the original nonlinear effect of the marine site; By comparing and analyzing the structural dynamic response results of the superstructure model and the direct coupling method model, the full nonlinear impact of the sea site is quantitatively analyzed; By comparing and analyzing the structural dynamic response results of the direct coupling method model and the step-by-step coupling method model, the influence of additional nonlinearity of the sea area site is quantitatively analyzed.

2. The quantitative analysis method of full nonlinearity and additional nonlinearity of a marine site under dynamic load according to claim 1 is characterized by: The superstructure includes structures and components above the seabed and foundation. The numerical simulation is based on the finite element analysis method to establish a model. The material of the superstructure adopts linear elastic constitutive simulation, and a fixed boundary is applied at the bottom of the superstructure to simulate ideal rigid foundation conditions.

3. The quantitative analysis method of full nonlinearity and additional nonlinearity of a marine site under dynamic load according to claim 1 is characterized by: When implementing the numerical simulation based on the direct coupling method, a fully coupled system model of the superstructure-foundation-flexible foundation considering the SSI effect is constructed, and the dynamic nonlinearity and complex characteristics of the soil material of the marine site are described by the elastoplastic constitutive method.

4. The quantitative analysis method of full nonlinearity and additional nonlinearity of a marine site under dynamic load according to claim 1 is characterized by: In the process of realizing the numerical simulation based on the step-by-step coupling method, firstly, a site model is established only for the sea area site that does not include the superstructure and the foundation, the elastic-plastic constitutive method is used to describe the dynamic nonlinearity and complex characteristics of the soil, the dynamic load is applied, the maximum shear strain level of each soil layer is calculated, and 0.65 times the maximum shear strain level is taken as the equivalent shear strain, and the corresponding values ​​are calibrated on the stiffness parameter and damping parameter curves; then, the calibrated equivalent stiffness parameters and equivalent damping parameters compatible with the soil unit strain are used as input parameters of the viscoelastic soil body to construct the superstructure-foundation-foundation overall system.

5. The quantitative analysis method of full nonlinearity and additional nonlinearity of a marine site under dynamic load according to claim 1 is characterized by: When calculating the structural dynamic response under ideal rigid foundation conditions without considering the nonlinear effects of the sea area site, a dynamic time-history load is applied to the superstructure model, and the dynamic response of the superstructure without considering the nonlinear effects of the sea area site is calculated in the time domain.

6. The quantitative analysis method of full nonlinearity and additional nonlinearity of a marine site under dynamic load according to claim 1 is characterized by: When calculating the structural dynamic response considering the full nonlinear effects of the sea area site, dynamic time-history loads are applied to the direct coupling method model, and the dynamic response of the superstructure considering the full nonlinear effects of the sea area site is calculated in the time domain.

7. The quantitative analysis method of full nonlinearity and additional nonlinearity of a marine site under dynamic load according to claim 1 is characterized by: When calculating the dynamic response of the structure considering the influence of the original nonlinear effect of the sea area site, the dynamic time-history load is applied from the step-by-step coupling method model, and the dynamic response of the superstructure considering the influence of the original nonlinear effect of the sea area site is calculated in the time domain.

8. A quantitative analysis system for full nonlinearity and additional nonlinearity of marine sites under dynamic loads, characterized in that: include: The upper structure numerical simulation module is used to realize the upper structure numerical simulation by establishing the upper structure model; On this basis, the structural dynamic response without considering the nonlinear effect of the sea area site under the ideal rigid foundation condition is calculated; The numerical simulation module based on the direct coupling method is used to describe the soil of the marine site with the elastoplastic dynamic constitutive model, directly construct a fully coupled superstructure-foundation-foundation overall system, and realize numerical simulation based on the direct coupling method; on this basis, the structural dynamic response considering the full nonlinear effect of the marine site is calculated; A numerical simulation module based on the step-by-step coupling method is used to calculate the dynamic response of the unstructured marine site model and calibrate the equivalent linearized soil parameters based on the maximum shear strain level of each soil layer; Then, the soil is defined by using the calibration value, and the overall system of superstructure-foundation-soil is constructed to realize the numerical simulation based on the step-by-step coupling method; on this basis, the calculation considers the influence of the original nonlinear effect of the sea area site on the structural dynamic response; Full nonlinear quantitative analysis module, which is used to quantitatively analyze the full nonlinear impact of the sea area site by comparing and analyzing the structural dynamic response results of the superstructure model and the direct coupling method model; The additional nonlinear quantitative analysis module is used to quantitatively analyze the impact of additional nonlinearity on the sea area site by comparing the structural dynamic response results of the direct coupling method model and the step-by-step coupling method model.

9. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the program, the steps of a quantitative analysis method of full nonlinearity and additional nonlinearity of a sea area site under dynamic load as described in any one of claims 1 to 7 are implemented.

10. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of a quantitative analysis method of full nonlinearity and additional nonlinearity of a marine site under dynamic load as described in any one of claims 1 to 7 are implemented.

Images