Impact resistance design method and system for composite ocean structure

Abstract

The invention discloses an anti-impact design method and system for a composite ocean structure. The method comprises the steps that material information of a composite and structural information of the ocean structure are obtained; setting a comprehensive influence function of material attributes and structural geometry impact resistance, a comprehensive influence function of impact energy and environmental condition impact resistance, and a comprehensive influence function of impact energy and environmental condition impact resistance; the comprehensive influence function of the impact resistance of the material lamination structure and the impact angle and the comprehensive influence function of the impact resistance of the material fatigue characteristic and the long-term environmental exposure are calculated according to the material information and the structure information; calculating a first index of the impact resistance, a second index of the impact resistance, a third index of the impact resistance, a fourth index of the impact resistance and a fifth index of the impact resistance; and performing weighted average on all indexes to obtain a final index, and fitting each comprehensive influence function to enable the final index to be close to a preset impact resistance design threshold value.

Description

Technical Field

[0001] The present invention belongs to the technical field of impact resistance design of composite material marine structures, and more specifically, relates to an impact resistance design method and system for composite material marine structures. Background Art

[0002] Composite marine structures refer to marine engineering structures built with composite materials. These structures are widely used in ships, offshore platforms, offshore pipelines, buoys, etc. Compared with traditional materials, composite materials have the advantages of light weight, high strength, corrosion resistance, and fatigue resistance, so they are increasingly used in marine engineering.

[0003] Key Features and Benefits

[0004] Lightweight and high strength: Composite materials are generally lighter than metals but have higher strength, which makes them very useful in weight-sensitive marine applications.

[0005] Corrosion resistance: The marine environment contains a large amount of salt and moisture, which can easily cause corrosion of traditional metal materials, while composite materials have excellent corrosion resistance.

[0006] Good fatigue resistance: The multi-directional fiber structure of the composite material gives it good fatigue resistance and is suitable for long-term use.

[0007] High design flexibility: Composite materials can adjust the material properties to meet specific design requirements by changing the fiber type, arrangement and matrix material.

[0008] However, there is no technical solution in the prior art that can take into account the impact of multiple factors on the impact resistance of marine structures, thereby providing assistance for impact resistance design. Summary of the invention

[0009] In order to solve the above technical problems, the present invention proposes an impact-resistant design method for a composite marine structure, comprising:

[0010] Acquire material information of composite materials and structural information of marine structures, wherein the material information includes: Young's modulus of the material, density of the material, material strength, fatigue strength of the material and fatigue life of the material, and the structural information includes: thickness and length of each structure in the marine structure;

[0011] The comprehensive influence function of material properties and structural geometry on the impact resistance, the comprehensive influence function of impact energy and environmental conditions on the impact resistance, the comprehensive influence function of impact energy and environmental conditions on the impact resistance, the comprehensive influence function of material lamination structure and impact angle on the impact resistance, and the comprehensive influence function of material fatigue characteristics and long-term environmental exposure on the impact resistance are respectively set, and according to the material information and the structural information, the first index of the impact resistance, the second index of the impact resistance, the third index of the impact resistance, the fourth index of the impact resistance, and the fifth index of the impact resistance are calculated;

[0012] All indicators are weighted averaged to obtain the final indicator, and each comprehensive influence function is fitted to make the final indicator close to the preset impact resistance design threshold.

[0013] Furthermore, the comprehensive influence function of material properties and structural geometry on the impact resistance includes:

[0014]

[0015] Among them, R 1 is the first indicator of impact resistance, n is the number of materials, a i is the weight of the i-th material, E i is the Young's modulus of the i-th material in the composite material, α i is the first adjustment factor of Young's modulus of the ith material, ρ i is the density of the i-th material in the composite material, β i is the adjustment factor for the density of the i-th material, m is the number of structures, b j is the weight of the j-th structure, t j is the thickness of the jth structure in the marine structure, γ j is the adjustment factor for the thickness of the j-th structure, δ j is the adjustment factor for the length of the j-th structure, l j is the length of the jth structure in the marine structure.

[0016] Furthermore, the comprehensive influence function of impact energy and environmental conditions on the anti-impact capability includes:

[0017]

[0018] Among them, R 2 is the second indicator of impact resistance, p is the amount of material, c is k is the weight of the kth material, η k is the second adjustment factor of Young's modulus of the ith material, E k is the Young's modulus of the kth material in the composite material, q is the number of impacts, d l′is the weight of the l′th impact, θ l′ is the adjustment factor of the velocity of the l′th impact, λ l′ is the adjustment factor for the energy of the l′th impact, E′ l′ is the energy of the l′th impact of seawater on the marine structure, v l′ is the velocity of the first impact of seawater on the marine structure, e m′ is the first weight of the m′th environment scene, μ m′ is the adjustment factor of the ambient temperature of the m′th ambient scene, ν m′ is the adjustment factor of the ambient humidity of the m′th environmental scene, T m′ is the ambient temperature of the m′th ambient scene, H m′ is the ambient humidity of the m′th ambient scene, and r is the number of ambient scenes.

[0019] Furthermore, the comprehensive influence function of the material lamination structure and the impact angle on the impact resistance includes:

[0020]

[0021] Among them, R 3 is the third indicator of impact resistance, s is the number of layers of the composite material, and f n′ is the weight of the n′th layer of material, φ n′ is the adjustment factor of the material strength of the n′th layer, χ n′ is the adjustment factor for the thickness of the n′th layer of material, σ n′ is the material strength of the n′th layer of the composite material, λ n′ is the thickness of the n′th layer of the composite material, q is the number of impacts, g is o is the weight of the oth impact, ψ o is the adjustment factor of the angle of the oth impact, θ o is the angle of the oth impact of seawater on the marine structure.

[0022] Furthermore, the comprehensive influence function of material fatigue properties and long-term environmental exposure on impact resistance includes:

[0023]

[0024] Among them, R 4 is the fourth indicator of impact resistance, n is the number of materials, h is u′ is the weight of the u′th material, ω u′ is the adjustment factor for the fatigue strength of the u′th material, ζ u′ is the adjustment factor for the fatigue life of the u′th material, D u′ is the fatigue strength of the u′th material in the composite material, τu′ is the fatigue life of the u′th material in the composite material, r is the number of environmental scenarios, i′ q′ is the second weight of the q′th environment scene, L q′ is the adjustment factor for the long-term exposure pressure of the q′th environmental scenario, P q′ is the long-term exposure pressure of the q′th environmental scenario.

[0025] The present invention also provides an impact-resistant design system for composite marine structures, comprising:

[0026] An information acquisition module is used to acquire material information of composite materials and structural information of marine structures, wherein the material information includes: Young's modulus of the material, density of the material, material strength, fatigue strength of the material and fatigue life of the material, and the structural information includes: thickness and length of each structure in the marine structure;

[0027] Setting a function module, used to respectively set a comprehensive influence function of material properties and structural geometry on the anti-impact capability, a comprehensive influence function of impact energy and environmental conditions on the anti-impact capability, a comprehensive influence function of impact energy and environmental conditions on the anti-impact capability, a comprehensive influence function of material lamination structure and impact angle on the anti-impact capability, and a comprehensive influence function of material fatigue characteristics and long-term environmental exposure on the anti-impact capability, and calculate a first indicator of the anti-impact capability, a second indicator of the anti-impact capability, a third indicator of the anti-impact capability, a fourth indicator of the anti-impact capability, and a fifth indicator of the anti-impact capability according to the material information and the structural information;

[0028] The fitting module is used to perform weighted averaging of all indicators to obtain a final indicator, and to fit each comprehensive influence function so that the final indicator is close to a preset impact resistance design threshold.

[0029] Furthermore, the comprehensive influence function of material properties and structural geometry on the impact resistance includes:

[0030]

[0031] Among them, R 1 is the first indicator of impact resistance, n is the number of materials, a i is the weight of the i-th material, E i is the Young's modulus of the i-th material in the composite material, α i is the first adjustment factor of Young's modulus of the ith material, ρ i is the density of the i-th material in the composite material, β i is the adjustment factor for the density of the i-th material, m is the number of structures, b j is the weight of the j-th structure, t jis the thickness of the jth structure in the marine structure, γ j is the adjustment factor for the thickness of the j-th structure, δ j is the adjustment factor for the length of the j-th structure, l j is the length of the jth structure in the marine structure.

[0032] Furthermore, the comprehensive influence function of impact energy and environmental conditions on the anti-impact capability includes:

[0033]

[0034] Among them, R 2 is the second indicator of impact resistance, p is the amount of material, c is k is the weight of the kth material, η k is the second adjustment factor of Young's modulus of the ith material, E k is the Young's modulus of the kth material in the composite material, q is the number of impacts, d l′ is the weight of the l′th impact, θ l′ is the adjustment factor of the velocity of the l′th impact, λ l′ is the adjustment factor for the energy of the l′th impact, E′ l′ is the energy of the l′th impact of seawater on the marine structure, v l′ is the velocity of the first impact of seawater on the marine structure, e m′ is the first weight of the m′th environment scene, μ m′ is the adjustment factor of the ambient temperature of the m′th ambient scene, ν m′ is the adjustment factor of the ambient humidity of the m′th environmental scene, T m′ is the ambient temperature of the m′th ambient scene, H m′ is the ambient humidity of the m′th ambient scene, and r is the number of ambient scenes.

[0035] Furthermore, the comprehensive influence function of the material lamination structure and the impact angle on the impact resistance includes:

[0036]

[0037] Among them, R 3 is the third indicator of impact resistance, s is the number of layers of the composite material, and f n′ is the weight of the n′th layer of material, φ n′ is the adjustment factor of the material strength of the n′th layer, χ n′ is the adjustment factor for the thickness of the n′th layer of material, σ n′ is the material strength of the n′th layer of the composite material, λ n′ is the thickness of the n′th layer of the composite material, q is the number of impacts, g iso is the weight of the oth impact, ψ o is the adjustment factor of the angle of the oth impact, θ o is the angle of the oth impact of seawater on the marine structure.

[0038] Furthermore, the comprehensive influence function of material fatigue properties and long-term environmental exposure on impact resistance includes:

[0039]

[0040] Among them, R 4 is the fourth indicator of impact resistance, n is the number of materials, h is u′ is the weight of the u′th material, ω u′ is the adjustment factor for the fatigue strength of the u′th material, ζ u′ is the adjustment factor for the fatigue life of the u′th material, D u′ is the fatigue strength of the u′th material in the composite material, τ u′ is the fatigue life of the u′th material in the composite material, r is the number of environmental scenarios, i′ q′ is the second weight of the q′th environmental scene, L q′ is the adjustment factor for the long-term exposure pressure of the q′th environmental scenario, P q′ is the long-term exposure pressure of the q′th environmental scenario.

[0041] In general, the above technical solution conceived by the present invention has the following beneficial effects compared with the prior art:

[0042] The present invention fully considers the influence of various factors on the impact resistance of marine structures by setting comprehensive influence functions of material properties and structural geometry on the impact resistance, comprehensive influence function of impact energy and environmental conditions on the impact resistance, comprehensive influence function of impact energy and environmental conditions on the impact resistance, comprehensive influence function of material laminated structure and impact angle on the impact resistance, and comprehensive influence function of material fatigue characteristics and long-term environmental exposure on the impact resistance, thereby providing reliable design ideas for researchers and developers. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 is a flow chart of the method of embodiment 1 of the present invention;

[0044] Figure 2 It is a structural diagram of the system of embodiment 2 of the present invention. DETAILED DESCRIPTION

[0045] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0046] The method provided by the present invention can be implemented in the following terminal environment, and the terminal may include one or more of the following components: a processor, a storage medium, and a display screen. The storage medium stores at least one instruction, and the instruction is loaded and executed by the processor to implement the method described in the following embodiment.

[0047] The processor may include one or more processing cores. The processor uses various interfaces and lines to connect various parts in the entire terminal, and executes various functions of the terminal and processes data by running or executing instructions, programs, code sets or instruction sets stored in the storage medium, and calling data stored in the storage medium.

[0048] The storage medium may include a random access memory (RAM) or a read-only memory (ROM). The storage medium may be used to store instructions, programs, codes, code sets or instructions.

[0049] The display screen is used to display the user interface of each application.

[0050] In addition, those skilled in the art can understand that the structure of the above terminal does not constitute a limitation on the terminal, and the terminal may include more or fewer components, or combine certain components, or arrange the components differently. For example, the terminal also includes components such as a radio frequency circuit, an input unit, a sensor, an audio circuit, and a power supply, which will not be described in detail here.

[0051] Example 1

[0052] like Figure 1 As shown, an embodiment of the present invention provides a method for designing impact resistance of a composite marine structure (for example, the marine structure may be a port facility, a drilling platform, or marine operating equipment, etc.), comprising:

[0053] Step 101, obtaining material information of the composite material and structural information of the marine structure, wherein the material information includes: Young's modulus of the material, density of the material, material strength, fatigue strength of the material and fatigue life of the material, and the structural information includes: thickness and length of each structure in the marine structure;

[0054] Step 102, respectively setting a comprehensive influence function of material properties and structural geometry on the anti-impact capability, a comprehensive influence function of impact energy and environmental conditions on the anti-impact capability, a comprehensive influence function of impact energy and environmental conditions on the anti-impact capability, a comprehensive influence function of material lamination structure and impact angle on the anti-impact capability, and a comprehensive influence function of material fatigue characteristics and long-term environmental exposure on the anti-impact capability, and calculating a first indicator of the anti-impact capability, a second indicator of the anti-impact capability, a third indicator of the anti-impact capability, a fourth indicator of the anti-impact capability, and a fifth indicator of the anti-impact capability based on the material information and the structural information;

[0055] Specifically, the comprehensive influence functions of material properties and structural geometry on the impact resistance include:

[0056]

[0057] Among them, R 1 is the first indicator of impact resistance, n is the number of materials, a i is the weight of the i-th material, E i is the Young's modulus of the i-th material in the composite material, α i is the first adjustment factor of Young's modulus of the ith material, ρ i is the density of the i-th material in the composite material, β i is the adjustment factor for the density of the i-th material, m is the number of structures, b j is the weight of the j-th structure, t j is the thickness of the jth structure in the marine structure, γ j is the adjustment factor for the thickness of the j-th structure, δ j is the adjustment factor for the length of the j-th structure, l j is the length of the jth structure in the marine structure.

[0058] Specifically, the comprehensive influence function of impact energy and environmental conditions on the anti-impact capability includes:

[0059]

[0060] Among them, R 2 is the second indicator of impact resistance, p is the amount of material, c is k is the weight of the kth material, η k is the second adjustment factor of Young's modulus of the ith material, E k is the Young's modulus of the kth material in the composite material, q is the number of impacts, d l′ is the weight of the l′th impact, θ l′ is the adjustment factor of the velocity of the l′th impact, λ l′ is the adjustment factor for the energy of the l′th impact, E′l′ is the energy of the l′th impact of seawater on the marine structure, v l′ is the velocity of the first impact of seawater on the marine structure, e m′ is the first weight of the m′th environment scene, μ m′ is the adjustment factor of the ambient temperature of the m′th ambient scene, V m′ is the adjustment factor of the ambient humidity of the m′th environmental scene, T m′ is the ambient temperature of the m′th ambient scene, H m′ is the ambient humidity of the m′th ambient scene, r is the number of ambient scenes, for example, the ambient scenes may include a rainy day scene, a sunny day scene, a thunderstorm scene, a cloudy day scene, etc.

[0061] Specifically, the comprehensive influence function of the material lamination structure and the impact angle on the impact resistance includes:

[0062]

[0063] Among them, R 3 is the third indicator of impact resistance, s is the number of layers of the composite material, and f n′ is the weight of the n′th layer of material, φ n′ is the adjustment factor of the material strength of the n′th layer, χ n′ is the adjustment factor for the thickness of the n′th layer of material, σ n′ is the material strength of the n′th layer of the composite material, λ n′ is the thickness of the n′th layer of the composite material, q is the number of impacts, g is o is the weight of the oth impact, ψ o is the adjustment factor of the angle of the oth impact, θ o is the angle of the oth impact of seawater on the marine structure.

[0064] Specifically, the comprehensive influence function of material fatigue properties and long-term environmental exposure on impact resistance includes:

[0065]

[0066] Among them, R 4 is the fourth indicator of impact resistance, n is the number of materials, h is u′ is the weight of the u′th material, ω u′ is the adjustment factor for the fatigue strength of the u′th material, ζ u′ is the adjustment factor for the fatigue life of the u′th material, D u′ is the fatigue strength of the u′th material in the composite material, τ u′ is the fatigue life of the u′th material in the composite material, r is the number of environmental scenarios, i′′ is the second weight of the q′th environment scene, L q′ is the adjustment factor for the long-term exposure pressure of the q′th environmental scenario, P q′ is the long-term exposure pressure of the q′th environmental scenario.

[0067] Step 103 , weighted average all the indicators to obtain a final indicator, and fit each comprehensive influence function to make the final indicator close to a preset anti-shock design threshold.

[0068] Example 2

[0069] like Figure 2 As shown, an embodiment of the present invention further provides an impact-resistant design system for a composite marine structure (for example, the marine structure may be a port facility, a drilling platform, or marine operating equipment, etc.), comprising:

[0070] An information acquisition module is used to acquire material information of composite materials and structural information of marine structures, wherein the material information includes: Young's modulus of the material, density of the material, material strength, fatigue strength of the material and fatigue life of the material, and the structural information includes: thickness and length of each structure in the marine structure;

[0071] Setting a function module, used to respectively set a comprehensive influence function of material properties and structural geometry on the anti-impact capability, a comprehensive influence function of impact energy and environmental conditions on the anti-impact capability, a comprehensive influence function of impact energy and environmental conditions on the anti-impact capability, a comprehensive influence function of material lamination structure and impact angle on the anti-impact capability, and a comprehensive influence function of material fatigue characteristics and long-term environmental exposure on the anti-impact capability, and calculate a first indicator of the anti-impact capability, a second indicator of the anti-impact capability, a third indicator of the anti-impact capability, a fourth indicator of the anti-impact capability, and a fifth indicator of the anti-impact capability according to the material information and the structural information;

[0072] Specifically, the comprehensive influence functions of material properties and structural geometry on the impact resistance include:

[0073]

[0074] Among them, R 1 is the first indicator of impact resistance, n is the number of materials, a i is the weight of the i-th material, E i is the Young's modulus of the i-th material in the composite material, α i is the first adjustment factor of Young's modulus of the ith material, ρ i is the density of the i-th material in the composite material, β i is the adjustment factor for the density of the i-th material, m is the number of structures, b jis the weight of the j-th structure, t j is the thickness of the jth structure in the marine structure, γ j is the adjustment factor for the thickness of the j-th structure, δ j is the adjustment factor for the length of the j-th structure, l j is the length of the jth structure in the marine structure.

[0075] Specifically, the comprehensive influence function of impact energy and environmental conditions on the anti-impact capability includes:

[0076]

[0077] Among them, R 2 is the second indicator of impact resistance, p is the amount of material, c is k is the weight of the kth material, η k is the second adjustment factor of Young's modulus of the ith material, E k is the Young's modulus of the kth material in the composite material, q is the number of impacts, d l′ is the weight of the l′th impact, θ l′ is the adjustment factor of the velocity of the l′th impact, λ l′ is the adjustment factor for the energy of the l′th impact, E′ l′ is the energy of the l′th impact of seawater on the marine structure, v l′ is the velocity of the first impact of seawater on the marine structure, e m′ is the first weight of the m′th environment scene, μ m′ is the adjustment factor of the ambient temperature of the m′th ambient scene, ν m′ is the adjustment factor of the ambient humidity of the m′th environmental scene, T m′ is the ambient temperature of the m′th ambient scene, H m′ is the ambient humidity of the m′th ambient scene, r is the number of ambient scenes, for example, the ambient scenes may include a rainy day scene, a sunny day scene, a thunderstorm scene, a cloudy day scene, etc.

[0078] Specifically, the comprehensive influence function of the material lamination structure and the impact angle on the impact resistance includes:

[0079]

[0080] Among them, R 3 is the third indicator of impact resistance, s is the number of layers of the composite material, and f n′ is the weight of the n′th layer of material, φ n′ is the adjustment factor of the material strength of the n′th layer, χ n′ is the adjustment factor for the thickness of the n′th layer of material, σ n′is the material strength of the n′th layer of the composite material, λ n′ is the thickness of the n′th layer of the composite material, q is the number of impacts, g is o is the weight of the oth impact, ψ o is the adjustment factor of the angle of the oth impact, θ o is the angle of the oth impact of seawater on the marine structure.

[0081] Specifically, the comprehensive influence function of material fatigue properties and long-term environmental exposure on impact resistance includes:

[0082]

[0083] Among them, R 4 is the fourth indicator of impact resistance, n is the number of materials, h is u′ is the weight of the u′th material, ω u′ is the adjustment factor for the fatigue strength of the u′th material, ζ u′ is the adjustment factor for the fatigue life of the u′th material, D u′ is the fatigue strength of the u′th material in the composite material, τ u′ is the fatigue life of the u′th material in the composite material, r is the number of environmental scenarios, i′ q′ is the second weight of the q′th environment scene, L q′ is the adjustment factor for the long-term exposure pressure of the q′th environmental scenario, P q′ is the long-term exposure pressure of the q′th environmental scenario.

[0084] The fitting module is used to perform weighted averaging of all indicators to obtain a final indicator, and to fit each comprehensive influence function so that the final indicator is close to a preset impact resistance design threshold.

[0085] Example 3

[0086] The embodiment of the present invention further provides a storage medium storing a plurality of instructions, wherein the instructions are used to implement the impact resistance design method for a composite material marine structure.

[0087] Optionally, in this embodiment, the above storage medium may be located in any computer terminal in a computer terminal group in a computer network, or in any mobile terminal in a mobile terminal group.

[0088] Optionally, in this embodiment, the storage medium is configured to store program codes for executing the following steps: obtaining material information of the composite material and structural information of the marine structure, wherein the material information includes: Young's modulus of the material, density of the material, material strength, fatigue strength of the material and fatigue life of the material, and the structural information includes: thickness and length of each structure in the marine structure;

[0089] The comprehensive influence function of material properties and structural geometry on the impact resistance, the comprehensive influence function of impact energy and environmental conditions on the impact resistance, the comprehensive influence function of impact energy and environmental conditions on the impact resistance, the comprehensive influence function of material lamination structure and impact angle on the impact resistance, and the comprehensive influence function of material fatigue characteristics and long-term environmental exposure on the impact resistance are respectively set, and according to the material information and the structural information, the first index of the impact resistance, the second index of the impact resistance, the third index of the impact resistance, the fourth index of the impact resistance, and the fifth index of the impact resistance are calculated;

[0090] Specifically, the comprehensive influence functions of material properties and structural geometry on the impact resistance include:

[0091]

[0092] Among them, R 1 is the first indicator of impact resistance, n is the number of materials, a i is the weight of the i-th material, E i is the Young's modulus of the i-th material in the composite material, α i is the first adjustment factor of Young's modulus of the ith material, ρ i is the density of the i-th material in the composite material, β i is the adjustment factor for the density of the i-th material, m is the number of structures, b j is the weight of the j-th structure, t j is the thickness of the jth structure in the marine structure, γ j is the adjustment factor for the thickness of the j-th structure, δ j is the adjustment factor for the length of the j-th structure, l j is the length of the jth structure in the marine structure.

[0093] Specifically, the comprehensive influence function of impact energy and environmental conditions on the anti-impact capability includes:

[0094]

[0095] Among them, R 2 is the second indicator of impact resistance, p is the amount of material, c is k is the weight of the kth material, η kis the second adjustment factor of Young's modulus of the ith material, E k is the Young's modulus of the kth material in the composite material, q is the number of impacts, d l′ is the weight of the l′th impact, θ l′ is the adjustment factor of the velocity of the l′th impact, λ l′ is the adjustment factor for the energy of the l′th impact, E′ l′ is the energy of the l′th impact of seawater on the marine structure, v l′ is the velocity of the first impact of seawater on the marine structure, e m′ is the first weight of the m′th environment scene, μ m′ is the adjustment factor of the ambient temperature of the m′th ambient scene, ν m′ is the adjustment factor of the ambient humidity of the m′th environmental scene, T m′ is the ambient temperature of the m′th ambient scene, H m′ is the ambient humidity of the m′th ambient scene, r is the number of ambient scenes, for example, the ambient scenes may include a rainy day scene, a sunny day scene, a thunderstorm scene, a cloudy day scene, etc.

[0096] Specifically, the comprehensive influence function of the material lamination structure and the impact angle on the impact resistance includes:

[0097]

[0098] Among them, R 3 is the third indicator of impact resistance, s is the number of layers of the composite material, and f n′ is the weight of the n′th layer of material, φ n′ is the adjustment factor of the material strength of the n′th layer, χ n′ is the adjustment factor for the thickness of the n′th layer of material, σ n′ is the material strength of the n′th layer of the composite material, λ n′ is the thickness of the n′th layer of the composite material, q is the number of impacts, g is o is the weight of the oth impact, ψ o is the adjustment factor of the angle of the oth impact, θ o is the angle of the oth impact of seawater on the marine structure.

[0099] Specifically, the comprehensive influence function of material fatigue properties and long-term environmental exposure on impact resistance includes:

[0100]

[0101] Among them, R 4 is the fourth indicator of impact resistance, n is the number of materials, h is u′is the weight of the u′th material, ω u′ is the adjustment factor for the fatigue strength of the u′th material, ζ u′ is the adjustment factor for the fatigue life of the u′th material, D u′ is the fatigue strength of the u′th material in the composite material, τ u′ is the fatigue life of the u′th material in the composite material, r is the number of environmental scenarios, i′ q′ is the second weight of the q′th environment scene, L q′ is the adjustment factor for the long-term exposure pressure of the q′th environmental scenario, P q′ is the long-term exposure pressure of the q′th environmental scenario.

[0102] All indicators are weighted averaged to obtain the final indicator, and each comprehensive influence function is fitted to make the final indicator close to the preset impact resistance design threshold.

[0103] Example 4

[0104] An embodiment of the present invention also proposes an electronic device, including a processor and a storage medium connected to the processor, wherein the storage medium stores a plurality of instructions, and the instructions can be loaded and executed by the processor so that the processor can execute the impact-resistant design method for a composite marine structure.

[0105] Specifically, the electronic device of this embodiment may be a computer terminal, and the computer terminal may include: one or more processors, and a storage medium.

[0106] Among them, the storage medium can be used to store software programs and modules, such as the impact-resistant design method for a composite marine structure in an embodiment of the present invention, and the corresponding program instructions / modules. The processor executes various functional applications and data processing by running the software programs and modules stored in the storage medium, that is, realizing the above-mentioned impact-resistant design method for a composite marine structure. The storage medium may include a high-speed random storage medium, and may also include a non-volatile storage medium, such as one or more magnetic storage systems, flash memory, or other non-volatile solid-state storage media. In some instances, the storage medium may further include a storage medium remotely arranged relative to the processor, and these remote storage media may be connected to the terminal via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0107] The processor can call the information and application program stored in the storage medium through the transmission system to perform the following steps: obtaining material information of the composite material and structural information of the marine structure, wherein the material information includes: Young's modulus of the material, density of the material, material strength, fatigue strength of the material and fatigue life of the material, and the structural information includes: thickness and length of each structure in the marine structure;

[0108] The comprehensive influence function of material properties and structural geometry on the impact resistance, the comprehensive influence function of impact energy and environmental conditions on the impact resistance, the comprehensive influence function of impact energy and environmental conditions on the impact resistance, the comprehensive influence function of material lamination structure and impact angle on the impact resistance, and the comprehensive influence function of material fatigue characteristics and long-term environmental exposure on the impact resistance are respectively set, and according to the material information and the structural information, the first index of the impact resistance, the second index of the impact resistance, the third index of the impact resistance, the fourth index of the impact resistance, and the fifth index of the impact resistance are calculated;

[0109] Specifically, the comprehensive influence functions of material properties and structural geometry on the impact resistance include:

[0110]

[0111] Among them, R 1 is the first indicator of impact resistance, n is the number of materials, a i is the weight of the i-th material, E i is the Young's modulus of the i-th material in the composite material, α i is the first adjustment factor of Young's modulus of the ith material, ρ i is the density of the i-th material in the composite material, β i is the adjustment factor for the density of the i-th material, m is the number of structures, b j is the weight of the j-th structure, t j is the thickness of the jth structure in the marine structure, γ j is the adjustment factor for the thickness of the j-th structure, δ j is the adjustment factor for the length of the j-th structure, l j is the length of the jth structure in the marine structure.

[0112] Specifically, the comprehensive influence function of impact energy and environmental conditions on the anti-impact capability includes:

[0113]

[0114] Among them, R 2 is the second indicator of impact resistance, p is the amount of material, c is k is the weight of the kth material, ηk is the second adjustment factor of Young's modulus of the ith material, E k is the Young's modulus of the kth material in the composite material, q is the number of impacts, d l′ is the weight of the l′th impact, θ l′ is the adjustment factor of the velocity of the l′th impact, λ l′ is the adjustment factor for the energy of the l′th impact, E′ l′ is the energy of the l′th impact of seawater on the marine structure, v l′ is the velocity of the first impact of seawater on the marine structure, e m′ is the first weight of the m′th environment scene, μ m′ is the adjustment factor of the ambient temperature of the m′th ambient scene, ν m′ is the adjustment factor of the ambient humidity of the m′th environmental scene, T m′ is the ambient temperature of the m′th ambient scene, H m′ is the ambient humidity of the m′th ambient scene, r is the number of ambient scenes, for example, the ambient scenes may include a rainy day scene, a sunny day scene, a thunderstorm scene, a cloudy day scene, etc.

[0115] Specifically, the comprehensive influence function of the material lamination structure and the impact angle on the impact resistance includes:

[0116]

[0117] Among them, R 3 is the third indicator of impact resistance, s is the number of layers of the composite material, and f n′ is the weight of the n′th layer of material, φ n′ is the adjustment factor of the material strength of the n′th layer, χ n′ is the adjustment factor for the thickness of the n′th layer of material, σ n′ is the material strength of the n′th layer of the composite material, λ n′ is the thickness of the n′th layer of the composite material, q is the number of impacts, g is o is the weight of the oth impact, ψ o is the adjustment factor of the angle of the oth impact, θ o is the angle of the oth impact of seawater on the marine structure.

[0118] Specifically, the comprehensive influence function of material fatigue properties and long-term environmental exposure on impact resistance includes:

[0119]

[0120] Among them, R 4 is the fourth indicator of impact resistance, n is the number of materials, h is u′is the weight of the u′th material, ω u′ is the adjustment factor for the fatigue strength of the u′th material, ζ u′ is the adjustment factor for the fatigue life of the u′th material, D u′ is the fatigue strength of the u′th material in the composite material, τ u′ is the fatigue life of the u′th material in the composite material, r is the number of environmental scenarios, l′ q′ is the second weight of the q′th environment scene, L q′ is the adjustment factor for the long-term exposure pressure of the q′th environmental scenario, P q′ is the long-term exposure pressure of the q′th environmental scenario.

[0121] All indicators are weighted averaged to obtain the final indicator, and each comprehensive influence function is fitted to make the final indicator close to the preset impact resistance design threshold.

[0122] The serial numbers of the above embodiments of the present invention are only for description and do not represent the advantages or disadvantages of the embodiments.

[0123] In the above embodiments of the present invention, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0124] In the several embodiments provided by the present invention, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the system embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of units or modules, which can be electrical or other forms.

[0125] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0126] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0127] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions for a computer device (which can be a personal computer, a server or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, read-only storage medium (ROM, Read-Only Memory), random access storage medium (RAM, Random Access Memory), mobile hard disk, magnetic disk or optical disk and other media that can store program codes.

[0128] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. A method for designing impact resistance of composite marine structures, characterized in that: include: Acquire material information of composite materials and structural information of marine structures, wherein the material information includes: Young's modulus of the material, density of the material, material strength, fatigue strength of the material and fatigue life of the material, and the structural information includes: thickness and length of each structure in the marine structure; The comprehensive influence function of material properties and structural geometry on the impact resistance, the comprehensive influence function of impact energy and environmental conditions on the impact resistance, the comprehensive influence function of impact energy and environmental conditions on the impact resistance, the comprehensive influence function of material lamination structure and impact angle on the impact resistance, and the comprehensive influence function of material fatigue characteristics and long-term environmental exposure on the impact resistance are respectively set, and according to the material information and the structural information, the first index of the impact resistance, the second index of the impact resistance, the third index of the impact resistance, the fourth index of the impact resistance, and the fifth index of the impact resistance are calculated; All indicators are weighted averaged to obtain the final indicator, and each comprehensive influence function is fitted to make the final indicator close to the preset impact resistance design threshold.

2. The impact resistance design method for a composite material marine structure according to claim 1, characterized in that: The comprehensive influence functions of material properties and structural geometry on impact resistance include: Among them, R1 is the first indicator of impact resistance, n is the number of materials, a i is the weight of the i-th material, E i is the Young's modulus of the i-th material in the composite material, α i is the first adjustment factor of Young's modulus of the ith material, ρ i is the density of the i-th material in the composite material, β i is the adjustment factor for the density of the i-th material, m is the number of structures, b j is the weight of the j-th structure, t j is the thickness of the jth structure in the marine structure, γ j is the adjustment factor for the thickness of the j-th structure, δ j is the adjustment factor for the length of the j-th structure, l j is the length of the jth structure in the marine structure.

3. The impact resistance design method for a composite material marine structure according to claim 1, characterized in that: The comprehensive impact function of impact energy and environmental conditions on the impact resistance includes: Among them, R2 is the second indicator of impact resistance, p is the amount of material, c k is the weight of the kth material, η k is the second adjustment factor of Young's modulus of the ith material, E k is the Young's modulus of the kth material in the composite material, q is the number of impacts, d l′ is the weight of the l′th impact, θ l′ is the adjustment factor of the velocity of the l′th impact, λ l′ is the adjustment factor for the energy of the l′th impact, E′ l′ is the energy of the l′th impact of seawater on the marine structure, v l′ is the velocity of the first impact of seawater on the marine structure, e m′ is the first weight of the m′th environment scene, μ m′ is the adjustment factor of the ambient temperature of the m′th ambient scene, ν m′ is the adjustment factor of the ambient humidity of the m′th environmental scene, T m′ is the ambient temperature of the m′th ambient scene, H m′ is the ambient humidity of the m′th ambient scene, and r is the number of ambient scenes.

4. The impact resistance design method for a composite material marine structure according to claim 1, characterized in that: The comprehensive influence functions of material lamination structure and impact angle on impact resistance include: Among them, R3 is the third index of impact resistance, s is the number of layers of the composite material, and f n′ is the weight of the n′th layer of material, φ n′ is the adjustment factor of the material strength of the n′th layer, χ n′ is the adjustment factor for the thickness of the n′th layer of material, σ n′ is the material strength of the n′th layer of the composite material, λ n′ is the thickness of the n′th layer of the composite material, q is the number of impacts, g is o is the weight of the oth impact, ψ o is the adjustment factor of the angle of the oth impact, θ o is the angle of the oth impact of seawater on the marine structure.

5. The impact resistance design method for a composite marine structure according to claim 1, characterized in that: The comprehensive influencing functions of material fatigue properties and long-term environmental exposure and impact resistance include: Among them, R4 is the fourth index of impact resistance, n is the number of materials, h is u′ is the weight of the u′th material, ω u′ is the adjustment factor for the fatigue strength of the u′th material, ζ u′ is the adjustment factor for the fatigue life of the u′th material, D u′ is the fatigue strength of the u′th material in the composite material, τ u′ is the fatigue life of the u′th material in the composite material, r is the number of environmental scenarios, i′ q′ is the second weight of the q′th environment scene, L q′ is the adjustment factor for the long-term exposure pressure of the q′th environmental scenario, P q′ is the long-term exposure pressure of the q′th environmental scenario.

6. An impact-resistant design system for composite marine structures, characterized in that: include: An information acquisition module is used to acquire material information of composite materials and structural information of marine structures, wherein the material information includes: Young's modulus of the material, density of the material, material strength, fatigue strength of the material and fatigue life of the material, and the structural information includes: thickness and length of each structure in the marine structure; Setting a function module, used to respectively set a comprehensive influence function of material properties and structural geometry on the anti-impact capability, a comprehensive influence function of impact energy and environmental conditions on the anti-impact capability, a comprehensive influence function of impact energy and environmental conditions on the anti-impact capability, a comprehensive influence function of material lamination structure and impact angle on the anti-impact capability, and a comprehensive influence function of material fatigue characteristics and long-term environmental exposure on the anti-impact capability, and calculate a first indicator of the anti-impact capability, a second indicator of the anti-impact capability, a third indicator of the anti-impact capability, a fourth indicator of the anti-impact capability, and a fifth indicator of the anti-impact capability according to the material information and the structural information; The fitting module is used to perform weighted averaging of all indicators to obtain a final indicator, and to fit each comprehensive influence function so that the final indicator is close to a preset impact resistance design threshold.

7. The impact-resistant design system for composite marine structures according to claim 6, characterized in that: The comprehensive influence functions of material properties and structural geometry on impact resistance include: Among them, R1 is the first indicator of impact resistance, n is the number of materials, a i is the weight of the i-th material, E i is the Young's modulus of the i-th material in the composite material, α i is the first adjustment factor of Young's modulus of the ith material, ρ i is the density of the i-th material in the composite material, β i is the adjustment factor for the density of the i-th material, m is the number of structures, b j is the weight of the j-th structure, t j is the thickness of the jth structure in the marine structure, γ j is the adjustment factor for the thickness of the j-th structure, δ j is the adjustment factor for the length of the j-th structure, l j is the length of the jth structure in the marine structure.

8. The impact-resistant design system for composite marine structures according to claim 6, characterized in that: The comprehensive impact function of impact energy and environmental conditions on the impact resistance includes: Among them, R2 is the second indicator of impact resistance, p is the amount of material, c k is the weight of the kth material, η k is the second adjustment factor of Young's modulus of the ith material, E k is the Young's modulus of the kth material in the composite material, q is the number of impacts, d l′ is the weight of the l′th impact, θ l′ is the adjustment factor of the velocity of the l′th impact, λ l′ is the adjustment factor for the energy of the l′th impact, E′ l′ is the energy of the l′th impact of seawater on the marine structure, v l′ is the velocity of the first impact of seawater on the marine structure, e m′ is the first weight of the m′th environment scene, μ m′ is the adjustment factor of the ambient temperature of the m′th ambient scene, v m′ is the adjustment factor of the ambient humidity of the m′th environmental scene, T m′ is the ambient temperature of the m′th ambient scene, H m′ is the ambient humidity of the m′th ambient scene, and r is the number of ambient scenes.

9. The impact-resistant design system for composite marine structures according to claim 6, characterized in that: The comprehensive influence functions of material lamination structure and impact angle on impact resistance include: Among them, R3 is the third index of impact resistance, s is the number of layers of the composite material, and f n′ is the weight of the n′th layer of material, φ n′ is the adjustment factor of the material strength of the n′th layer, χ n′ is the adjustment factor for the thickness of the n′th layer of material, σ n′ is the material strength of the n′th layer of the composite material, λ n′ is the thickness of the n′th layer of the composite material, q is the number of impacts, g is o is the weight of the oth impact, ψ o is the adjustment factor of the angle of the oth impact, θ o is the angle of the oth impact of seawater on the marine structure.

10. The impact-resistant design system for composite marine structures according to claim 6, characterized in that: The comprehensive influencing functions of material fatigue properties and long-term environmental exposure and impact resistance include: Among them, R4 is the fourth index of impact resistance, n is the number of materials, h is u′ is the weight of the u′th material, ω u′ is the adjustment factor for the fatigue strength of the u′th material, ζ u′ is the adjustment factor for the fatigue life of the u′th material, D u′ is the fatigue strength of the u′th material in the composite material, τ u′ is the fatigue life of the u′th material in the composite material, r is the number of environmental scenarios, i′ q′ is the second weight of the q′th environment scene, L q′ is the adjustment factor for the long-term exposure pressure of the q′th environmental scenario, P q′ is the long-term exposure pressure of the q′th environmental scenario.

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