Measurement system and method for deformation coordination capability of pressure-resistant cabin section model platform

Abstract

The invention provides a system and method for measuring the deformation coordination capability of a pressure-resistant cabin model platform, and the system comprises a measurement reference which is a steel wire, the steel wire is horizontally disposed above a to-be-measured cabin model platform and is parallel to the to-be-measured cabin model platform, and the to-be-measured cabin model platform is provided with a plurality of measurement points. According to the method, the measurement precision and efficiency can be effectively improved, and the actual application requirements of the pressure-resistant cabin section model platform can be better met.

Description

Technical Field

[0001] The invention belongs to the technical field of hull structures, and in particular relates to a system and method for measuring the deformation coordination capability of a pressure compartment model platform. Background Art

[0002] With the continuous development of underwater vehicle technology, the requirements for the structural safety and stability of the vehicle are becoming higher and higher. Under the action of external deep-water pressure, the pressure-resistant body of the vehicle will produce structural deformation, which will then laterally squeeze the internal platform to cause its deformation. If the deformation of the pressure-resistant body and the platform is not coordinated, the platform may be deformed, damaged or permanently deformed, affecting the safety and stability of the platform structure. Accurate measurement of its deformation is crucial to ensure the structural safety and design quality of the vehicle. Conventional structural deformation measurement methods include laser scanning and optical measurement. As an advanced non-contact measurement technology, it has certain advantages, but also has some limitations. First, the measurement accuracy is insufficient. The laser scanning method is efficient, but the measurement range has a greater impact on the measurement accuracy. The optical measurement method is highly dependent on light. Insufficient light or poor light quality may affect the measurement accuracy. Second, conventional laser scanning and optical measurement methods are greatly affected by the environment. External factors (such as temperature, humidity, vibration, etc.) may affect the reception of laser or light, resulting in inaccurate measurement data. Third, laser scanning and optical measurement equipment usually have high operating requirements and manufacturing costs, which increases the threshold and cost of application. Fourth, high-precision equipment such as laser scanning and optical measurement requires cumbersome settings and calibration, professional operation and maintenance, and reduces measurement efficiency. Therefore, existing deformation measurement methods such as laser scanning and optical measurement have problems such as complex operation, high cost, and great influence of environmental conditions, which cannot meet the needs of modern underwater vehicles for high precision and high efficiency.

[0003] Therefore, it is of great significance to develop an efficient, accurate and cost-effective method to measure the deformation of the internal platform of underwater vehicles. As a structural deformation measurement technology with simple operation, high accuracy, low cost and wide application range, the wire drawing method has shown great application potential in engineering practice with its unique advantages. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a system and method for measuring the deformation coordination ability of a pressure compartment model platform in response to the above-mentioned problems. The linearity and stability of the steel wire are utilized to measure the offset of each point of the platform relative to the steel wire to determine the deformation of the platform. This method can effectively improve the measurement accuracy and efficiency, and better meet the actual application needs of the pressure compartment model platform.

[0005] The technical solution adopted by the present invention to solve the above-mentioned technical problems is: a measurement system for the deformation coordination ability of a pressure-resistant cabin model platform, characterized in that it includes a measurement reference, the measurement reference is a steel wire, the steel wire is horizontally arranged above the cabin model platform to be measured, and is arranged parallel to the cabin model platform to be measured, and a plurality of measurement points are arranged on the cabin model platform to be measured.

[0006] According to the above scheme, one end of the steel wire is fixed on the fixing hook, the fixing hook is fixed on the pressure cabin shell, and the other end of the steel wire is fixed on the pressure cabin shell through a tensioner.

[0007] According to the above scheme, a plurality of pressure-resistant ribs are evenly spaced on the inner wall of the pressure cabin shell, and there are two steel wires, one is arranged at the pressure-resistant rib near the middle position of the pressure cabin, and the other is arranged at the middle rib position between two adjacent pressure-resistant ribs near the middle position of the pressure cabin.

[0008] According to the above scheme, the measuring point is located on the cabin model platform directly below the steel wire.

[0009] According to the above scheme, the length of the steel wire is 180mm to 200mm greater than the width of the cabin model platform, and the distance between the steel wire and the cabin model platform is 250mm to 350mm.

[0010] According to the above scheme, the measuring points include a mid-span measuring point corresponding to the midpoint of the steel wire, and a port side measuring point and a starboard side measuring point corresponding to the midpoint.

[0011] According to the above solution, the steel wire is an alloy steel wire.

[0012] A method for measuring a system for measuring deformation coordination capability of a pressure compartment model platform, characterized in that it comprises the following steps:

[0013] Step a, preparation before measurement:

[0014] Before measuring the deformation of the cabin model platform, it is necessary to ensure that the cabin model platform is in a normal horizontal and stable state, and remove the debris on the platform. At the same time, select an alloy steel wire with elastic modulus and tensile strength that meets the requirements as a measuring tool;

[0015] Step b, fixing and installing the steel wire:

[0016] The steel wire is installed between two fixed points on the port and starboard sides of the cabin model platform. The fixed points are selected on the pressure ribs and the pressure cabin shell. At the same time, when fixing the steel wire, a steel wire tensioner is used to tighten the steel wire and keep it parallel to the surface of the cabin model platform to ensure that the steel wire will not move or deform during the measurement process.

[0017] Step c, measurement point arrangement:

[0018] The measurement points are selected in the areas of the cabin model platform that are susceptible to deformation. At the same time, the main deformation positions of the cabin model platform are determined through simulation calculations before measurement to ensure that the number of measurement points is sufficient;

[0019] Step d, data recording and processing:

[0020] During the measurement process, the data of each measuring point is recorded in detail, including the initial vertical distance between the steel wire and the measuring point, and the vertical distance between the steel wire and the measuring point after deformation. After the measurement is completed, the deformation of each measuring point of the cabin model platform is calculated, and the deformation of the cabin model platform is obtained to judge the deformation coordination ability of the pressure cabin model platform structure.

[0021] The beneficial effects of the present invention are: 1. A system and method for measuring the deformation coordination ability of a pressure compartment model platform are provided, which can quickly and accurately measure the vertical distance of each point of the platform structure of the pressure compartment model relative to the reference (steel wire) after the hydraulic test, and then deduce the offset (deformation) of the vertical distance of each measuring point relative to the initial state (before the hydraulic test), ensuring the accuracy within 1 mm, providing initial data for the subsequent evaluation of the deformation ability of the platform structure, which is beneficial to the safety and stability design of the platform structure; 2. The method is simple to operate, reduces the setup and calibration work before measurement, and improves the measurement efficiency; adopts more economical measurement equipment and methods, and reduces the use cost; 3. The influence of external factors on the measurement results is reduced, the stability of the measurement results is improved, and it has important practical application value. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 A plan view of a pressure compartment model platform according to an embodiment of the present invention;

[0024] Figure 2 The figure is a cross-sectional view of a pressure compartment model platform according to an embodiment of the present invention. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0026] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0027] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0028] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the application is usually placed when in use. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0029] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0030] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" 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 elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0031] In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0032] The features and performance of the present application are further described in detail below in conjunction with the embodiments.

[0033] like Figure 1 , Figure 2 As shown, a system for measuring the deformation coordination ability of a pressure-resistant cabin model platform includes a measurement reference, which is a steel wire 1. The steel wire is horizontally arranged above the cabin model platform 2 to be measured and is arranged parallel to the cabin model platform to be measured. A plurality of measurement points are arranged on the cabin model platform to be measured.

[0034] One end of the steel wire is fixed to the fixing hook 3, which is fixed to the pressure cabin shell 4, and the other end of the steel wire is fixed to the pressure cabin shell through the tensioner 5. When fixing the steel wire, the steel wire tensioner is used to tighten the steel wire and keep it parallel to the platform surface to ensure that the steel wire will not move or deform during the measurement process, which will affect the measurement accuracy.

[0035] The inner wall of the pressure cabin shell is evenly spaced with multiple pressure ribs 6. There are two steel wires, one is located at the pressure rib near the middle of the pressure cabin, and the other is located at the middle rib between two adjacent pressure ribs near the middle of the pressure cabin. The steel wire installation and fixing points should be selected on the pressure ribs and pressure shell with stable structure and high rigidity to prevent additional deformation during the measurement process.

[0036] The measuring points are located on the cabin model platform directly below the steel wire, including a mid-span measuring point corresponding to the midpoint of the steel wire, and a port side measuring point and a starboard side measuring point corresponding to the midpoint, which can fully reflect the deformation of the hull platform.

[0037] The length of the steel wire is 180mm to 200mm greater than the width of the cabin model platform, and the distance between the steel wire and the cabin model platform is 250mm to 350mm.

[0038] The steel wire is an alloy steel wire with high elastic modulus and tensile strength to ensure the accuracy and stability of the measurement results. The steel wire diameter is selected to be 1.0mm, and the length is not less than the horizontal width of the platform to meet the requirements of measurement accuracy and range.

[0039] The measuring method of the above-mentioned measuring system comprises the following steps:

[0040] 1. Preparation before measurement:

[0041] Before measuring the deformation of the cabin model platform, it is necessary to ensure that the cabin model platform is in a normal horizontal and stable state, and remove the debris on the platform. At the same time, select an alloy steel wire with elastic modulus and tensile strength that meets the requirements as a measuring tool.

[0042] 2. Fixing and installation of steel wire:

[0043] The steel wire is installed between two fixed points on the left and right sides of the cabin model platform. The fixed points are selected on the pressure ribs and the pressure cabin shell. At the same time, when fixing the steel wire, a wire tensioner is used to tighten the steel wire and keep it parallel to the surface of the cabin model platform to ensure that the steel wire will not move or deform during the measurement process.

[0044] 3. Measurement point arrangement:

[0045] The measurement points are selected in the areas of the cabin model platform that are susceptible to deformation. At the same time, the main deformation positions of the cabin model platform are determined through simulation calculations before measurement to ensure that there are enough measurement points.

[0046] 4. Data recording and processing:

[0047] During the measurement process, the data of each measuring point is recorded in detail, including the initial vertical distance between the steel wire and the measuring point, and the vertical distance between the steel wire and the measuring point after deformation. After the measurement is completed, the deformation of each measuring point of the cabin model platform is calculated, and the deformation of the cabin model platform is obtained to judge the deformation coordination ability of the pressure cabin model platform structure.

[0048] Example 1

[0049] Step 1: Work preparation

[0050] Before measuring the deformation of the cabin model platform to be measured, the cabin model is in a normal horizontal and stable state; at the same time, determine the measurement range of the cabin model platform, including the entire platform structure, and the measurement accuracy is required to be no more than 1mm; prepare measuring tools, including alloy steel wire, tensioner, vernier caliper (minimum accuracy is 0.1mm), level ruler, etc.; at the same time, clean the cabin model platform to be measured to ensure that there is no interference from debris.

[0051] Step 2: Lay out the wire

[0052] According to the platform width, the selected steel wire length is about 200mm larger than the platform width. The steel wire is connected with the left and right horizontal positions about 300mm above the cabin model platform. The steel wire is divided into two groups: one group is set at the pressure rib near the middle of the platform (positive rib position), and the other group is set between the two pressure ribs near the middle of the platform (half-gear position). One end of the steel wire is fixed by a fixing hook welded on the pressure rib and the pressure shell, and the other end is tightened by a tensioner to ensure that the steel wire is straight and stable. The steel wire should be kept parallel to the cabin model platform surface to avoid excessive tension of the steel wire, which will cause the steel wire to sag or shake, resulting in measurement errors. At the same time, use a level to check whether the entire steel wire is parallel to the platform. If there are deviations such as bending or twisting, adjustments should be made to avoid distortion of the measurement results.

[0053] Step 3: Mark the measurement points

[0054] Select representative measuring points on the cabin model platform directly below the steel wire, including at least one point in the middle of the span and one point on each of the port and starboard sides. These positions represent typical parts of the cabin model platform with large deformation, which can be obtained in advance through simulation calculations. Use a marker pen to mark the measuring points for easy measurement. The middle of the span and the port and starboard measuring points at the positive rib position are marked as points A, B, and C respectively. Similarly, the middle of the span and the port and starboard measuring points at the half-gear position of the cabin model platform are marked as points D, E, and F respectively.

[0055] Step 4: Measure the offset

[0056] Keep the steel wire taut, use a vernier caliper to measure the vertical distance from each measuring point to the steel wire after the cabin model is subjected to the external pressure test, and calculate the offset (deformation) of each measuring point of the platform by comparing it with the initial state before the external pressure test. For example, the vertical distance between measuring point A and the steel wire before the external pressure test is H a , the vertical distance between the measuring point A and the steel wire after the external pressure test is H a1 , then the deformation offset Δha at the measuring point A = |H a -H a1 |, and similarly, the deformation offsets Δhb, Δhc, Δhd, Δhe, and Δhf of measuring points B, C, D, E, and F can be calculated.

[0057] When a cabin model platform is partially deformed, it is necessary to add measuring points G, H, I... at the deformed location, and similarly measure the deformation offset Δhg, Δhh, Δhi... During the measurement process, the vernier caliper should be kept perpendicular to the steel wire to improve the measurement accuracy.

[0058] Step 5: Data processing and analysis

[0059] The deformation measurement data of each measuring point of the cabin model platform are sorted out, a deformation schematic diagram of the cabin model platform is drawn, and the deformation conditions and laws of the pressure cabin model platform structure are analyzed to evaluate the deformation coordination ability of the platform structure.

[0060] Example 2

[0061] The full-scale cabin model includes a pressure hull, pressure ribs and a platform, with a total length of about 9.52m. The diameter of the pressure hull is 7m, one end is open, and the other end is designed as a spherical bulkhead. The platform and the pressure hull are designed in a quasi-elastic manner to enhance the deformation coordination ability of the platform. In theory, the pressure hull will produce a certain amount of shrinkage deformation due to external pressure, which will squeeze the internal platform structure and cause the platform to deform. Severe problems may cause permanent deformation or damage to the platform. The smaller the platform deformation, the better its deformation coordination ability.

[0062] For this embodiment, during the full-scale cabin model test, the vertical deformations of the cabin model platform 3 measuring points A, B, C, D, E, and F before and after a certain extreme external pressure is applied to the surface of the pressure hull are measured respectively, and then the vertical deformation offsets of the platform measuring points are calculated. Δha=0mm, Δhb=2.0mm, Δhc=2.0mm, Δhd=-1.8mm, Δhe=-2.0mm, Δhf=1.1mm. It can be seen that the maximum vertical deformation offset of the platform is between -2.0mm and 2.0mm, and the deformation is relatively small. At the same time, through simulation calculation, it is concluded that when the deformation coordination design (rigid connection) is not adopted between the model platform and the pressure hull of this cabin section, the vertical deformation offsets of the platform measuring points A, B, C, D, E, and F are: Δha′=-9.4mm, Δhb′=-7.6mm, Δhc′=-7.6mm, Δhd′=-8.87mm, Δhe′=--7.3mm, Δhf′=-7.3mm, and the vertical deformation offsets of the platform measuring points are between -9.4mm and -7.3mm, and the deformation is relatively large.

[0063] This shows that compared with the rigid connection between the platform and the pressure hull, the deformation coordination between the platform and the pressure hull is good after the elastic connection is adopted. This cabin section model well verifies the deformation coordination of the internal platform at great depth.

[0064] The above is only a preferred specific implementation of the present invention; however, the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solution and its improved conception within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A system for measuring the deformation coordination capability of a pressure compartment model platform, characterized in that: It includes a measurement reference, which is a steel wire. The steel wire is horizontally arranged above the cabin section model platform to be measured and parallel to the cabin section model platform to be measured. The cabin section model platform to be measured is provided with multiple measurement points.

2. A system for measuring deformation coordination capability of a pressure compartment model platform according to claim 1, characterized in that: One end of the steel wire is fixed on a fixing hook, the fixing hook is fixed on the pressure cabin shell, and the other end of the steel wire is fixed on the pressure cabin shell through a tensioner.

3. A system for measuring deformation coordination capability of a pressure compartment model platform according to claim 2, characterized in that: The inner wall of the pressure cabin shell is evenly spaced with a plurality of pressure-resistant ribs. There are two steel wires, one is arranged at a pressure-resistant rib near the middle position of the pressure cabin, and the other is arranged at the middle rib position between two adjacent pressure-resistant ribs near the middle position of the pressure cabin.

4. A system for measuring deformation coordination capability of a pressure compartment model platform according to claim 3, characterized in that: The measuring point is located on the cabin model platform directly below the steel wire.

5. A system for measuring deformation coordination capability of a pressure compartment model platform according to claim 3 or 4, characterized in that: The length of the steel wire is 180mm to 200mm greater than the width of the cabin model platform, and the distance between the steel wire and the cabin model platform is 250mm to 350mm.

6. A system for measuring deformation coordination capability of a pressure compartment model platform according to claim 4, characterized in that: The measuring points include a mid-span measuring point corresponding to the midpoint of the steel wire, and a port side measuring point and a starboard side measuring point corresponding to the midpoint.

7. A system for measuring deformation coordination capability of a pressure compartment model platform according to claim 5, characterized in that: The steel wire is alloy steel wire.

8. A method for measuring the deformation coordination capability of a pressure compartment model platform using a measuring system according to claim 6, characterized in that: The steps include: Step a, preparation before measurement: Before measuring the deformation of the cabin model platform, it is necessary to ensure that the cabin model platform is in a normal horizontal and stable state, and remove the debris on the platform. At the same time, select an alloy steel wire with elastic modulus and tensile strength that meets the requirements as a measuring tool; Step b, fixing and installing the steel wire: The steel wire is installed between two fixed points on the port and starboard sides of the cabin model platform. The fixed points are selected on the pressure ribs and the pressure cabin shell. At the same time, when fixing the steel wire, a steel wire tensioner is used to tighten the steel wire and keep it parallel to the surface of the cabin model platform to ensure that the steel wire will not move or deform during the measurement process. Step c, measurement point arrangement: The measurement points are selected in the areas of the cabin model platform that are susceptible to deformation. At the same time, the main deformation positions of the cabin model platform are determined by simulation calculation before measurement to ensure that the number of measurement points is sufficient; Step d, data recording and processing: During the measurement process, the data of each measuring point is recorded in detail, including the initial vertical distance between the steel wire and the measuring point, and the vertical distance between the steel wire and the measuring point after deformation. After the measurement is completed, the deformation of each measuring point of the cabin model platform is calculated, and the deformation of the cabin model platform is obtained to judge the deformation coordination ability of the pressure cabin model platform structure.

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