Method and platform for testing dynamic response characteristics of large marine equipment

Abstract

The invention provides a test method and platform for dynamic response characteristics of large-scale marine equipment, relates to the technical field of marine equipment tests, and aims to solve the technical problem that a test result does not accord with actual dynamic response characteristics. The test method comprises the following steps: providing test equipment, wherein the test equipment comprises a simulation piece, a wind wave flow generation unit, a water channel and a control device; descending the simulation piece to the bottom of the water channel, so that the top surface of the simulation piece is flush with the first bottom surface of the water channel; starting a wind wave flow generation unit, and guiding wind wave flow into the water channel; acquiring a first dynamic response of the simulation piece in the wind wave flow environment; moving the simulation piece to a first preset position of the water channel, and obtaining a second dynamic response of the simulation piece in the wind wave flow environment at the preset position; and the control device records and analyzes the first dynamic response and the second dynamic response in real time to obtain a test result. The test method is suitable for dynamic response characteristic research of large-scale marine equipment and accords with actual working conditions.

Description

Technical Field

[0001] The present invention relates to the technical field of marine equipment testing, and in particular to a testing method and platform for dynamic response characteristics of large marine equipment. Background Art

[0002] Ports and shipping, ships, water conservancy and hydropower, geology, ocean and other industries often need to conduct wave model tests. The waterway test system uses a wave-making system to create waves in the main body of the waterway. The digital wave height meter and digital pressure sensor accurately measure the wave height and pressure of the created waves, and the control device performs precise analog control.

[0003] In the related technology, the waterway test system is generally heavier because of the heavy physical model. For example, in the offshore structure test, when wind load and wave load act simultaneously, their combined effect is not a simple linear superposition. If the waterway test system cannot comprehensively consider this interaction, the dynamic response characteristics obtained in the test will not be consistent with the actual situation. Summary of the invention

[0004] The purpose of the present invention is to provide a test method and platform for the dynamic response characteristics of large-scale marine equipment, so as to solve the technical problem that the test results in waterway tests are inconsistent with the actual dynamic response characteristics.

[0005] In order to achieve the above object, the present invention provides the following technical solutions:

[0006] In a first aspect, the present invention provides a method for testing the dynamic response characteristics of large-scale marine equipment, comprising:

[0007] A test device is provided, the test device comprising a simulation part, a wind wave current generating unit, a waterway and a control device;

[0008] Moving the simulation member to the bottom of the water channel so that the top surface of the simulation member is flush with the first bottom surface of the water channel;

[0009] Starting a wind wave current generating unit to guide the wind wave current into the waterway; obtaining a first dynamic response of the simulation component in the wind wave current environment;

[0010] Moving the simulation member to a first preset position of the waterway, and obtaining a second dynamic response of the simulation member in the wind, wave and current environment at the preset position;

[0011] The control device records and analyzes the first dynamic response and the second dynamic response in real time to obtain a test result.

[0012] According to at least one embodiment of the present invention, before starting the wind wave current generating unit to guide the wind wave current into the waterway, the test method further includes:

[0013] Obtain the physical parameters of the wave field in the actual ocean environment;

[0014] The control device converts the analog signal into an electrical signal through the wind, wave and current generating unit according to the physical parameter to generate the wind, wave and current environment.

[0015] According to at least one embodiment of the present invention, obtaining physical parameters of a wave field in an actual ocean environment includes:

[0016] Obtaining the incoming wind speed and turbulent wind field of the actual ocean environment; and / or,

[0017] Obtaining the wave field spectrum and wave height of the actual ocean environment; and / or,

[0018] The water flow velocity of the actual ocean environment is obtained.

[0019] According to at least one embodiment of the present invention, the wind wave current generating unit comprises a wind tunnel, a fan and a turbulence generating device, and the test method comprises:

[0020] According to the incoming wind speed and turbulent wind field of the actual ocean environment, the fan in the wind tunnel is used to generate a uniform incoming wind field, and a turbulence generating device is used to disturb the incoming wind field to generate a target incoming wind field.

[0021] According to at least one embodiment of the present invention, the wind wave current generating unit includes a wave maker, and the test method includes:

[0022] According to the wave field spectrum and the wave height of the actual ocean environment, the wave making machine is used to drive the wave making plate to move so as to generate a target wave field.

[0023] According to at least one embodiment of the present invention, the wind wave current generating unit includes a current generator, and the test method includes:

[0024] According to the water flow velocity of the actual ocean environment, the flow generator is used to control the flow rate flowing through the waterway to generate a target flow velocity.

[0025] According to at least one embodiment of the present invention, the turbulence generating device comprises a spoiler blade or a comb plate.

[0026] According to at least one embodiment of the present invention, the test apparatus comprises a stabilization device comprising at least one first stabilization unit and at least one second stabilization unit;

[0027] After the simulation member is moved to a first preset position of the waterway, the test method comprises:

[0028] The first stabilizing unit is rotated in a direction close to the simulation member, and the first stabilizing unit cooperates with the second stabilizing unit to fix the simulation member at the first preset position.

[0029] According to at least one embodiment of the present invention, the number of the first stabilizing units is two, the number of the second stabilizing units is two, and each of the first stabilizing units and the corresponding second stabilizing unit are symmetrically arranged with respect to the simulation member.

[0030] In a second aspect, the present invention provides a test platform for conducting tests using the test method described in the first aspect.

[0031] Among the one or more technical solutions provided in the exemplary embodiments of the present invention, at least one of the following beneficial effects can be achieved.

[0032] The test equipment for wind and wave testing provided by the exemplary embodiment of the present invention includes a simulation member, a hoisting device, a wind and wave current generating unit and a waterway. The test method includes lowering the simulation member to the bottom of the waterway so that the top surface of the simulation member is flush with the first bottom surface of the waterway; starting the wind and wave current generating unit to guide the wind and wave current into the waterway; and obtaining a first dynamic response of the simulation member in a wind and wave current environment. Then, the simulation member is moved to a first preset position of the waterway, and a second dynamic response of the simulation member in a wind and wave current environment at the preset position is obtained. The first dynamic response and the second dynamic response are recorded and analyzed in real time by a control device to obtain corresponding test results.

[0033] Furthermore, before starting the wind, wave and current generating unit to direct the wind, wave and current into the waterway, it also includes obtaining the physical parameters of the wave field in the actual ocean environment; the control device converts the analog signal into an electrical signal through the wind, wave and current generating unit according to the physical parameters to generate a wind, wave and current environment.

[0034] Specifically, according to the incoming wind speed and turbulent wind field of the actual ocean environment, the fan in the wind tunnel is used to generate a uniform incoming wind field, and the turbulence generating device is used to disturb the incoming wind field to generate a target incoming wind field; according to the wave field spectrum and wave height of the actual ocean environment, a wave maker is used to drive the wave-making plate to move to generate a target wave field; according to the water flow velocity of the actual ocean environment, a flow maker is used to control the flow rate through the waterway to generate a target flow velocity.

[0035] Therefore, the test method provided by the exemplary embodiment of the present invention can perform dynamic response tests at different depths in a simulated sea condition environment in an actual wind field, wave field, and flow field, so as to obtain a dynamic response of the simulation component that is consistent with the actual situation. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The accompanying drawings illustrate exemplary embodiments of the present invention and together with the description serve to explain the principles of the present invention, and these drawings are included to provide a further understanding of the present invention and are incorporated in and constitute a part of this specification;

[0037] Figure 1 is a schematic diagram of a test method flow according to an embodiment of the present invention;

[0038] Figure 2 A schematic diagram of the axonometric structure of a test device according to an embodiment of the present invention;

[0039] Figure 3 A schematic diagram of an axonometric structure of a test device according to an embodiment of the present invention from another perspective;

[0040] Figure 4 is an axonometric structural schematic diagram of a waterway according to an embodiment of the present invention;

[0041] Figure 5 is an isometric structural schematic diagram of a first stabilizing unit according to an embodiment of the present invention;

[0042] Figure 6 is an isometric structural schematic diagram of a second stabilizing unit according to an embodiment of the present invention;

[0043] Figure 7 It is a schematic diagram of the front structural view of the second stabilizing unit and the lifting device according to an embodiment of the present invention.

[0044] Reference numerals:

[0045] 111. movable knife; 111a. first blade; 112. first hanging block; 121. fixed knife; 121a. second blade; 122. second hanging block; 13. telescopic device; 141. first limiting portion; 142. second limiting portion; 20. simulation part; 30. lifting device; 31. lifting rope; 321. first rotating portion; 322. second rotating portion; 41. first bottom surface; 411. second bottom surface; 42. wall panel; 421. recessed portion; 51. tilting plate; 61. first cover plate; 62. second cover plate; 63. third cover plate. DETAILED DESCRIPTION

[0046] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0047] Figure 1 Schematic diagram of the test method according to an embodiment of the present invention. Figure 1As shown, the test method for dynamic response characteristics of large marine equipment according to an exemplary embodiment of the present invention includes the following steps.

[0048] Step 101: Provide a test device, which includes a simulation component 20, a wind wave current generating unit, a waterway and a control device.

[0049] Specifically in the test equipment, Figure 4 Schematic diagram of the isometric structure of a waterway according to an embodiment of the present invention. Figure 4 As shown, in the test device of the exemplary embodiment of the present invention, the water channel has a first bottom surface 41 and two oppositely arranged wall panels 42, and the two wall panels 42 and the first bottom surface 41 are arranged in a U-shaped structure.

[0050] Step 102: Lower the simulation member 20 to the bottom of the waterway so that the top surface of the simulation member 20 is flush with the first bottom surface 41 of the waterway.

[0051] Step 103: Start the wind wave current generating unit to guide the wind wave current into the waterway; obtain the first dynamic response of the simulation component 20 in the wind wave current environment.

[0052] It should be noted that the simulation component 20 can be used to simulate a cross-sea bridge, an oil platform, an offshore wind power generation device, etc.

[0053] Specifically, water currents and wind waves flow from one end of the waterway to the other end (for the direction of wind and waves, see Figure 3 As shown by the hollow arrow in FIG. 4 , it can be understood that the simulation member 20 is located in the middle of the waterway. The width of the simulation member 20 is less than or equal to the distance between the two wall panels 42.

[0054] In some embodiments, the wind wave and current generating unit includes at least one of a wind tunnel, a wind machine, a turbulence generating device and a wave maker.

[0055] In some embodiments, the wind and wave testing system further includes at least one of an anemometer, a wave height meter, and a current meter.

[0056] Among them, the wind speed in the waterway can be simulated in a wind tunnel using a wind fan and a turbulence generating device, and the wind speed can be tested using an anemometer; the wave speed and wave height can be simulated in the waterway using a wave maker, and the wave height can be tested using a wave height meter; the water flow velocity can be simulated using a flow maker, and the water flow velocity can be tested using a flow meter.

[0057] Furthermore, the physical parameters of the wave field in the actual ocean environment are obtained; the control device converts the analog signal into an electrical signal through the wind, wave and current generating unit according to the physical parameters to generate a wind, wave and current environment.

[0058] Specifically, according to the incoming wind speed and turbulent wind field of the actual ocean environment, the fan in the wind tunnel is used to generate a uniform incoming wind field, and the turbulence generating device is used to disturb the incoming wind field to generate a target incoming wind field; according to the wave field spectrum and wave height of the actual ocean environment, a wave maker is used to drive the wave-making plate to move to generate a target wave field; according to the water flow velocity of the actual ocean environment, a flow maker is used to control the flow rate through the waterway to generate a target flow velocity.

[0059] The six-component force balance is installed on the simulation member 20 to test the six-component reaction force dynamic response of the simulation member 20. Exemplarily, one or more displacement sensors may be installed on the simulation member 20, and the dynamic displacement response of different parts of the simulation member 20 may be monitored by the displacement sensors.

[0060] In order to prevent the simulation part 20 from being damaged in a wind, wave and current environment, in the test equipment provided by the exemplary embodiment of the present invention, the simulation part 20 includes a flat plate on the top surface and a frame structure located below the flat plate, wherein the frame structure is a truss-type hollow structure formed by steel pipes, specifically, longitudinal and transverse beams are cross-welded, and the overall stiffness is strengthened by inclined pipes in the middle, which can not only simulate the object to be tested, but also maintain a certain stiffness, while reducing the weight, thereby reducing the experimental cost.

[0061] Step 103: Move the simulation member 20 to a first preset position of the waterway, and obtain a second dynamic response of the simulation member 20 in a wind, wave and current environment at the preset position.

[0062] In some embodiments, the connecting piece (sling, etc.) of the hoisting unit extends from the top of the waterway into the waterway and is connected to the simulation piece 20. In order to eliminate the influence of the connecting piece on the test, two recessed parts 421 are formed on the inner wall surface of the two wall panels 42 of the waterway, and the connecting piece is arranged in the corresponding recessed parts 421 to prevent the wind and wave flow from impacting the connecting piece. Therefore, the recessed part 421 has a notch formed on the inner wall of the wall panel 42, which makes the inner wall surface of the wall panel 42 of the waterway not smooth, which will affect the wind and wave flow. In order to avoid the influence of the notch on the wind and wave flow, a sealing plate is provided on the notch of each recessed part 421, so that the inner wall surface of the two wall panels 42 of the waterway reduces the influence on the wind and wave flow.

[0063] Exemplarily, a first card slot, a second card slot and a third card slot are respectively provided on the opposite wall surfaces of the recessed portion 421, and the first card slot, the second card slot and the third card slot are arranged in a direction away from the simulation part 20, and all extend in a vertical direction, the first card slot extends downward from the top of the recessed portion 421 to a first height of the recessed portion 421; the second card slot extends downward from the top of the recessed portion 421 to a second height of the recessed portion 421, and the third card slot extends downward from the top of the recessed portion 421 to a position near the bottom of the recessed portion 421.

[0064] The sealing plate includes a third cover plate 63, a first cover plate 61, and a second cover plate 62, wherein the two sides of the third cover plate 63 are fixedly arranged in the corresponding first slot; the two sides of the first cover plate 61 are slidably arranged in the corresponding second slot; and the two sides of the second cover plate 62 are slidably arranged in the corresponding third slot. Thus, the third cover plate 63 is fixedly arranged in the slot through the first slot and close to the top position of the recessed part 421; the first cover plate 61 is movably arranged in the slot through the second slot and can move in the interval from the top to the middle of the recessed part 421; the second cover plate 62 is movably arranged in the slot through the third slot and can move in the interval from the top to the bottom of the recessed part 421, and the bottom end of the second cover plate 62 can abut against the component (the first hanging block 112 or the second hanging block 122) connecting the simulation part 20 and the connecting part (sling).

[0065] In another optional embodiment, sliders are provided on both sides of the first cover plate 61 and the second cover plate 62, and the first cover plate 61 and the second cover plate 62 are respectively slidably disposed in the second slot and the third slot through rollers.

[0066] Exemplarily, the bottom end of the first cover plate 61 is further provided with a first hook portion facing the second cover plate 62; the top end of the second cover plate 62 is further provided with a second hook portion facing the first cover plate 61. The first cover plate 61 is attached to the third cover plate 63, and the bottom ends of the first cover plate 61 and the second cover plate 62 can be set on the corresponding first hanging block 112.

[0067] When the simulation member 20 rises, the hanging block will push the first cover plate 61 and the second cover plate 62 to move upward; when the simulation member 20 descends, the first cover plate 61 and the second cover plate 62 descend under the action of gravity. When the first cover plate 61 descends to the lowest position, the second cover plate 62 continues to descend until the second hook and the first hook overlap together, thereby preventing the second movable plate from detaching from the first movable plate.

[0068] Specifically, as the simulation member 20 rises, the simulation member 20 can drive the second cover plate 62 to move upward until it reaches the bottom end of the first cover plate 61, and then the simulation member 20 can simultaneously drive the first cover plate 61 and the second cover plate 62 to move upward to the bottom end of the third cover plate 63. When the simulation member 20 is at the highest position, the third cover plate 63, the first cover plate 61 and the second cover plate 62 in the sealing plate roughly overlap together, closing the groove of the recessed portion 421 above the clamping block of the simulation member 20.

[0069] When the simulation member 20 descends, the first cover plate 61 and the second cover plate 62 move downward under the action of gravity until they reach their respective maximum displacement limits. Figure 7 As shown in the distribution of the sealing plates, when the simulation part 20 is at the lowest position, the third cover plate 63, the first cover plate 61 and the second cover plate 62 in the sealing plate are arranged in sequence from top to bottom to close the notch of the recessed portion 421 above the hanging block of the simulation part 20.

[0070] Therefore, the sealing plate can close the notch of the recessed portion 421 when the simulation member 20 moves to any water depth, especially the notch that is more affected by wind and waves and is located at the portion corresponding to or above the simulation member 20, thereby ensuring the stability of the wind and wave environment.

[0071] Based on this, during the rise or fall of the simulation member 20, the portion of the notch of the recessed portion 421 located above the bottom of the simulation member 20 can be sealed by the third cover plate 63, the first cover plate 61, and the second cover plate 62, so that the inner wall surface of the wall plate 42 of the waterway forms a substantially complete wall surface, thereby preventing the damage of the wave shape and improving the accuracy of the experimental data. Furthermore, since the sealing plate does not require an additional power device to seal the notch of the recessed portion 421, the sealing is completed only by the synchronous rise of the simulation member 20 and the fall of its own gravity, which saves a lot of mechanical structures and reduces costs.

[0072] like Figure 2-Figure 7 As shown, the hoisting device 30 can hoist the simulation member 20 to different water depths, and lock the simulation member 20 at the preset height through the stabilizing device, so that experiments in wave, strong wind and ocean current environments can be carried out stably; after the experiment is completed, the height of the simulation member 20 can be further increased or lowered to test various performance indicators at the next preset height.

[0073] The hoisting device 30 includes two hoisting units, which are respectively arranged on both sides of the simulation member 20. The hoisting units are used to hoist the simulation member 20 to a preset height.

[0074] Exemplarily, the power of the lifting unit can be a crane, a gantry or a drive cylinder (electric / hydraulic / pneumatic) to provide vertical driving force. The drive cylinder in the above-mentioned power device is not easy to arrange when used for lifting the simulation component 20 in water, and it is difficult to operate for the simulation component 20 which is a large equipment. It is not easy for the crane and the gantry to fix and stabilize the position of the simulation component 20.

[0075] In some embodiments, the power of the hoisting unit may be a winch, and a winch is respectively arranged on the ground on both sides outside the waterway. The winch is a double-drum winch, which drags two slings 31 respectively, and the two slings 31 pass through the wall plate 42 of the waterway and are connected to one side of the simulation member 20. The double-drum winch can ensure the synchronous hoisting of one side of the simulation member 20. The double-drum winches of the two hoisting units both use servo drive motors, which ensures the synchronous hoisting of the two winches, that is, it can ensure the synchronous hoisting of both sides of the simulation member 20, and the hoisting process is relatively stable.

[0076] In order to make the sling 31 be in a vertical state when connected to the simulation part 20, that is, inside the waterway, recessed portions 421 are respectively provided at positions corresponding to the sling 31 on the wall panels 42 of the waterway, and the recessed portions 421 are formed by protrusions of the wall panels 42 toward the outside of the waterway, wherein the first rotating portion 321 uses the outer wall surface of the groove bottom of the recessed portion 421 as a fulcrum, and the second rotating portion 322 uses the inner wall surface of the groove bottom of the recessed portion 421 as a fulcrum, and the entire second rotating portion 322 and the bracket as well as the corresponding part of the sling 31 are all located in the recessed portion 421, that is, there is no protrusion on the inner wall surface of the wall panel 42 of the waterway, so that the simulation part 20 can move to the corresponding height without hindrance.

[0077] Furthermore, the setting of the recessed portion 421 ensures that the sling 31 and the second rotating portion 322 do not affect the wind and wave test area in the waterway.

[0078] The hoisting method of arranging winches on both sides of the waterway, and the pulleys and slings 31 arranged in the recessed part 421, has fewer parts and occupies less internal space of the waterway, which is more suitable for the arrangement of the simulation part 20 and will not damage the water flow environment in the waterway; the hoisting method of using winches and slings 31 is applicable to both large and small simulation parts. At the same time, compared with cranes and trusses, it does not occupy too much height space, is more friendly to the construction of experimental plants, and has lower costs.

[0079] like Figure 2-Figure 4 As shown, there are four recessed portions 421 , and the recessed portions 421 on different wall panels 42 are symmetrically arranged in pairs, and the ends of the two slings 31 of the same winch are both connected to the side of the simulation member 20 .

[0080] like Figure 2-Figure 4 As shown, in the device of the exemplary embodiment of the present invention, at the top position where the sling 31 passes through the recessed part 421, the first rotating part 321 is arranged on the outside and the second rotating part 322 is arranged on the inside, wherein the sling 31 of the second rotating part 322 arranged on the inside is vertically arranged on the simulation part 20, so as to ensure the stability of the lifting. It can be understood that the first rotating part 321 and the second rotating part 322 both use the wall surface of the recessed part 421 as a fulcrum, and the sling 31 from the winch passes through the guidance of the first rotating part 321 and the second rotating part 322 to enter the waterway, and is connected to the side of the simulation part 20.

[0081] It should be noted that, in order to ensure the stability of the simulation component 20 during the lifting process, the slings 31 located on both sides of the waterway are symmetrically arranged with respect to the simulation component 20 .

[0082] Considering the hoisting method using a winch and a sling 31, it is difficult for a large simulation member 20 to remain stable under the impact of wind and waves. Figure 5-Figure 7As shown, the stabilizing device in the apparatus of the exemplary embodiment of the present invention includes at least one first stabilizing unit and at least one second stabilizing unit, and the first stabilizing unit and the second stabilizing unit are respectively arranged on both sides of the simulation member 20.

[0083] The number of the first stabilizing units and the number of the second stabilizing units can be determined according to actual needs. Considering the stability during the hoisting process, the number of the first stabilizing units is two, and the two first stabilizing units are respectively arranged at positions close to the ends of the simulation member 20. The number of the second stabilizing units is two, and the two second stabilizing units are respectively arranged at positions close to the ends of the simulation member 20.

[0084] In some embodiments, the first stabilizing unit and the second stabilizing unit are symmetrically arranged about the simulation member 20. Specifically, a portion of the first stabilizing unit and a portion of the second stabilizing unit are both located in the corresponding recessed portion 421. The first stabilizing unit and the second stabilizing unit cooperate with each other to stabilize the simulation member 20 at different water depths in the waterway.

[0085] like Figure 4 As shown, the first bottom surface 41 of the waterway forms a second bottom surface 411 on the incoming flow side of the simulation member 20. When the simulation member 20 is located at the maximum water depth of the waterway, illustratively, the hinge between the tilting plate 51 and the simulation member 20 is close to the top surface of the simulation member 20. The top surface of the tilting plate 51 and the top surface of the simulation member 20 are on the same horizontal plane, and the bottom surface of the tilting plate 51 is attached to the second bottom surface 411 of the first bottom surface 41 of the waterway.

[0086] It can be understood that a cavity for containing the simulation member 20 is also provided in the area of ​​the waterway near the four recessed portions 421, and the cavity, the second bottom surface 411 and the first bottom surface 41 form a two-step step, so that when the simulation member 20 is located in the cavity (the maximum water depth of the simulation member 20), the top surface of the simulation member 20, the top surface of the tilting plate 51 and the first bottom surface 41 are on the same horizontal plane.

[0087] like Figure 3 As shown, the guide device of the exemplary embodiment of the present invention includes a tilting plate 51 hinged at the inflow end of the simulation member 20 , and the hinge position between the tilting plate 51 and the simulation member 20 is located at the top position of the simulation member 20 .

[0088] Exemplarily, the tilting plate 51 is a plate with a smooth surface; the width of the tilting plate 51 is the same as the width of the simulation member 20 , and the length of the tilting plate 51 is substantially the same as the length of the simulation member 20 .

[0089] In some embodiments, the bottom of the tilting plate 51 also has a frame structure, which is a steel pipe welded structure. The steel pipe welded structure is a truss-type hollow structure, which is welded vertically and horizontally, and this structure can ensure the overall rigidity of the tilting plate 51 and prevent deformation under the impact of wind and waves, thereby reducing the diversion effect.

[0090] In some embodiments, the free end of the tilting plate 51 can slide on the second bottom surface 411. As the simulation member 20 rises, an angle is formed between the tilting plate 51 and the simulation member 20, and the free end of the tilting plate 51 gradually moves toward the simulation member 20. When wind and waves impact the side from the incoming flow direction, the wind and waves transition to the top surface of the simulation member 20 through the slope of the tilting plate 51, which can prevent the wind and waves from directly hitting the side of the simulation member 20 and causing wave damage.

[0091] In some embodiments, the test equipment further includes running wheels disposed at one end of the frame structure away from the simulation member 20; the tilting plate 51 is slidably disposed on the first bottom surface 41 of the waterway through the running wheels. The number of running wheels disposed at the free end of the tilting plate 51 can be adjusted according to actual needs, and the arrangement of the running wheels can enable the tilting plate to move smoothly on the second bottom surface 411.

[0092] Considering the height difference between the second bottom surface 411 and the first bottom surface 41 of the water channel, when the free end of the inclined plate 51 moves toward the simulation part 20 along the surface of the second bottom surface 411, the water flow on the first bottom surface 41 will directly impact the free end of the inclined plate 51 and form a vortex between the inclined plate 51 and the step surface.

[0093] The test equipment of the exemplary embodiment of the present invention further comprises a transition plate hinged to the first bottom surface 41 of the water channel. The width of the transition plate is consistent with the width of the tilting plate 51, and the length is determined according to actual conditions.

[0094] One end of the transition plate is hinged at a position where the first bottom surface 41 and the second bottom surface 411 of the waterway are adjacent, and the transition plate is hinged on the first bottom surface 41 through a movable hinge, wherein a connecting plate of the movable hinge is fixed on the first bottom surface 41 of the waterway, and another connecting plate is welded to the transition plate.

[0095] The transition plate has a sufficient length, and the free end of the transition plate is always overlapped on the top surface of the tilting plate 51. When the tilting plate 51 is tilted and displaced as the simulation member 20 rises, the transition plate overlapped on the tilting plate 51 can form a smooth transition between the first bottom surface 41 of the waterway and the free end of the tilting plate 51, thereby minimizing the damage to the wave shape and ensuring the consistency and validity of the experimental data.

[0096] Since there is a relative movement process between the transition plate and the tilting plate 51, in order to make the process transition smoothly, a first roller is set at the bottom of the free end of the transition plate. Optionally, one or more second rollers are set in the middle part of the bottom of the transition plate. Even if the transition plate has a sufficient length, no matter at any position, the overlapping movement process between the transition plate and the tilting plate 51 can be completed by the rolling friction of the first roller and the second roller.

[0097] Exemplarily, the first stabilizing unit includes a first hanging block 112 , and the second stabilizing unit includes a second hanging block 122 . The first hanging block 112 and the second hanging block 122 have the same structure.

[0098] In order to make the simulation part 20 fit closely with the wall plate 42 of the waterway as much as possible and maintain the accuracy of the experimental data, two first hanging blocks 112 and two second hanging blocks 122 are respectively provided on both sides of the simulation part 20 .

[0099] For example, two first hanging blocks 112 are disposed on the first side of the simulation member 20 and are located near the bottom of the simulation member 20; two second hanging blocks 122 are disposed on the second side of the simulation member 20 and are located near the bottom of the simulation member 20. The four hanging blocks are respectively protruded from the side of the simulation member 20, wherein at least a portion of the hanging blocks is located in the corresponding recessed portion 421.

[0100] For example, two ear plates are arranged on the top surface of each hanging block, a pin is arranged between the two ear plates, and the sling 31 is sleeved on the pin to form a connection with the hanging block.

[0101] Exemplarily, a first groove is provided on the side of each first hanging block 112 facing away from the simulation member 20, and the first groove extends along the vertical direction to the top and bottom surfaces of the first hanging block 112; a second groove is provided on the side of each second hanging block 122 facing away from the simulation member 20, and the second groove extends along the vertical direction to the top and bottom surfaces of the second hanging block 122.

[0102] For example, the first groove and the second groove are both wedge-shaped grooves, and the cross-section of the first groove decreases in size along the direction close to the simulation member 20, that is, the first groove is in an expanding structure along the direction away from the simulation member 20; the second groove is also in an expanding structure in the direction away from the simulation member 20. Exemplarily, the cross-sections of the first groove and the second groove are both isosceles trapezoids and right-angled trapezoids. When the cross-sections of the first groove and the second groove are both isosceles trapezoids, the hoisting process of the simulation member 20 is smoother and the positioning is more accurate.

[0103] The first stabilizing unit also includes a movable knife 111 cooperating with the first hanging block 112, one end of the movable knife 111 is hinged on the ground and extends along the vertical direction; the second stabilizing unit also includes a fixed knife 121 cooperating with the second hanging block 122, one end of the fixed knife 121 is fixed on the ground and extends along the vertical direction.

[0104] In actual application, one end of the movable knife 111 is hinged at the bottom of the waterway and is located in the corresponding recessed portion 421; one end of the fixed knife 121 is fixed at the bottom of the waterway and is located in the corresponding recessed portion 421. The movable knife 111 and the fixed knife 121 extend along the height direction of the recessed portion 421 to a position near the top of the waterway. A linear motion structure, such as a hydraulic cylinder, a cylinder or a telescopic device 13, is also provided near the top of the recessed portion 421 where the movable knife 111 is located. The telescopic device 13 is used as an example for explanation below. The telescopic end of the telescopic device 13 is hinged to the top of the movable knife 111 and moves along the direction of the wall panel 42 perpendicular to the waterway.

[0105] When the simulation part 20 reaches the preset height position driven by the lifting device 30, the telescopic end of the telescopic device 13 extends, pushing the top of the movable knife 111 to move toward the inside of the waterway, and the middle part of the movable knife 111 is gradually pressed against the first groove of the first lifting block 112, and the second groove of the second lifting block 122 is also pressed against the middle part of the fixed knife 121. Based on this, a part of the movable knife 111 is embedded in the first groove, and a part of the fixed knife 121 is embedded in the second groove, so that the corresponding movable knife 111 and the fixed knife 121 cooperate to clamp the simulation part 20 from both sides, maintain its stability and bear lateral loads, such as Figure 3 The force shown is from the side impact of wind and waves.

[0106] When the simulation member 20 needs to change the water depth in the waterway, the telescopic end of the telescopic device 13 shortens, driving the top of the movable blade 111 to move outward from the waterway, the pressing force of the movable blade 111 in the first groove decreases, the pressing force of the fixed blade 121 in the second groove also decreases, and the movable blade 111 and the fixed blade 121 lose their grip on the simulation member 20. At this time, the hoisting device 30 can drive the simulation member 20 to rise or fall to the corresponding water depth.

[0107] Exemplarily, the movable knife 111 and the fixed knife 121 are plates of uniform thickness. Optionally, the movable knife 111 also has a first blade portion 111a that cooperates with the first groove, and the fixed knife 121 has a second blade portion 121a that cooperates with the second groove, wherein the shape of the first blade portion 111a matches the first groove, and its cross-section is an isosceles trapezoid; the shape of the second blade portion 121a matches the second groove, and its cross-section is also an isosceles trapezoid.

[0108] In some embodiments, when the telescopic end of the telescopic device 13 is fully retracted, the first blade 111a of the movable knife 111 is still within the first groove of the first hanging block 112, that is, the movable knife 111 and the first groove are not completely disengaged; the second blade 121a of the fixed knife 121 is still within the second groove of the second hanging block 122, that is, the fixed knife 121 and the second groove are not completely disengaged. Therefore, when the simulation member 20 needs to change the water depth in the waterway, driven by the lifting device 30, the simulation member 20 will still move along the movable knife 111 and the fixed knife 121. At this time, the movable knife 111 and the fixed knife 121 are used to guide the simulation member 20, avoiding the simulation member 20 from vigorous shaking due to the flexibility of the sling 31, preventing the heavy-loaded simulation member 20 from damaging the waterway and related equipment, and improving the safety of the experiment.

[0109] Considering that the movable knife 111 is a movable plate and is a long strip plate, for example, its length can be 3m to 5m, or longer, and in order to install the second rotating part 322 and the sling 31 and other auxiliary parts, the width of the recessed part 421 of the waterway is much greater than the thickness of the movable knife 111, therefore, the recessed part 421 of the waterway cannot limit the movable movable knife 111, and the movable knife 111 may be misaligned during the activity due to its own rigidity. Therefore, a guide device is also provided in the recessed part 421 where the movable knife 111 is located, and the guide device includes a first guide unit provided on one groove wall of the recessed part 421 and a second guide unit provided on another groove wall, and a movable space for the movable knife 111 to move is formed between the first guide unit and the second guide unit, so as to maintain the moving accuracy of the movable knife 111 and avoid deviation.

[0110] Furthermore, the first guide unit and the second guide unit are arranged on the two sides of the movable blade 111, ensuring that the rotation direction of the movable blade 111 is always perpendicular to the vertical direction. When the simulation member 20 is locked by the stabilizing device, the cooperation of the first guide unit and the second guide unit with the movable blade 111, and the fixed arrangement of the fixed blade 121 at the bottom of the waterway can bear the impact force of wind and waves from the side (such as Figure 3 As a result, the simulation member 20 of the exemplary embodiment of the present invention does not tilt or shake under the impact of wind and waves, and remains stable to ensure the accuracy of the test data.

[0111] Exemplarily, the first guide unit is located on the outer side of the movable knife 111 (the side where the two movable knives 111 face away from each other), and the second guide unit is located on the inner side of the movable knife 111 .

[0112] For example, the first guide unit is composed of multiple first limiting portions 141 arranged on the groove wall of the recessed portion 421, wherein the axial direction of the first limiting portion 141 is perpendicular to the movable knife 111, and the multiple first limiting portions 141 are evenly arranged along the height direction of the groove wall of the recessed portion 421.

[0113] The second guide unit is composed of a plurality of second limiting portions 142 arranged on another groove wall of the recessed portion 421 , wherein the axial direction of the second limiting portion 142 is parallel to the movable knife 111 , and the plurality of second limiting portions 142 are evenly arranged along the height direction of the groove wall of the recessed portion 421 .

[0114] In some embodiments, the first limiting portion 141 and the second limiting portion 142 correspond to each other one by one, and the corresponding first limiting portion 141 and the second limiting portion 142 are located at the same position in the height direction of the recessed portion 421 .

[0115] It should be noted that the axial direction of the first limiting portion 141 is set to be perpendicular to the movable knife 111. According to the movable space required by the movable knife 111, the axial length of the first limiting portion 141 can be conveniently cut to maintain a certain distance between the first limiting portion 141 and the second limiting portion 142. When the axial directions of the first limiting portion 141 and the second limiting portion 142 are parallel to the movable knife 111, the distance between the first limiting portion 141 and the second limiting portion 142 may be too large to cause the movable knife 111 to shake in the incoming flow direction, and the simulation part 20 cannot be stabilized, thereby causing inaccurate experimental data. Exemplarily, the first limiting portion 141 and the second limiting portion 142 can be steel pipes.

[0116] Step 105: The control device records and analyzes the first dynamic response and the second dynamic response in real time to obtain a test result.

[0117] Specifically, the control device can be a PLC or a computer system and a controller, etc. The control device is used to record the first dynamic response and the second dynamic response measured in step 103 and step 104 respectively, so that the dynamic response of the simulation component 20 in the wind field, flow field and wave field under different water depth conditions can be analyzed.

[0118] In some implementations, step 104 may be repeatedly performed to obtain dynamic responses of the simulation component 20 in the simulation environment at more than two first preset positions.

[0119] From the above, it can be seen that the test method provided by the exemplary embodiment of the present invention can simultaneously generate wind loads, wave loads and current loads in a waterway, and the combined effects of the above loads can be used to obtain the dynamic response characteristics of simulation components at different depths through a control device in accordance with actual sea conditions, thereby providing a reference for the design of offshore structures.

[0120] It should be understood by those skilled in the art that the above embodiments are only for the purpose of clearly illustrating the present invention, and are not intended to limit the scope of the present invention. For those skilled in the art, other changes or modifications may be made based on the above disclosure, and these changes or modifications are still within the scope of the present invention.

Claims

1. A test method for dynamic response characteristics of large marine equipment, characterized in that: include: A test device is provided, the test device comprising a simulation part, a wind wave current generating unit, a waterway and a control device; Moving the simulation member to the bottom of the water channel so that the top surface of the simulation member is flush with the first bottom surface of the water channel; Starting the wind wave current generating unit to guide the wind wave current into the waterway; Acquire a first dynamic response of the simulation component in the wind, wave and current environment; Moving the simulation member to a first preset position of the waterway, and obtaining a second dynamic response of the simulation member in the wind, wave and current environment at the preset position; The control device records and analyzes the first dynamic response and the second dynamic response in real time to obtain a test result.

2. The test method according to claim 1, characterized in that Before starting the wind wave current generating unit to guide the wind wave current into the waterway, the test method further includes: Obtain the physical parameters of the wave field in the actual ocean environment; The control device converts the analog signal into an electrical signal through the wind, wave and current generating unit according to the physical parameter to generate the wind, wave and current environment.

3. The test method according to claim 2, characterized in that Obtain the physical parameters of the wave field in the actual ocean environment, including: Obtaining the incoming wind speed and turbulent wind field of the actual ocean environment; and / or, Obtaining the wave field spectrum and wave height of the actual ocean environment; and / or, The water flow velocity of the actual ocean environment is obtained.

4. The test method according to claim 3, characterized in that: The wind wave flow generating unit comprises a wind tunnel, a fan and a turbulence generating device, and the test method comprises: According to the incoming wind speed and turbulent wind field of the actual ocean environment, the fan in the wind tunnel is used to generate a uniform incoming wind field, and a turbulence generating device is used to disturb the incoming wind field to generate a target incoming wind field.

5. The test method according to claim 3, characterized in that: The wind wave current generating unit includes a wave maker, and the test method includes: According to the wave field spectrum and the wave height of the actual ocean environment, the wave making machine is used to drive the wave making plate to move so as to generate a target wave field.

6. The test method according to claim 3, characterized in that: The wind wave current generating unit includes a current generator, and the test method includes: According to the water flow velocity of the actual ocean environment, the flow generator is used to control the flow rate flowing through the waterway to generate a target flow velocity.

7. The test method according to claim 4, characterized in that: The turbulence generating device comprises a spoiler blade or a comb plate.

8. The test method according to any one of claims 1 to 7, characterized in that: The test apparatus comprises a stabilization device, the stabilization device comprising at least one first stabilization unit and at least one second stabilization unit; After the simulation member is moved to a first preset position of the waterway, the test method comprises: The first stabilizing unit is rotated in a direction close to the simulation member, and the first stabilizing unit cooperates with the second stabilizing unit to fix the simulation member at the first preset position.

9. The test method according to claim 8, characterized in that The number of the first stabilizing units is two, the number of the second stabilizing units is two, and each of the first stabilizing units and the corresponding second stabilizing unit are symmetrically arranged with respect to the simulation member.

10. A test platform, characterized in that: The test is carried out using the test method described in any one of claims 1 to 9.

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