A field test method for breaking ice with high-pressure air gun bubbles

Abstract

The present invention is a high-pressure airgun bubble icebreaking field test method. The present invention relates to the field of polar ship and marine engineering technology. The present invention selects a test site; installs bubble generating equipment, inserts the high-pressure airgun bubble generating device into the ice hole and fixes it; arranges an observation system, records test images and data; prepares for the test, uses a long-distance power line to connect the controller power supply, and guides the on-site personnel to a safe area; detonates, turns on the safety controller, and the high-pressure gas generated by the expansion rapidly expands underwater to form underwater bubbles, and destroys the ice layer; and finally collects data.

Description

Technical Field

[0001] The invention relates to the technical field of polar ships and marine engineering, and is an outdoor test method for high-pressure air gun bubble ice breaking. Background Art

[0002] In recent years, the coverage and thickness of Arctic sea ice have continued to shrink, polar navigation and resource development have become increasingly realistic, and the huge economic benefits have prompted the international ship market to have an increasingly urgent demand for professional icebreakers, various polar transport ships and projects. Traditional icebreaking methods mainly rely on hull structure collision to break ice, which is risky and inefficient. As a new auxiliary icebreaking method, high-pressure bubble icebreaking technology has the advantages of high efficiency, cleanliness and strong directionality, and is currently receiving attention from scholars at home and abroad.

[0003] Traditional bubble-assisted icebreaking uses a compression system to eject air from holes in the underwater part of the hull to generate bubbles, which are then used to push away the broken ice around the hull, reducing the friction between the hull and the broken ice, thereby effectively reducing the ice-clearing resistance, i.e., friction resistance, during navigation in the broken ice zone. In recent years, the concept of using underwater high-pressure bubbles to break ice has also been proposed. Researchers have begun to use electric sparks, underwater explosions, etc. as high-pressure bubble sources to generate bubbles under the ice, and use high-pressure bubble loads to destroy ice layers or floating ice. However, electric spark bubbles are usually used for mechanism experiments, and the control of underwater explosion bubbles is relatively complicated. Therefore, seeking a safe, controllable, and practical high-pressure bubble icebreaking method is also a hot topic at the forefront.

[0004] Focusing on the above problems, based on the previous research, an underwater high-pressure airgun bubble icebreaking method was further proposed. Compressed air is quickly released under the ice through a high-pressure airgun to form underwater high-pressure airgun bubbles. The impact load generated by the underwater high-pressure bubbles is used to destroy the ice layer or large pieces of floating ice. Unlike traditional bubble-assisted icebreaking, which aims to reduce friction resistance, this method can effectively reduce the icebreaking resistance when sailing in ice areas, and has the advantages of strong directionality, small additional damage, and clean and environmental protection. At the same time, this method has the potential for engineering application. For example, when a polar ship is trapped in an ice accident while sailing in an ice area, this technology can be used for rescue operations. In addition, this technology can also be applied in engineering fields such as ice removal in northern winter.

[0005] In the existing related research, the invention patents of patent numbers CN109882601B, CN109900177B, CN109946298B, etc. mainly introduce the methods and experimental equipment of laboratory-scale mechanism experiments of high-pressure airgun bubble icebreaking. This experimental method is an outdoor experimental method of high-pressure airgun bubble icebreaking, which is an experimental method for large-scale high-pressure bubble icebreaking in inland rivers or sea areas, and can provide theoretical support and practical methods for subsequent real-ship icebreaking voyages in polar areas. Summary of the invention

[0006] The present invention is to fill the gap in the existing high-pressure airgun bubble ice-breaking field test. The method of the present invention is relatively simple in form and easy to be executed in the field environment, while ensuring safety and complete data collection. Based on this, the present invention proposes a high-pressure airgun bubble ice-breaking field test method.

[0007] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0008] The present invention provides a high-pressure air gun bubble ice breaking field test method, and the present invention provides the following technical solutions:

[0009] A high-pressure airgun bubble ice-breaking field test method, the method comprising the following steps:

[0010] Step 1: Select the test site;

[0011] Step 2: Install the bubble generating equipment, insert the high pressure air gun bubble generating device into the ice hole and fix it;

[0012] Step 3: Arrange the observation system and record the test images and data;

[0013] Step 4: Test preparation, use a long-distance power cable to connect the controller power supply, and guide the on-site personnel to a safe area;

[0014] Step 5: Detonation, opening the safety controller, the high-pressure gas generated by the expansion rapidly expands underwater to form underwater bubbles and destroy the ice layer;

[0015] Step 6: Collect data.

[0016] Preferably, the step 1 is specifically:

[0017] Field tests need to take into account water flow and ice conditions. A site that can meet the test requirements should be selected based on the thickness of river ice or sea ice in historical years and the breadth of the test area. A test site that can meet the required temperature should be selected based on on-site ice thickness measurements and weather forecasts.

[0018] Preferably, the step 2 is specifically:

[0019] Compress the liquid carbon dioxide into a cylindrical gun body structure through a high-pressure pump, install the excitation device in advance, and seal the high-pressure bubble gun to complete the test gas source preparation work, and carry the high-pressure air gun bubble generating device filled with liquid carbon dioxide, the safety controller and the power cord to the test site;

[0020] According to the ice thickness conditions required for the test, the air gun bubble explosion center position should be selected, and an ice core drill should be used to drill a hole at the explosion center position; according to the explosion distance required for the test, the air gun fixture should be adjusted to ensure that the air gun tip, i.e. the air gun bubble release position, is at the required underwater depth; the air gun tip is placed underwater, and the high-pressure air gun bubble generating device is inserted into the ice hole and fixed.

[0021] Preferably, the step 3 is specifically:

[0022] At a certain distance from the explosion center, underwater pressure sensors are deployed to measure the changes in flow field pressure during the evolution of the airgun bubble;

[0023] The pressure sensor uses PCB138 series underwater explosion sensor. The sensors are all installed vertically and use counterweights to ensure the working posture of the sensor.

[0024] An underwater camera was deployed slightly away from the explosion center to measure the morphological changes of the airgun bubble during its evolution.

[0025] At a greater distance, a high-speed camera was placed to capture the splashing of ice and the deformation of the water surface during the icebreaking process;

[0026] A drone was used to shoot the test process from above and record the response changes of the ice surface under the action of high-pressure air gun bubbles. In addition, a Sony FDR-AXP55 camera and a Nikon D7200 camera were used for auxiliary shooting and recording to ensure that the test image data was comprehensive and detailed.

[0027] Preferably, the airgun body is placed in a floating structure or an underwater unmanned boat, so that the airgun can perform a fixed-point icebreaking operation at a predetermined depth underwater.

[0028] Preferably, the step 5 is specifically:

[0029] The observer turns on the observation system, the blaster gives the detonation order and turns on the safety controller; when the microcurrent passes through the excitation device, high temperature is generated, which instantly vaporizes the liquid carbon dioxide. The high-pressure gas generated by the expansion will break through the sealing device and quickly spray outward from the air gun tip. The high-pressure gas generated by the expansion quickly expands underwater to form underwater bubbles and destroy the ice layer.

[0030] Preferably, after the high pressure gas underwater pulsation ends, the observation data is saved and the observation system is turned off. The field test air gun bubble, pressure sensor, and underwater camera equipment are salvaged.

[0031] A high-pressure air gun bubble field test generating device, the device comprising: a fixed air gun fixture, a movable air gun fixture, a counterweight, a gun body CO2, an air gun muzzle, and a high-pressure air gun bubble generating device;

[0032] The cavity of the high-pressure air gun bubble generating device is filled with gun body CO2, the upper end of the high-pressure air gun bubble generating device is clamped by a fixed air gun clamp, the air gun mouth of the high-pressure air gun bubble generating device is inserted into the ice surface, the movable air gun clamp clamps the high-pressure air gun bubble generating device on the ice surface, the counterweight is fixed on the ice surface, and the two ends of the fixed air gun clamp and the movable air gun clamp are connected by ropes to fix them.

[0033] A computer-readable storage medium stores a computer program, which is executed by a processor to implement a high-pressure air gun bubble ice-breaking field test method.

[0034] A computer device comprises a memory and a processor, wherein the memory stores a computer program, and when the processor executes the computer program, a high-pressure air gun bubble ice-breaking field test method is implemented.

[0035] The present invention has the following beneficial effects:

[0036] Compared with the prior art, the present invention has the following advantages:

[0037] The present invention provides a clear idea for high-pressure bubble field test. In previous experiments on bubble damage to targets, most of the bubbles used were laboratory-scale bubbles with low pressure and small gas volume, which can only be used for mechanistic analysis. The high-pressure bubble field test method described in the present invention is applied to engineering-scale research. Since the high-pressure gas used has high pressure and large gas volume, the destructive effect is extremely large. Therefore, a good high-pressure bubble icebreaking field test method can be used to avoid injuries. In addition, the cost of conducting field tests is extremely expensive, so the collection of field test data is particularly important. The use of reasonable experimental steps and test site layout can collect good experimental data and ensure its accuracy.

[0038] The present invention provides a high-pressure air gun bubble ice-breaking field test method and test process, which provides a powerful method reference for ice-breaking and buoyancy of underwater rotating bodies in extreme polar environments, and provides a method reference for dynamic response analysis of ice bodies under transient strong impact loads. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] 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.

[0040] Figure 1 Select a schematic diagram for the experimental site;

[0041] Figure 2 This is a schematic diagram of the high-pressure airgun bubble field test generating device;

[0042] Figure 3 The figure is a side view schematic diagram of the device deployment;

[0043] Figure 4 It is a top view diagram of the device layout;

[0044] Figure 5 A top-down view of the device

[0045] Figure 6 This is a schematic diagram of the high-pressure airgun bubble field test generating device;

[0046] Figure 7 This is a diagram of the observation equipment. DETAILED DESCRIPTION

[0047] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. 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 are within the scope of protection of the present invention.

[0048] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", 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 limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0049] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0050] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0051] The present invention is described in detail below in conjunction with specific embodiments. Specific embodiment one:

[0053] according to Figures 1 to 7 As shown, the specific optimization technical solution adopted by the present invention to solve the above technical problems is: the present invention relates to a high-pressure air gun bubble ice breaking field test method.

[0054] A high-pressure airgun bubble ice-breaking field test method, the method comprising the following steps:

[0055] Step 1: Select the test site;

[0056] The step 1 is specifically as follows:

[0057] Field tests need to take into account water flow and ice conditions. A site that can meet the test requirements should be selected based on the thickness of river ice or sea ice in historical years and the breadth of the test area. A test site that can meet the required temperature should be selected based on on-site ice thickness measurements and weather forecasts.

[0058] Step 2: Install the bubble generating equipment, insert the high pressure air gun bubble generating device into the ice hole and fix it;

[0059] The step 2 is specifically as follows:

[0060] Compress the liquid carbon dioxide into a cylindrical gun body structure through a high-pressure pump, install the excitation device in advance, and seal the high-pressure bubble gun to complete the test gas source preparation work, and carry the high-pressure air gun bubble generating device filled with liquid carbon dioxide, the safety controller and the power cord to the test site;

[0061] According to the ice thickness conditions required for the test, the air gun bubble explosion center position should be selected, and an ice core drill should be used to drill a hole at the explosion center position; according to the explosion distance required for the test, the air gun fixture should be adjusted to ensure that the air gun tip, i.e. the air gun bubble release position, is at the required underwater depth; the air gun tip is placed underwater, and the high-pressure air gun bubble generating device is inserted into the ice hole and fixed.

[0062] Step 3: Arrange the observation system and record the test images and data;

[0063] The step 3 is specifically as follows:

[0064] Place the No. 1 and No. 2 flow field pressure sensors at 1 times the estimated ice break radius, and use the two sensors to collect data for comparison to prevent sensor data anomalies. Place the No. 3 sensor at 2 times the estimated ice break radius, and compare the pressure data collected by the No. 3 sensor with the pressure data collected by the No. 1 and No. 2 sensors to detect the attenuation rate of the high-pressure bubble pulsation load in the flow field. Place the high-speed camera at a distance. Since the high-speed camera is relatively expensive, first of all, to ensure the safety of the high-speed camera, place the high-speed camera in a position where the broken ice thrown into the sky by the high-pressure gas destroying the ice plate cannot hit it. Secondly, adjust the high-speed camera to the required frame rate, lock the high-pressure air gun to the center of the picture, and adjust the lens focal length and the front and rear position of the camera according to the required picture detail. In addition, if you need to observe the height of the ice body being thrown or the lagging flow form, etc., you need to leave a certain margin above the picture for observation.

[0065] At a certain distance from the explosion center, underwater pressure sensors are deployed to measure the changes in flow field pressure during the evolution of the airgun bubble;

[0066] The pressure sensor uses PCB138 series underwater explosion sensor. The sensors are all installed vertically and use counterweights to ensure the working posture of the sensor.

[0067] An underwater camera was deployed slightly away from the explosion center to measure the morphological changes of the airgun bubble during its evolution.

[0068] At a greater distance, a high-speed camera was placed to capture the splashing of ice and the deformation of the water surface during the icebreaking process;

[0069] A drone was used to shoot the test process from above and record the response changes of the ice surface under the action of high-pressure air gun bubbles. In addition, a Sony FDR-AXP55 camera and a Nikon D7200 camera were used for auxiliary shooting and recording to ensure that the test image data was comprehensive and detailed.

[0070] Placing the airgun body in a floating structure or an underwater unmanned boat can realize the fixed-point icebreaking operation of the airgun at a predetermined depth underwater.

[0071] Step 4: Test preparation, use a long-distance power cable to connect the controller power supply, and guide the on-site personnel to a safe area;

[0072] Step 5: Detonation, opening the safety controller, the high-pressure gas generated by the expansion rapidly expands underwater to form underwater bubbles and destroy the ice layer;

[0073] The step 5 is specifically as follows:

[0074] The observer turns on the observation system, the blaster gives the detonation order and turns on the safety controller; when the microcurrent passes through the excitation device, high temperature is generated, which instantly vaporizes the liquid carbon dioxide. The high-pressure gas generated by the expansion will break through the sealing device and quickly spray outward from the air gun tip. The high-pressure gas generated by the expansion quickly expands underwater to form underwater bubbles and destroy the ice layer.

[0075] Step 6: Collect data.

[0076] Preferably, after the high pressure gas underwater pulsation ends, the observation data is saved and the observation system is turned off. The field test air gun bubble, pressure sensor, and underwater camera equipment are salvaged.

[0077] The present invention provides a high-pressure air gun bubble field test generating device, the device comprising: a fixed air gun fixture, a movable air gun fixture, a counterweight, a gun body CO2, an air gun muzzle, and a high-pressure air gun bubble generating device;

[0078] The cavity of the high-pressure air gun bubble generating device is filled with gun body CO2, the upper end of the high-pressure air gun bubble generating device is clamped by a fixed air gun clamp, the air gun mouth of the high-pressure air gun bubble generating device is inserted into the ice surface, the movable air gun clamp clamps the high-pressure air gun bubble generating device on the ice surface, the counterweight is fixed on the ice surface, and the two ends of the fixed air gun clamp and the movable air gun clamp are connected by ropes to fix them. Specific embodiment 2:

[0080] The difference between the second embodiment of the present application and the first embodiment is that:

[0081] After the high-pressure air gun generates high-pressure bubbles underwater, the bubbles pulsate underwater to generate shock waves, which penetrate the ice layer and cause damage, and generate tensile waves on the back of the ice and cause tensile damage. After the high-pressure bubbles pulsate to the maximum volume, they shrink. Due to the pressure gradient difference in the flow field, a high-speed water jet is generated that points to the ice layer, causing damage to the ice layer again.

[0082] Field test method for ice breaking with high pressure air gun bubbles

[0083] The field test method of high-pressure air gun bubble breaking ice is divided into six steps, namely: selecting the test site, installing the bubble generating equipment, arranging the observation system, test preparation, detonation, and data collection.

[0084] Field tests need to take into account water flow and icing conditions. A site that can meet the test requirements should be selected based on the thickness of river ice or sea ice in historical years and the breadth of the test area. A test site that can meet the required temperature should be selected based on actual ice thickness measurements and weather forecasts, as shown in Figure (1).

[0085] Different from the indoor mechanism experiment, due to the increase of ice breaking thickness and the demand of engineering application, the field test requires a larger airgun pressure value and more gas storage capacity. In addition, the increase of test parameters also further increases the requirements for test safety. Based on the test parameter requirements and test implementation conditions, the field test airgun bubble generation technology adopts liquid carbon dioxide heating expansion technology. Under the test environment, carbon dioxide gas can be converted into liquid at a certain high pressure and low temperature (the temperature of liquid carbon dioxide is about -40℃). The liquid carbon dioxide is compressed into a cylindrical gun body structure (high-pressure airgun bubble generation device) by a high-pressure pump, and the excitation device is installed in advance and the high-pressure bubble gun is sealed to complete the test gas source preparation. The high-pressure airgun bubble generation device filled with liquid carbon dioxide, the safety controller and the power cord are brought to the test site. According to the ice thickness conditions required for the test, the explosion center of the airgun bubble should be selected, and a hole should be drilled at the explosion center using an ice core drill; according to the explosion distance required for the test, the airgun fixture should be adjusted to ensure that the airgun head, i.e., the airgun bubble release position, is at the required underwater depth; the airgun head should be placed underwater, and the high-pressure airgun bubble generator should be inserted into the ice hole and fixed. The above placement of the bubble gun is also helpful for the engineering application research of the technology, i.e., the method of directly placing the bubble gun through a hole in the ice surface. This method can be used for channel icebreaking in ice-trapped accidents or ice clearing operations in northern winter. In addition, the airgun body can be placed in a floating structure or an underwater unmanned boat to achieve the fixed-point icebreaking operation of the bubble gun at a predetermined underwater depth. As shown in Figure (2).

[0086] In the field test of high-pressure airgun bubble breaking ice, the focus of the study is on the movement evolution of underwater high-pressure airgun bubbles and the destruction morphology of the ice surface under the action of airgun bubbles. It is necessary to collect various test data and images such as flow field pressure, underwater bubble morphology, and ice surface and free surface response. Therefore, the layout of various acquisition equipment and measurement devices must be considered in the overall layout of the field test. It is necessary to ensure that the layout of the acquisition equipment does not interfere with the high-pressure bubble gun icebreaking test process, and to obtain effective and clear test data to the greatest extent. Secondly, at a certain position away from the explosion center (the specific number and specific position of the sensor must be determined according to the specific working conditions), an underwater pressure sensor is deployed to measure the flow field pressure changes during the evolution of the airgun bubble. Here, the pressure sensor uses the PCB138 series underwater explosion sensor, which is specially used to measure the flow field pressure in underwater explosion-related tests, especially the measurement of shock wave loads. The sensor body uses a volume-sensitive tourmaline crystal, which is suspended and encapsulated in an insulating vinyl tube filled with silicone oil. This series of sensors has multiple models. The 138A01 model is mostly used in the test. The maximum range is 6895kPa, which meets the pressure range of the airgun bubble in the field test. The sensors are all installed vertically, and the counterweight is used to ensure the working posture of the sensor. The signal acquisition system corresponding to the sensor uses the Jianyi 62590 high-speed acquisition instrument. The acquisition card is PCIe / PXIe-69834, which provides 4 16-bit synchronous analog input channels and supports a maximum sampling rate of 80MS / s to meet the acquisition requirements of high-frequency signals such as explosion shock waves. Again, an underwater camera is deployed at a distance slightly from the explosion center to measure the morphological changes during the evolution of the airgun bubble. The underwater camera model is the GLF-ZWDZ-200 underwater camera, which can work normally at 300m underwater and has impact resistance. The maximum pixel of the camera is 2 million and uses a fixed-focus lens. The camera is equipped with a 50W underwater fill light, which can provide a maximum luminous flux of 5600lm. In order to ensure the normal operation of the underwater camera, an underwater photography workbench was developed to adjust the working depth of the camera underwater. At a farther distance, a high-speed camera was placed to collect the splashes of the ice surface and the deformation of the water surface during the ice breaking process. The high-speed camera uses a Photron mini AX100 camera, which can capture the slight changes of the ice surface and the free surface. In addition, a drone was used to shoot the test process from the air. The model is DJI PHANTOM 4PRO. The camera equipped has an effective pixel of 20 million, which can clearly record the response changes of the ice surface under the action of high-pressure air gun bubbles. In addition, Sony FDR-AXP55 camera and Nikon D7200 camera are used for auxiliary shooting and recording to ensure that the test image data is comprehensive and detailed. As shown in Figures (3)(4)(5)(6).

[0087] Place the No. 1 and No. 2 flow field pressure sensors at 1 times the estimated ice break radius, and use the two sensors to collect data for comparison to prevent sensor data anomalies. Place the No. 3 sensor at 2 times the estimated ice break radius, and compare the pressure data collected by the No. 3 sensor with the pressure data collected by the No. 1 and No. 2 sensors to detect the attenuation rate of the high-pressure bubble pulsation load in the flow field. Place the high-speed camera at a distance. Since the high-speed camera is relatively expensive, first of all, to ensure the safety of the high-speed camera, place the high-speed camera in a position where the broken ice thrown into the sky by the high-pressure gas destroying the ice plate cannot hit it. Secondly, adjust the high-speed camera to the required frame rate, lock the high-pressure air gun to the center of the picture, and adjust the lens focal length and the front and rear position of the camera according to the required picture detail. In addition, if you need to observe the height of the ice body being thrown or the lagging flow form, etc., you need to leave a certain margin above the picture for observation.

[0088] According to the test requirements, after determining the test conditions, use a long-distance power cable to connect the controller power supply and guide the on-site personnel to a safe area.

[0089] The observer turns on the observation system, the blaster gives the detonation command, and turns on the safety controller. When the microcurrent passes through the excitation device (high-temperature heat-conducting rod), high temperature is generated, and the liquid carbon dioxide (density) is instantly gasified (expanded 600 times). The high-pressure gas (density) generated by the expansion will break through the sealing device and quickly spray outward from the air gun head. The entire process from excitation to completion only takes 0.4ms. The high-pressure bubble generating device does not blend with the liquid and gas in the surrounding environment, does not produce any harmful gases, does not generate arcs and sparks, and is not affected by high temperature, high heat, high humidity, and high cold. Carbon dioxide is an inert gas that is non-flammable and explosive, and the blasting process is a process of volume expansion. The high-pressure gas generated by the expansion expands rapidly underwater to form underwater bubbles and destroy the ice layer.

[0090] After the high-pressure gas underwater pulsation ends, save the observation data and close the observation system. Salvage the field test air gun bubble, pressure sensor, underwater camera and other equipment.

[0091] The experiment is over. Specific embodiment three:

[0093] The difference between the third embodiment of the present application and the second embodiment is that:

[0094] The present invention provides a computer-readable storage medium on which a computer program is stored. The program is executed by a processor to implement a high-pressure air gun bubble ice-breaking field test method. Specific embodiment four:

[0096] The difference between the fourth embodiment of the present application and the third embodiment is that:

[0097] The present invention provides a computer device, comprising a memory and a processor, wherein the memory stores a computer program, and when the processor executes the computer program, a high-pressure air gun bubble ice-breaking field test method is implemented.

[0098] In the description of this specification, the description of reference terms such as "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or N embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples without contradiction. In addition, the terms "first" and "second" are used only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" can explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "N" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined. Any process or method description in the flowchart or otherwise described herein may be understood to represent a module, fragment or portion of code including one or more executable instructions for implementing the steps of a custom logic function or process, and the scope of the preferred embodiment of the present invention includes other implementations, in which the functions may not be performed in the order shown or discussed, including in a substantially simultaneous manner or in a reverse order according to the functions involved, which should be understood by a person skilled in the art of the art to which the embodiments of the present invention belong. The logic and / or steps represented in the flowchart or otherwise described herein, for example, may be considered as a sequenced list of executable instructions for implementing the logic function, and may be specifically implemented in any computer-readable medium for use by an instruction execution system, device or apparatus (such as a computer-based system, a system including a processor or other system that can fetch instructions from an instruction execution system, device or apparatus and execute instructions), or in combination with these instruction execution systems, devices or apparatuses. For the purposes of this specification, "computer-readable medium" may be any device that can contain, store, communicate, propagate or transmit a program for use by an instruction execution system, device or apparatus, or in combination with these instruction execution systems, devices or apparatuses. More specific examples (a non-exhaustive list) of computer-readable media include the following: an electrical connection having one or N wirings (electronic device), a portable computer disk case (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), a fiber optic device, and a portable compact disk read-only memory (CDROM).In addition, the computer readable medium can even be paper or other suitable medium on which the program can be printed, because the program can be obtained electronically, for example, by optically scanning the paper or other medium, then editing, interpreting or processing in other suitable ways as necessary, and then storing it in a computer memory. It should be understood that the various parts of the present invention can be implemented with hardware, software, firmware, or a combination thereof. In the above-mentioned embodiment, N steps or methods can be implemented with software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented with hardware, as in another embodiment, any one of the following technologies known in the art or their combination can be used to implement: a discrete logic circuit with a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit with a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0099] The above is only a preferred implementation of a high-pressure airgun bubble ice-breaking field test method. The protection scope of a high-pressure airgun bubble ice-breaking field test method is not limited to the above embodiment. All technical solutions under this idea belong to the protection scope of the present invention. It should be pointed out that for those skilled in the art, several improvements and changes without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A high-pressure airgun bubble ice-breaking field test method, the method is implemented based on a high-pressure airgun bubble field test generating device, the device comprising: Fixed air gun fixture, movable air gun fixture, counterweight, gun body CO2, air gun muzzle, high pressure air gun bubble generating device; The cavity of the high-pressure airgun bubble generating device is filled with gun body CO2, the upper end of the high-pressure airgun bubble generating device is clamped by a fixed airgun clamp, the airgun mouth of the high-pressure airgun bubble generating device is inserted into the ice surface, the movable airgun clamp clamps the high-pressure airgun bubble generating device on the ice surface, the counterweight is fixed on the ice surface, and the two ends of the fixed airgun clamp and the movable airgun clamp are connected by a rope to fix them. The method is characterized in that: the method comprises the following steps: Step 1: Select the test site; The step 1 is specifically as follows: Field tests need to take into account water flow and ice conditions. A site that meets the test requirements should be selected based on the thickness of river ice or sea ice in historical years and the breadth of the test area. A test site that meets the required temperature should be selected based on on-site ice thickness measurements and weather forecasts. Step 2: Install the bubble generating equipment, insert the high pressure air gun bubble generating device into the ice hole and fix it; The step 2 is specifically as follows: Compress the liquid carbon dioxide into a cylindrical gun body structure through a high-pressure pump, install the excitation device in advance, and seal the high-pressure bubble gun to complete the test gas source preparation work, and carry the high-pressure air gun bubble generating device filled with liquid carbon dioxide, the safety controller and the power cord to the test site; The airgun bubble explosion center position should be selected according to the ice thickness conditions required for the test, and a hole should be drilled at the explosion center position using an ice core drill; the airgun fixture should be adjusted according to the explosion distance required for the test to ensure that the airgun gun head is at the required underwater depth; the airgun gun head should be placed underwater, and the high-pressure airgun bubble generator should be inserted into the ice hole and fixed; Step 3: Arrange the observation system and record the test images and data; Step 4: Test preparation, use a long-distance power cable to connect the controller power supply, and guide the on-site personnel to a safe area; Step 5: Detonation, opening the safety controller, the high-pressure gas generated by the expansion rapidly expands underwater to form underwater bubbles and destroy the ice layer; Step 6: Collect data.

2. The method according to claim 1, characterized in that: The step 3 is specifically as follows: At a certain distance from the explosion center, underwater pressure sensors are deployed to measure the changes in flow field pressure during the evolution of the airgun bubble; The pressure sensor uses PCB138 series underwater explosion sensor. The sensors are all installed vertically and use counterweights to ensure the working posture of the sensors. At a distance from the explosion center, an underwater camera was deployed to measure the morphological changes of the airgun bubble during its evolution; On the outer side of the river bank, a high-speed camera was placed to capture the splashing of ice and the deformation of the water surface during the icebreaking process; A drone was used to shoot the test process from above and record the response changes of the ice surface under the action of high-pressure air gun bubbles. In addition, a Sony FDR-AXP55 camera and a Nikon D7200 camera were used for auxiliary shooting and recording to ensure that the test image data was comprehensive and detailed.

3. The method according to claim 2, characterized in that: The airgun body is placed in a floating structure or an underwater unmanned boat to achieve the fixed-point icebreaking operation of the airgun at a predetermined depth underwater.

4. The method according to claim 3, characterized in that: The step 5 is specifically as follows: The observer turns on the observation system, the blaster gives the detonation order and turns on the safety controller; when the microcurrent passes through the excitation device, high temperature is generated, which instantly vaporizes the liquid carbon dioxide. The high-pressure gas generated by the expansion will break through the sealing device and quickly spray outward from the air gun tip. The high-pressure gas generated by the expansion quickly expands underwater to form underwater bubbles and destroy the ice layer.

5. The method according to claim 4, characterized in that: After the underwater pulsation of high-pressure gas ends, the observation data is saved and the observation system is turned off, and the field test air gun bubble, pressure sensor, and underwater camera equipment are salvaged.

6. A computer-readable storage medium having a computer program stored thereon, characterized in that: The program is executed by a processor to implement the method according to any one of claims 1 to 5.

7. A computer device comprising a memory and a processor, wherein the memory stores a computer program, wherein: When the processor executes the computer program, the method according to any one of claims 1 to 5 is implemented.

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