A wave simulation method and system for the forebay of a coastal power station pump house

Abstract

The invention relates to the technical field of hydraulic structures of coastal power plants, and discloses a wave simulation method and system for a pump house forebay of a coastal power station. According to offshore marine meteorological data and seabed topography conditions, based on spectrum theory and Boussinesq equation, wave height conditions at the inlet of a water intake box culvert are determined; the wave height conditions include wave height, wave period and wavelength; through a physical model test, the wave transmission coefficient of a water intake box culvert under different wave height conditions is calculated; experimental data of the physical model test is collected to obtain a relationship between wavelength, box culvert length and wave transmission coefficient; according to the marine meteorological data, seabed topography conditions and actual engineering data, the wave height of the pump house forebay is predicted; through a multi-step simulation method, the simulation accuracy of the influence of offshore waves on the water intake box culvert is improved, the fluctuation of the pump house forebay is accurately controlled, and the safe and stable operation of the power plant is ensured.

Description

Technical Field

[0001] The invention relates to the technical field of hydraulic structures of coastal power plants, and in particular to a method and system for simulating waves in a forebay of a pump house of a coastal power station. Background Art

[0002] The stable operation of coastal power plants is affected by offshore waves. Coastal power plants are usually located on the coast or offshore areas. Their water diversion systems, pump houses and other hydraulic facilities are often affected by natural factors such as ocean waves and tidal changes. These influences not only cause water level fluctuations, but may also have a significant impact on the stability of the hydraulic structure and operating efficiency of the power plant. The flow, waves and water level changes in the water diversion culvert and the forebay of the pump house are key issues in the design and operation of power plants. Especially under the influence of tidal fluctuations and wind and waves, these areas may experience large water level fluctuations and flow rate changes, affecting the normal operation of the pump house and the power generation capacity of the power plant.

[0003] As the main hydraulic facility connecting the offshore waters with the power plant equipment, the water diversion culvert must be able to effectively cope with the impact of water flow caused by waves. The impact, reflection and transmission effects of waves may cause the water flow in the water diversion culvert to be unstable, and even affect the normal operation of the equipment. Therefore, how to simulate and accurately control the impact of waves has become an important research topic. As part of the water circulation system of the power plant, the water level fluctuation of the pump house forebay directly affects the water absorption efficiency and pumping capacity of the pump house. Especially in the coastal environment affected by waves, when the wave height in the pump house is large, it will cause the water pump to operate abnormally. Relevant regulations require that the wave fluctuation amplitude of the water intake forebay should generally not exceed 0.3m. Therefore, it is very necessary to study the water level fluctuation of the waves entering the pump house forebay from the open sea through the water intake culvert and the water diversion culvert.

[0004] The existing technology has the problem of inaccurate simulation of the impact of waves on the water diversion box culvert, resulting in insufficient control of water level fluctuations in the forebay of the pump house.

[0005] Therefore, there is an urgent need for a wave simulation method and system for the forebay of a coastal power station pump house to improve the simulation accuracy of the impact of offshore waves on the water diversion culvert and further to achieve more precise control of the forebay of the pump house. Summary of the invention

[0006] In order to solve the above technical problems, the present invention provides a method and system for simulating waves in the forebay of a coastal power plant pump house, which can improve the accuracy of wave prediction in the forebay of a coastal power plant pump house.

[0007] The present invention provides a wave simulation method for a coastal power station pump house forebay, comprising the following steps:

[0008] S1. According to offshore ocean meteorological data and seabed topography, based on spectral theory and Boussinesq equation, determine the wave height conditions at the inlet of the water intake culvert;

[0009] The wave height conditions include: wave height, wave period and wavelength;

[0010] S2. Calculate the wave transmission coefficient of the water diversion culvert under different wave height conditions through physical model tests;

[0011] S3. Collect experimental data of physical model test and obtain the relationship between wavelength, culvert length and wave transmission coefficient;

[0012] S4. Predict the wave height in the forebay of the pump house based on the marine meteorological data, seabed topography conditions and actual engineering data.

[0013] Furthermore, the S1 specifically includes:

[0014] S11. Collect offshore oceanographic meteorological data and seabed topographic conditions;

[0015] S12. According to offshore ocean meteorological data and seabed topography conditions, using spectrum theory, calculate offshore wave height conditions;

[0016] S13. According to the offshore wave height conditions, based on the Boussinesq equation, the wave height conditions at the water intake culvert entrance are calculated.

[0017] Furthermore, the S2 specifically includes:

[0018] S21. Determine the scale of the physical model and make the physical model according to the actual marine environment and structural dimensions;

[0019] S22, setting a wave generator to simulate different wave height conditions;

[0020] S23. Calculate the wave transmission coefficient by measuring the wave height data at the water diversion culvert inlet and outlet under different wave height conditions.

[0021] Furthermore, the wave transmission coefficient is defined as:

[0022] The specific calculation formula for the ratio of the wave height at the outlet of the water diversion box culvert to the wave height at the inlet of the water diversion box culvert is:

[0023] Kt=H T / H t ; In the formula, Kt represents the wave transmission coefficient; H T Indicates the wave height at the outlet of the water diversion culvert; H t Indicates the wave height at the inlet of the water diversion culvert.

[0024] Furthermore, the S3 specifically includes:

[0025] S31, collect the experimental data of wavelength, water diversion culvert length and wave transmission coefficient under all different wave height conditions obtained by physical model test and perform preprocessing;

[0026] S32. Establish a curve relationship between wavelength, box culvert length and wave transmission coefficient, and obtain a relationship formula between wavelength, box culvert length and wave transmission coefficient by fitting.

[0027] Furthermore, the relationship between the wavelength, the culvert length and the wave transmission coefficient is:

[0028] ;

[0029] Where, L P represents the length of the box culvert; L represents the wavelength.

[0030] Furthermore, in S4, the wave height of the pump house forebay is predicted based on the marine meteorological data, the seabed topographic conditions and the actual engineering data, specifically including:

[0031] S41, inputting the wavelength and the box culvert length in the actual project into the relationship formula of the wavelength, the box culvert length and the wave transmission coefficient, and calculating the corresponding wave transmission coefficient;

[0032] S42, according to the marine meteorological data and the seabed topography conditions, through S1, the wave height conditions at the inlet of the water intake culvert are obtained;

[0033] S43, combining the wave height at the inlet of the water diversion box culvert obtained in S42 with the wave transmission coefficient calculated in S41, calculate the wave height at the outlet of the water diversion box culvert, and predict the wave height of the forebay of the pump house.

[0034] The present invention also provides a wave simulation system for a coastal power station pump house forebay, comprising:

[0035] Wave height condition simulation module: used to determine the wave height conditions at the entrance of the water intake culvert according to offshore marine meteorological data and seabed topography conditions, based on spectral theory and Boussinesq equation; the wave height conditions include: wave height, wave period and wavelength;

[0036] Wave transmission coefficient calculation module: used to calculate the wave transmission coefficient of the water diversion culvert under different wave height conditions through physical model tests;

[0037] Relationship establishment module: connected to the wave transmission coefficient calculation module, used to collect experimental data of physical model test and obtain the relationship between wavelength, box culvert length and wave transmission coefficient;

[0038] Pump house forebay wave height prediction module: connected with the wave height condition simulation module and the relationship formula establishment module, used to predict the wave height of the pump house forebay according to the marine meteorological data, the seabed topography conditions and the actual engineering data.

[0039] The embodiments of the present invention have the following technical effects:

[0040] 1. The wave height conditions at the entrance of the water intake culvert are calculated through spectrum theory and Boussinesq equation; the wave transmission coefficient of the water intake culvert under different wave height conditions is calculated through physical model tests, and the relationship between wavelength, culvert length and wave transmission coefficient is established; then the wave height of the pump house forebay can be predicted based on marine meteorological data, seabed terrain conditions and actual engineering data. The accuracy of wave prediction in the forebay of coastal power station pump houses is significantly improved through multi-step simulation methods.

[0041] 2. By accurately predicting the wave height of the pump house forebay, the design of the pump house and water diversion box culvert can be effectively optimized. Especially before the project is implemented, understanding the impact of wave characteristics on the design structure in advance can avoid unnecessary structural waste or unreasonable design, accurately control the fluctuation of the pump house forebay, and improve the operating safety of the coastal power plant.

[0042] 3. Accurate wave prediction not only helps to ensure the rationality of design and construction, but also ensures the durability and stability of facilities such as pump rooms and water diversion culverts in extreme marine environments, avoids safety hazards caused by wave action, thereby improving the sustainability of the entire power station system, reducing equipment damage and maintenance costs caused by wave effects, and improving economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0044] Figure 1 It is a flow chart of a wave simulation method for a coastal power station pump house forebay provided by an embodiment of the present invention;

[0045] Figure 2 It is a schematic diagram of a water diversion box culvert and a pump house forebay model provided by an embodiment of the present invention;

[0046] Figure 3 It is a schematic diagram of the correlation between wavelength / water diversion box culvert length and wave transmission coefficient provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0047] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0048] Figure 1 Flow chart of a wave simulation method for a coastal power station pump house forebay provided by an embodiment of the present invention. Figure 1 , including:

[0049] S1. According to offshore ocean meteorological data and seabed topography, based on spectral theory and Boussinesq equation, determine the wave height conditions at the inlet of the water intake culvert;

[0050] The wave height conditions include: wave height, wave period and wavelength.

[0051] In some embodiments, the S1 specifically includes:

[0052] S11. Collect offshore oceanographic meteorological data and seabed topographic conditions;

[0053] Marine meteorological data is the basis of wave simulation, including but not limited to: wind speed, wind direction, air pressure, temperature and tidal data; marine meteorological data and seabed topography data can be obtained through meteorological stations, satellite remote sensing, meteorological models, etc.

[0054] S12. According to offshore ocean meteorological data and seabed topography conditions, using spectrum theory, calculate offshore wave height conditions;

[0055] Commonly used spectral models include: Pierson-Moskowitz spectrum, which is suitable for relatively stable wind-generated waves and is usually used to describe the characteristics of wind waves in free sea areas; JONSWAP spectrum: suitable for waves generated under storms or more complex meteorological conditions, especially under strong wind conditions; select the spectral model according to the actual situation.

[0056] Wave height is an important characteristic of waves. Based on spectral theory, combined with marine meteorological data (such as wind speed, wind direction, air pressure, etc.) and spectral models, the wave energy density at different frequencies can be calculated. By integrating the spectrum, the total wave height obtained can be used to represent the wave height conditions in the open sea. Spectral theory can also calculate the period of waves. The wave period is usually calculated by the frequency distribution of the spectrum, especially the average wave period obtained by the center frequency of the spectrum or by the waveform data in the time domain. The wavelength is directly related to the wave height, wave period and water depth. The wavelength can be further calculated by the wave speed formula or by using spectral theory.

[0057] S13. According to the offshore wave height conditions, based on the Boussinesq equation, the wave height conditions at the water intake culvert entrance are calculated.

[0058] Based on the offshore wave height conditions obtained by spectral theory, the Boussinesq equation can be combined to further deduce the wave height conditions at the entrance of the water intake culvert. The Boussinesq equation is a set of equations that describe wave propagation and nonlinear effects. It can provide wave propagation, refraction, attenuation and other characteristics while considering the changes in seabed topography and water depth. This equation is usually used for wave simulation in shallow water areas. Based on the offshore wave height conditions, the Boussinesq equation is used to simulate the wave propagation path and calculate the wave conditions at the entrance of the water intake culvert, that is, to deduce the wave height, wave period, wavelength and other parameters at the water inlet and outlet.

[0059] Steps S11 to S13 can accurately calculate the wave height conditions at the water intake culvert entrance.

[0060] It is worth noting that the intake culvert is generally buried under the seabed, but a water intake head will extend from the end, and then the waves will be transmitted from the water intake head to the intake culvert. The water diversion culvert is located in front of the pump house, connecting the intake culvert and the pump house, and is responsible for guiding the water flow to the pump house, so generally only in the surge area this effect will be more obvious. The entrance of the water intake culvert here is actually a calculation point in the wave model. The intake culvert is not considered in the mathematical model, and its influence on the waves is not considered. Therefore, in the subsequent steps, the wave height at the entrance of the water intake culvert is the wave height at the entrance of the water diversion culvert.

[0061] S2. Through physical model tests, the wave transmission coefficient of the water diversion culvert under different wave height conditions is calculated, including:

[0062] S21. Determine the scale of the physical model and make the physical model according to the actual marine environment and structural dimensions;

[0063] S22, setting a wave generator to simulate different wave height conditions;

[0064] S23. Calculate the wave transmission coefficient by measuring the wave height data at the water diversion culvert inlet and outlet under different wave height conditions.

[0065] Furthermore, the wave transmission coefficient is defined as: the ratio of the wave height at the outlet of the water diversion box culvert to the wave height at the inlet of the water diversion box culvert, and the specific calculation formula is:

[0066] Kt=H T / H t ; In the formula, Kt represents the wave transmission coefficient; H T Indicates the wave height at the outlet of the water diversion culvert; H tIndicates the wave height at the inlet of the water diversion culvert.

[0067] For example, in the third phase expansion project of Cilatajak, Indonesia, in order to minimize the scale effect, according to the model design requirements, λ L =12 normal physical model, λ L It is a length scale, designed according to the principle of gravity similarity. Time scale: λ t =λ L 1 / 2 =3.46; wave height ratio: λ H =λ L =12; period scale: λ T =λ L 1 / 2 =3.46; weight scale: λ w =λ L 3 =1728.

[0068] The actual dimensions of the water diversion box culvert and the forebay of the pump house are: the bottom elevation of the forebay of the pump house is -10.5m, the length is 6.9m, and the width is 2.8m; the bottom elevation of the rectangular water diversion box culvert is -5m, the length is 31m, the width is 4m, and the height is 2.5m; the width of the water intake is 15m; the bottom elevation of the open channel is -4.5m, and the elevation of the open channel near the water intake is -6.5m; the slope ratio of the open channel and the land is 1:3. The model was made according to the actual dimensions and the scale, and the influence of waves on the water level change in the forebay of the pump house after entering the pump house through the water diversion box culvert was studied. Figure 2 It is a schematic diagram of a water diversion box culvert and a pump house forebay model provided in an embodiment of the present invention, the model includes a water intake, a revetment, a water diversion box culvert, and a pump house forebay, 4 wave height sensors (1#, 2#, 3#, 4#) are arranged in front of the water intake, and 4 wave height sensors (5#, 6#, 7#, 8#) are arranged in the pump house forebay; the bottom elevation of the pump house forebay is -0.875m, the length is 0.575m, and the width is 0.23m; the bottom elevation of the rectangular water diversion box culvert is -0.147m, the length is 2.58m, the width is 0.333m, and the height is 0.208m; the width of the water intake is 1.25m; the bottom elevation of the open channel is -0.375m, and the elevation of the open channel close to the water intake is -0.514m; the slope ratio of the open channel and the land is 1:3. By simulating different wave height conditions, conducting physical experimental models, obtaining wave height data at the inlet and outlet of the water diversion culvert under different wave height conditions, and calculating the wave transmission coefficient. The specific values ​​are shown in Table 1:

[0069] Table 1 Results of wave transmission coefficient Kt

[0070]

[0071] S3. Collect experimental data of physical model test and obtain the relationship between wavelength, culvert length and wave transmission coefficient, including:

[0072] Collect and pre-process the experimental data of wavelength, water diversion culvert length and wave transmission coefficient under all different wave height conditions through physical model tests;

[0073] Establish a curve relationship between wavelength (L), culvert length (Lp) and wave transmission coefficient (Kt), such as Figure 3 As shown, the horizontal axis represents the ratio of the box culvert length to the wavelength, and the vertical axis represents the wave transmission coefficient. The relationship between the wavelength, box culvert length and wave transmission coefficient is obtained by fitting, and the fitting relationship between the three parameters is obtained.

[0074] In some embodiments, the relationship between the wavelength, the culvert length and the wave transmission coefficient is:

[0075] ;

[0076] Where, L P represents the length of the box culvert; L represents the wavelength.

[0077] S4. Based on the marine meteorological data, seabed topographic conditions and actual engineering data, the wave height of the pump house forebay is predicted, including:

[0078] S41, inputting the wavelength and the box culvert length in the actual project into the relationship formula of the wavelength, the box culvert length and the wave transmission coefficient, and calculating the corresponding wave transmission coefficient;

[0079] S42, according to the marine meteorological data and the seabed topography conditions, through S1, the wave height conditions at the inlet of the water intake culvert are obtained;

[0080] S43, combining the wave height at the inlet of the water diversion box culvert obtained in S42 with the wave transmission coefficient calculated in S41, calculate the wave height at the outlet of the water diversion box culvert, and predict the wave height of the forebay of the pump house.

[0081] For example, when the period is 7s, the wavelength is 80m, and the culvert length is 100m, the wave transmission coefficient is about 0.017; calculated by step S1, the maximum H at the inlet of the water culvert is 1% The wave height is 0.89m in the WSW direction. It can be calculated that the wave height at the outlet of the water diversion box culvert is 0.015m. The wave height at the outlet of the water diversion box culvert is the wave height of the pool before the pump house. If it meets the relevant requirements and does not exceed 0.3m, the length of the water diversion box culvert does not need to be adjusted.

[0082] This application can analyze the wave conditions in the offshore and the wave height conditions at the entrance of the water intake culvert in detail by combining spectral theory and Boussinesq equation (step S1). By simulating different wave heights, wave periods, wavelengths and other conditions, and further considering the wave transmission characteristics of the water intake culvert (step S2), a more comprehensive understanding of the wave propagation characteristics under various wave conditions is provided. The relationship between the wavelength, culvert length and the wave transmission coefficient obtained by experimental data (step S3) enables designers to use these data more conveniently for engineering optimization in actual projects. Accurate calculation of the wave transmission coefficient helps to predict the wave characteristics of the pump house forebay, further reduce the impact of the wave transmission effect on the pump house equipment, and thus optimize the performance of the water flow introduction system. Combining actual marine meteorological data, seabed terrain conditions and engineering data can more accurately predict the wave height of the pump house forebay. This method is more practical than the existing technology that simply relies on theoretical models or past empirical data, and can better meet the actual engineering needs. Improve the simulation accuracy of the impact of offshore waves on the water intake culvert and predict the wave height of the pump house forebay. Furthermore, the fluctuation of the pump house front pool is accurately controlled, the operating safety of the coastal power plant is improved, the equipment damage and maintenance costs caused by wave influence are reduced, the economic benefits are improved, and the problems of inaccurate simulation of wave influence on the water diversion box culvert of the coastal power plant and insufficient control of fluctuations in the pump house front pool in the prior art are solved.

[0083] The present invention also provides a wave simulation system for a coastal power station pump house forebay, comprising:

[0084] Wave height condition simulation module: used to determine the wave height conditions at the entrance of the water intake culvert according to offshore marine meteorological data and seabed topography conditions, based on spectral theory and Boussinesq equation; the wave height conditions include: wave height, wave period and wavelength;

[0085] Wave transmission coefficient calculation module: used to calculate the wave transmission coefficient of the water diversion culvert under different wave height conditions through physical model tests;

[0086] Relationship establishment module: connected to the wave transmission coefficient calculation module, used to collect experimental data of physical model test and obtain the relationship between wavelength, box culvert length and wave transmission coefficient;

[0087] Pump house forebay wave height prediction module: connected with the wave height condition simulation module and the relationship formula establishment module, used to predict the wave height of the pump house forebay according to the marine meteorological data, the seabed topography conditions and the actual engineering data.

[0088] It should be noted that the terms used in the present invention are only for describing specific embodiments, rather than limiting the scope of the present application. As shown in the present specification, unless the context clearly indicates an exception, the words "one", "a", "a kind of" and / or "the" do not specifically refer to the singular, but may also include the plural. The terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that the process, method or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method or device. In the absence of more restrictions, the elements defined by the sentence "include one..." do not exclude the presence of other identical elements in the process, method or device including the elements.

[0089] It should also be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. Unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", etc. should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0090] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the technical solutions of the embodiments of the present invention.

Claims

1. A method for simulating waves in a forebay of a coastal power station pump house, characterized in that: The steps include: S1. According to offshore ocean meteorological data and seabed topography, based on spectral theory and Boussinesq equation, determine the wave height conditions at the inlet of the water intake culvert; The wave height conditions include: wave height, wave period and wavelength; S2. Calculate the wave transmission coefficient of the water diversion culvert under different wave height conditions through physical model tests; S3. Collect experimental data of the physical model test to obtain the relationship between wavelength, box culvert length and wave transmission coefficient. The relationship between wavelength, box culvert length and wave transmission coefficient is: ； Where Kt represents the wave transmission coefficient; L P represents the length of the box culvert; L represents the wavelength; S4. Predict the wave height of the pump house forebay based on marine meteorological data, seabed topographic conditions and actual engineering data; specifically include: S41, inputting the wavelength and the box culvert length in the actual project into the relationship formula of the wavelength, the box culvert length and the wave transmission coefficient, and calculating the corresponding wave transmission coefficient; S42, according to the marine meteorological data and the seabed topography conditions, through S1, the wave height conditions at the inlet of the water intake culvert are obtained; S43, combining the wave height condition at the water intake culvert inlet obtained in S42 with the wave transmission coefficient calculated in S41, calculate the wave height at the water intake culvert outlet, and predict the wave height of the pump house forebay.

2. A method for simulating waves in a coastal power station pump house forebay according to claim 1, characterized in that: The S1 specifically includes: S11. Collect offshore oceanographic meteorological data and seabed topographic conditions; S12. According to offshore ocean meteorological data and seabed topography conditions, using spectrum theory, calculate offshore wave height conditions; S13. According to the offshore wave height conditions, based on the Boussinesq equation, the wave height conditions at the water intake culvert entrance are calculated.

3. A method for simulating waves in a coastal power station pump house forebay according to claim 1, characterized in that: The S2 specifically includes: S21. Determine the scale of the physical model and make the physical model according to the actual marine environment and structural dimensions; S22, setting a wave generator to simulate different wave height conditions; S23. Calculate the wave transmission coefficient by measuring the wave height data at the water diversion culvert inlet and outlet under different wave height conditions.

4. A method for simulating waves in a coastal power station pump house forebay according to claim 2, characterized in that: The wave transmission coefficient is defined as: The specific calculation formula for the ratio of the wave height at the outlet of the water diversion box culvert to the wave height at the inlet of the water diversion box culvert is: Kt=H T / H t ; In the formula, Kt represents the wave transmission coefficient; H T Indicates the wave height at the outlet of the water diversion culvert; H t Indicates the wave height at the inlet of the water diversion culvert.

5. A method for simulating waves in a coastal power station pump house forebay according to claim 1, characterized in that: The S3 specifically includes: S31, collect the experimental data of wavelength, water diversion culvert length and wave transmission coefficient under all different wave height conditions obtained by physical model test and perform preprocessing; S32. Establish a curve relationship between wavelength, box culvert length and wave transmission coefficient, and obtain a relationship formula between wavelength, box culvert length and wave transmission coefficient by fitting.

6. A wave simulation system for a coastal power station pump house forebay, which implements a wave simulation method for a coastal power station pump house forebay as claimed in any one of claims 1 to 5, characterized in that: Includes the following modules: Wave height condition simulation module: used to determine the wave height conditions at the entrance of the water intake culvert according to offshore marine meteorological data and seabed topography conditions, based on spectral theory and Boussinesq equation; the wave height conditions include: wave height, wave period and wavelength; Wave transmission coefficient calculation module: used to calculate the wave transmission coefficient of the water diversion culvert under different wave height conditions through physical model tests; Relationship establishment module: connected to the wave transmission coefficient calculation module, used to collect experimental data of physical model test and obtain the relationship between wavelength, box culvert length and wave transmission coefficient; Pump house forebay wave height prediction module: connected with the wave height condition simulation module and the relationship formula establishment module, used to predict the wave height of the pump house forebay according to the marine meteorological data, the seabed topography conditions and the actual engineering data.

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