Universal auxiliary frame for water elastic ship model pool test and use method

Abstract

The invention relates to a universal auxiliary frame for a water elasticity ship model pool test and a use method. The universal auxiliary frame comprises a frame, the movable horizontal cross beam is connected with the frame supporting end face through a bolt in a horizontally adjustable manner; the vertical supporting rod is used for supporting the ship model and ensuring the stability of the ship model; the transverse gradienter and the longitudinal gradienter are respectively arranged at different positions of the frame and are used for ensuring the horizontal state of the frame. The frame is compact and reasonable in structure and convenient to operate, the frame is specially customized for the sectional type ship model, the structural safety and stability of the ship model in the hanging, transporting, equipment installing and testing processes are effectively improved through a firm and accurate supporting structure, and meanwhile in the testing process, the test efficiency is improved. The precision measurement system arranged in the frame can accurately monitor the swing period and the horizontal state of the ship model, and ensures the accuracy of the ballast position and the accurate correspondence between the ship model and the real ship mass distribution and the swing period.

Description

Technical Field

[0001] The present embodiment relates to the field of ship stress monitoring technology, and more particularly to an auxiliary framework for a universal hydroelastic ship model tank test and a method of using the same. Background Art

[0002] As ships gradually develop towards larger, faster and lighter weight, the natural vibration frequency of the hull is gradually approaching the frequency encountered in actual navigation conditions, which may cause the hull structure to resonate in certain navigation conditions and marine environments, causing a sharp increase in the wave load on the ship, seriously threatening the navigation safety of the ship. In order to study the changes in wave loads on large ships in the marine environment, hydroelastic ship models are usually used, and the segmented ship model is the most common research object among the hydroelastic ship models. As an important tool for studying the hydroelastic effect of the hull, the tank test plays a key role in evaluating the structural strength of large ships.

[0003] The segmented ship model cuts the overall rigid hull into several rigid ship model segments, and connects these ship model segments together through measuring beams to simulate the structural dynamic characteristics of the actual ship. At the same time, strain sensors are installed on these measuring beams to measure the strain force received by each ship model segment, and further obtain the distribution law of wave loads on various parts of the ship.

[0004] For larger-scale segmented ship models, the mass of each segment of the ship model is large, and the stiffness of the measuring beam is relatively weak. If it is affected by large external forces during the implementation of hoisting, transportation, and equipment installation, it may bring greater structural safety hazards to the test ship model. This is because there is no special frame for the segmented ship model during the traditional hoisting, transportation, and equipment installation process. Most of them adopt the method of installing additional auxiliary steel beams on the side of the deck of the ship model to ensure the structural safety of the ship model. This structural design not only increases the workload of the ship model design and construction and on-site disassembly and installation stages, but also the auxiliary steel beams with large installation accuracy errors bring large errors to the quality debugging of the ship model. At the same time, the segmented ship model may be subjected to a large inertial force on the ship model measuring beam due to bumpy road conditions during transportation. If the ship model is not sufficiently supported and protected, the strain sensor on the measuring beam may be affected, thereby affecting the accuracy of the data during the water tank test.

[0005] At the same time, when the segmented ship model simulates the actual ship, the ballast position in each ship model segment in the segmented ship model is adjusted by lateral and longitudinal swinging through the inertia frame equipment. The specific method is to make the weight of each ship model segment of the ship model correspond to the weight ratio of the actual ship, and at the same time ensure that the swing period of the ship model corresponds to the swing period of the actual ship. However, in the traditional method, a separate measuring tool is designed, and when measuring the swing period of the segmented ship model, when determining whether the ship model is horizontal, the level is usually installed on the ship model. However, once the ship model deviates from the measuring frame, the subsequent measurement results will be inaccurate, and the correct position of the ballast cannot be determined, thereby affecting the quality of the ship model.

[0006] To this end, we propose an auxiliary framework and usage method for a universal hydroelastic ship model tank test. Summary of the invention

[0007] In view of the shortcomings of the above-mentioned existing production technology, the applicant provides a universal auxiliary frame and use method for water tank testing of hydroelastic ship models, which effectively improves the structural safety and stability of the ship model during hoisting, transportation, equipment installation and testing.

[0008] The technical solutions adopted in this embodiment are as follows:

[0009] An auxiliary framework for a universal hydroelastic ship model tank test, comprising:

[0010] A frame, composed of a plurality of supporting longitudinal beams, a plurality of supporting transverse beams and a plurality of vertical steel beams, for providing overall structural support;

[0011] The movable horizontal beam can be adjusted in longitudinal position horizontally by bolts and is connected to the frame support end surface to support the vertical support rods and provide flexible adjustment of the beam position;

[0012] A plurality of vertical support rods, each of which has an adjustable length and is used to compensate for the vertical distance between the corresponding point of the ship model and the frame, so as to support the ship model and ensure its stability;

[0013] The horizontal level and the vertical level are arranged at different positions of the frame to monitor the frame posture information.

[0014] Furthermore, the vertical support rod includes an upper buffer head or a combination structure of a bottom threaded rod and an upper buffer head, or a combination structure of a bottom threaded rod, a middle support rod and an upper buffer head, to achieve different length adjustments.

[0015] Furthermore, the upper buffer head and the bottom threaded rod are detachably connected in the crossbeam bolt hole, the upper buffer head and the middle support rod are detachably connected in the bottom threaded rod, the upper buffer head is detachably connected in the middle support rod, and a rubber buffer material is provided at the upper end of the upper buffer head.

[0016] Furthermore, an auxiliary framework for a universal hydroelastic ship model tank test also includes:

[0017] The knife edge installation interface is used for installing the knife edge base during inertia adjustment;

[0018] Removable universal wheels and lifting rings are used to facilitate the transportation and lifting of the ship model;

[0019] The frame steel ruler and grid line markings are used to quickly and accurately locate the position during the installation and commissioning of the test ship model equipment.

[0020] Furthermore, the mid-longitudinal and mid-transverse sections of the ship model coincide with the mid-longitudinal and mid-transverse sections of the frame respectively.

[0021] A method for using a universal hydroelastic ship model water tank test auxiliary frame, which is used to use the above-disclosed universal hydroelastic ship model water tank test auxiliary frame, comprises the following steps:

[0022] S1. Ship model placement and positioning: According to the ship model parameters and the ship model segmentation, select a suitable position to place the movable horizontal beam, set the position and length of the vertical support rod, and place the ship model on the vertical support rod so that the mid-longitudinal and mid-transverse sections of the ship model coincide with the mid-longitudinal and mid-transverse sections of the frame respectively;

[0023] S2. Inertia adjustment: Use the horizontal and vertical levels to check the frame posture, install the knife-edge installation interface, measure the roll and pitch natural periods of the ship model through the inertia frame, compare them with the corresponding periods of the real ship, and continuously adjust the position of the corresponding ballast of the ship model until the corresponding natural period of the ship model matches that of the real ship;

[0024] S3. Lifting, transportation and placement of the ship model: Use the lifting ring to lift and sink the frame supporting the ship model into the test pool, so that the ship model will be separated from the frame under the action of buoyancy.

[0025] Furthermore, in step S1, it is also included to ensure that the movable horizontal beam is located at the center of gravity of each ship model segment of the ship model to improve the support stability and the test accuracy.

[0026] Furthermore, in step S2, high-precision measuring tools are used in conjunction with a transverse level and a longitudinal level to ensure the horizontality of the frame and the ship model, and the load position is adjusted by implementing free pitch and free roll respectively to ensure that the mass distribution of the ship model is close to that of the actual ship.

[0027] Furthermore, in step S3, before the ship model is launched into water, the grid line markings of the frame steel ruler and the grid line markings are used to quickly and accurately locate the position during the installation and commissioning of the test ship model equipment.

[0028] Furthermore, it also includes customizing the size and shape of the frame, as well as the configuration of the movable horizontal beam and the vertical support rod according to the test requirements and the size of the ship model before the S1 step.

[0029] The beneficial effects of this embodiment are as follows:

[0030] The invention has a compact and reasonable structure and is easy to operate. The frame is specially tailored for segmented ship models. Through a solid and precise support structure, the structural safety and stability of the ship model during hoisting, transportation, equipment installation and testing are effectively improved. Its modular and adjustable design enables the frame to adapt to ship models of different sizes and types, greatly enhancing the versatility and flexibility of use. At the same time, during the inertia adjustment process of the ship model, the precision measurement system built into the frame can not only accurately detect the horizontal state of the ship model, but also quickly and accurately adjust the ballast position, thereby ensuring that the pitch and roll cycles of the ship model accurately correspond to the actual ship. This not only improves the accuracy and reliability of the test data, but also provides strong support for in-depth research on the hydroelastic effect of the hull and the change in structural strength.

[0031] At the same time, this embodiment also has the following advantages:

[0032] 1. Improve structural safety and work efficiency: The proposed universal hydroelastic ship model pool test auxiliary framework significantly enhances the structural stability of the ship model during the hoisting, transportation and equipment installation process through a support structure specially designed for segmented ship models. Compared with the traditional method of installing additional auxiliary steel beams on the ship model, this framework not only reduces the workload of ship model design and construction and on-site disassembly and installation, but also effectively avoids the error in ship model quality debugging caused by the accuracy error of auxiliary steel beam installation, and reduces the risk of damage to the measuring beam. This improvement not only improves work efficiency, but also fundamentally guarantees the structural safety of the ship model during the test, providing a solid foundation for accurate measurement and analysis.

[0033] 2. Optimize the debugging of ship model quality attributes: The auxiliary frame integrates precise measurement and adjustment functions. Especially when the ship model simulates the real ship for inertia adjustment, the frame's built-in precision measurement system can directly and accurately monitor the horizontal state of the ship model frame, without the need to assemble an additional level on the ship model, thus avoiding the problem of inaccurate measurement caused by the relative deviation between the ship model and the measurement frame. This design ensures the accuracy of the ballast position, and thus ensures the accurate correspondence between the weight of each ship model segment and the gravity ratio of the real ship, as well as the consistency of the ship model's swing cycle with the real ship. It is of great significance for in-depth research on the hydroelastic effect of the hull and the change of structural strength, and helps to improve the accuracy and reliability of test data.

[0034] 3. Enhanced versatility and flexibility: The design of the universal hydroelastic ship model tank test auxiliary frame takes into account the needs of segmented ship models of different sizes and types. Its modular structure and adjustable support points enable the frame to adapt to a variety of ship model configurations, greatly enhancing the versatility and flexibility of use. This design not only facilitates the rapid assembly and disassembly of the frame, but also facilitates flexible adjustment according to specific test requirements, reducing the complexity and cost of test preparation. In addition, the durability and reusability of the frame also promote the effective use of resources, which is in line with the pursuit of efficiency and environmental protection in modern scientific research activities, and provides a sustainable support platform for long-term tank test projects. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a schematic diagram of the connection structure between the frame and the ship model during the inertia adjustment process in the present invention.

[0036] Figure 2 It is a three-dimensional diagram of the frame in the present invention.

[0037] Figure 3 It is a stereogram of another viewing angle of the frame in the present invention.

[0038] Figure 4 It is a schematic structural diagram of the vertical support rod in the present invention.

[0039] Figure 5 It is a structural schematic diagram of the ship model in the present invention.

[0040] in:

[0041] 100, frame; 200, ship model;

[0042] 1. Frame support end face; 2. Support beam; 3. Vertical steel beam; 4. Bolt hole; 5. Movable horizontal beam; 6. Built-in bolt hole; 7. Vertical support rod; 8. Horizontal level; 9. Longitudinal level; 10. Knife edge installation interface; 11. Removable universal wheel; 12. Lifting ring; 13. Frame steel ruler and grid line mark; 14. Bottom threaded rod; 15. Middle support rod; 16. Upper buffer head;

[0043] 21. Ship model sections; 22. Measuring beam; 23. Measuring beam support frame; 24. Strain sensor. DETAILED DESCRIPTION

[0044] The specific implementation of this embodiment is described below in conjunction with the accompanying drawings.

[0045] Embodiment 1

[0046] The present embodiment provides a universal auxiliary framework for water tank testing of hydroelastic ship models. The framework 100 is specially designed to adapt to various types of ship models 200 in different test stages, and is intended to provide all-round assistance in structural protection, lifting and transportation, weight adjustment, equipment debugging, and launching of the ship model 200, thereby greatly improving the work efficiency of on-site water tank testing.

[0047] The ship model 200 in this embodiment is as follows Figure 5 As shown, it includes a ship model segment 21 connected head to tail, and multiple ship model segments 21 are connected through the same measuring beam 22, and a measuring beam support frame 23 for reinforcing the measuring beam 22 is also provided in the ship model 200, and a strain sensor 24 is provided at the connection between the measuring beam 22 and the older ship model segment 21.

[0048] The frame 100 is mainly composed of a frame support end surface 1, a movable horizontal beam 5, a vertical support rod 7 and a series of auxiliary devices.

[0049] The frame 100 includes a frame 100 structure composed of a plurality of supporting longitudinal beams 1, a plurality of supporting cross beams 2, and a plurality of vertical steel beams 3. The frame 100 in this embodiment is formed by precision welding of 6 supporting longitudinal beams 1 and 14 supporting cross beams 2 through vertical steel beams 3, forming a strong frame 100 with a length of 6m, a width of 1m, and a height of 0.5m. The supporting cross beams 2 and the vertical steel beams 3 together form a strong frame 100, and the longitudinal spacing between adjacent strong frame 100 sections is 1m, which ensures the stability and load-bearing capacity of the frame 100.

[0050] The design of the frame 100 takes into account various stress conditions during the test, and through precise engineering calculations and optimized design, the safety and reliability of the frame 100 when bearing the weight of the ship model 200 and various test loads are ensured. In addition, the size and shape of the frame 100 can also be customized according to specific test requirements and the size of the ship model 200.

[0051] The movable horizontal beam 5 is connected to the bolt holes 4 built into the longitudinal steel beam 1 on the frame 100 by bolts, which is convenient for disassembly and ensures stability. The movable horizontal beam 5 serves as a supporting base for the vertical support rod 7 and provides a stable supporting platform for the ship model 200.

[0052] The design of the movable horizontal beam 5 fully considers the flexibility and convenience during the test. Through the detachable connection mode, the position of the beam can be quickly adjusted according to the different ship model sections and configurations of the ship model 200 to meet the test requirements of different ship models 200. At the same time, the upper surface of the movable horizontal beam 5 is symmetrically arranged with built-in bolt holes 6 along the longitudinal section of the frame 100, which provides convenience for the connection of the vertical support rod 7.

[0053] The vertical support rod 7 is composed of three parts: a bottom threaded rod 14, a middle support rod 15 and an upper buffer head 16. Its length is determined according to the specific section line of the ship model 200, and is connected to the bolt hole 6 built into the movable horizontal beam 5.

[0054] Length adjustment and combination: The length of the vertical support rod 7 can be adjusted as needed. When the length is within 10 cm, it is only composed of the upper buffer head 16 of customized length; when it is within the range of 10 cm-14 cm, it is composed of the bottom threaded rod 14 and the upper buffer head 16 of customized length; when it is greater than 14 cm, it is composed of the bottom threaded rod 14, the middle support rod 15 and the upper buffer head 16. The threaded rod 14 is connected to the bolt hole 6 by thread. This design realizes the reuse of various components and improves work efficiency.

[0055] Based on actual conditions, the upper buffer head 16 and the bottom threaded rod 14 are detachably connected in the crossbeam bolt hole 6, the upper buffer head 16 and the middle support rod 15 are detachably connected in the bottom threaded rod 14, and the upper buffer head 16 is detachably connected in the middle support rod 15, and the corresponding connection methods are all threaded connections.

[0056] The design of the vertical support rod 7 fully considers the stability and safety of the ship model 200 during the test. The protruding threaded rod design of the bottom threaded rod 14 and the middle support rod 15 and the built-in bolt holes allow the length of the support rod to be flexibly adjusted to meet the requirements of the line of different ship models 200. At the same time, the rubber buffer material of the upper buffer head 16 can effectively protect the ship model 200 from damage during placement and testing.

[0057] At the same time, the present embodiment also includes a horizontal level 8, a vertical level 9, a knife edge installation interface 10, a detachable universal wheel 11, a lifting ring 12, and a frame steel ruler and grid line markings 13.

[0058] A longitudinal level 9 is built into the longitudinal steel beam of the frame 100 at the bow section, the vicinity of the midship section and the stern section; and an internal transverse level 8 is arranged at the bow and stern transverse supports to observe the placement posture of the frame 100;

[0059] A knife edge mounting interface 10 is pre-set at the top longitudinal support of the midsection section of the frame 100 for mounting the knife edge base during inertia adjustment.

[0060] The detachable universal wheels 11 are symmetrically arranged below the port and starboard bottom longitudinal supports at the bow section, L / 4 section, 2L / 4 section, 3L / 4 section and tail section of the frame 100;

[0061] The lifting rings 12 are symmetrically arranged below the longitudinal supports at the port and starboard bottoms of the L / 8 section, the 2L / 8 section, the 6L / 8 section and the 7L / 8 section of the frame 100;

[0062] At the same time, the ship model 200 in this embodiment is segmented at the L / 6 section, 2L / 6 section, 3L / 6 section, 4L / 6 section, and 5L / 6 section. The 6 ship model segment hulls are connected by steel beams. The ship model segment connections of the outer shell of the ship model 200 are connected by rubber to prevent water from entering. At the same time, strain sensors 24 corresponding to each ship model segment are arranged on the steel beams to analyze the stress conditions of each ship model segment. At the same time, a driving device is also arranged in the ship model 200 for driving. At the same time, a counterweight ballast is arranged in the ship model 200 to simulate the actual ship.

[0063] In this embodiment, after the assembly is completed, it is ensured that the mid-longitudinal and mid-transverse sections of the ship model 200 coincide with the mid-longitudinal and mid-transverse sections of the frame 100 respectively.

[0064] At the L / 2 section of the frame 100, frame steel rulers and grid line markers 13 are longitudinally arranged toward the bow and stern of the frame 100, and grid line markers are set at longitudinal intervals of 50 cm and vertical intervals of 10 cm to locate the position for placing the ship model 200.

[0065] The design of the auxiliary device fully considers the convenience and accuracy during the test. The high-precision measurement function of the horizontal level 8 and the longitudinal level 9 can ensure the levelness of the frame 100 during the placement process, thereby ensuring the accuracy of the test results. The design of the knife-edge mounting interface 10 provides a stable base support for the ship model 200 during inertia adjustment. The flexible use of the detachable universal wheel 11 and the lifting ring 12 greatly facilitates the short-distance movement and lifting transportation of the ship model 200 during the test preparation process. The precise scale of the frame steel ruler and grid line mark 13 can help test personnel quickly and accurately locate the position to place the ship model 200, thereby improving test efficiency.

[0066] The frame 100 in this embodiment can change the installation position of the horizontal beam and the length of the vertical support rod according to the ship model segmentation and shell configuration of the ship model 200, so as to adapt to the structural protection of the hydroelastic ship model 200 of various configurations during the whole test cycle;

[0067] The frame 100 in this embodiment is equipped with a lifting ring 12 and a detachable universal wheel 11, which can greatly facilitate the transportation, lifting and launching of the test ship model 200;

[0068] The frame 100 in this embodiment is equipped with a spirit level, a built-in frame steel ruler and grid line markings, which provide a working platform for the onshore equipment installation, debugging and weight adjustment of the test ship model 200, greatly improving the equipment installation accuracy and work efficiency.

[0069] In summary, this embodiment has the following advantages:

[0070] 1. Improve structural safety and operating efficiency: The proposed universal hydroelastic ship model 200 water tank test auxiliary frame 100 significantly enhances the structural stability of the ship model 200 during the hoisting, transportation and equipment installation process through a support structure specially designed for the segmented ship model 200. Compared with the traditional method of installing additional auxiliary steel beams on the ship model 200, this frame 100 not only reduces the workload of designing, building and on-site disassembly and installation of the ship model 200, but also effectively avoids the quality debugging error of the ship model 200 caused by the installation accuracy error of the auxiliary steel beam, and reduces the risk of damage to the measuring beam 22. This improvement not only improves the operating efficiency, but also fundamentally guarantees the structural safety of the ship model 200 during the test, providing a solid foundation for accurate measurement and analysis.

[0071] 2. Enhanced versatility and flexibility: The design of the universal hydroelastic ship model 200 tank test auxiliary frame 100 takes into account the needs of segmented ship models 200 of different sizes and types. Its modular structure and adjustable support points enable the frame 100 to adapt to a variety of ship model 200 configurations, greatly enhancing the versatility and flexibility of use. This design not only facilitates the rapid assembly and disassembly of the frame 100, but also facilitates flexible adjustment according to specific test requirements, reducing the complexity and cost of test preparation. In addition, the durability and reusability of the frame 100 also promote the effective use of resources, which is in line with the pursuit of efficiency and environmental protection in modern scientific research activities, and provides a sustainable support platform for long-term tank test projects.

[0072] Embodiment 2

[0073] The present embodiment discloses a method for using a universal water-elastic ship model 200 water tank test auxiliary frame 100, including steps such as placement and positioning of the ship model 200 and use of auxiliary devices, as shown in Figure 1, which is the main parameters of the ship model 200, and Table 2 is the length of the corresponding vertical support rod 7.

[0074] Physical quantity\state Design Draft <![CDATA[Total length L OA (m)]]> 5.191 <![CDATA[Length L between two columns BP (m)]]> 4.974 Waterline width B(m) 0.761 Depth H(m) 0.396 <![CDATA[Forward draft T f (m)]]> 0.174 <![CDATA[Aft draft T a (m)]]> 0.199 Displacement Δ 0.488

[0075] Table 1 Main parameters of ship model 200

[0076]

[0077]

[0078] Table 2 Length of each vertical support rod

[0079] The method of use in this embodiment includes the following steps:

[0080] S1. Placement and positioning of ship model 200:

[0081] S10. Customize the size and shape of the frame 1001 and the configuration of the movable horizontal beam 5 and the vertical support rod 7 according to the test requirements and the size of the ship model 200.

[0082] S11, according to the parameters of the test ship model 200 and the ship model segmentation, select a suitable transverse section position in the frame 100 to place the movable horizontal beam 5, and ensure that each horizontal beam 5 is located at the center of gravity of each ship model segment of the ship model 200;

[0083] S12, according to the model line of the ship model 200 at a specific section, the position and length of the vertical support rods 7 on each movable horizontal beam 5 are set, and a specific combination of the vertical support rods 7 is selected according to the length value, so as to achieve stable support for the structure, so that the vertical support rods 7 can support the bottom wall of the ship model segment;

[0084] S13, placing the ship model 200 on the vertical support rod 7 in a predetermined manner, so that the middle longitudinal and middle transverse sections of the ship model 200 coincide with the middle longitudinal and middle transverse sections of the frame 100, respectively. Such positioning ensures that the ship model 200 is horizontally placed at the length center of the frame 100;

[0085] S2. Inertia adjustment:

[0086] S21, first use the horizontal level 8 and the vertical level 9 to check the placement of the frame 100 to ensure that the frame 100 is in a horizontal and vertical state, and the ship model 200 is relatively stable relative to the frame 100, so the two levels can ensure that the ship model 200 is in a horizontal state;

[0087] S22, install the blade of the inertia frame on the blade installation interface 10, and at the same time install ballast of corresponding weight on each ship model segment of the ship model 200 according to the corresponding actual ship ratio, the ballast is symmetrically arranged along the longitudinal section of the ship model 200, and longitudinal swing is implemented (that is, swinging along the length direction of the ship model 200), and the ship model 200 is made to pitch freely by applying a small external force, and the free pitching period of the ship model 200 is obtained. The centers of the two groups of loads are on the central axis of the ship model 200, and the free pitching period of the ship model 200 is obtained, and it is judged whether the free pitching period of the ship meets the similarity relationship with the actual ship; if the similarity requirement is not met, the longitudinal position of the cross section in each ballast distance is continuously adjusted until the similarity requirement is met;

[0088] Then, the ship model 200 is swung laterally (i.e., swung along the width direction of the ship model 200), and a small external force is applied to make the ship model 200 roll freely, and the free rolling period of the ship model 200 is obtained to determine whether it satisfies the similarity relationship with the free rolling period of the actual ship. If the similarity requirement is not met, the lateral position of the longitudinal section in each ballast distance is continuously adjusted until the similarity requirement is met. At this time, the swaying period is compared with the swaying period of the actual ship, and then the load on one side is adjusted in the direction perpendicular to the central axis, so as to find the installation position of the load in the direction perpendicular to the central axis of the ship model 200. The actual position of the load can be determined in two directions, which is closer to the actual ship;

[0089] In this embodiment, the order of longitudinal swing and lateral swing is not limited. In this embodiment, the longitudinal swing is performed first and then the lateral swing. In actual use, it can also be the other way around, but they need to be performed in sequence to achieve the corresponding effects.

[0090] S3. Lifting, transportation and placement of ship model 200:

[0091] When the ship model 200 or the frame 100 needs to be lifted and transported, the lifting ring 12 can be connected to the hook for lifting.

[0092] When placing the ship model 200, the frame steel ruler and the grid line mark 13 can be used for accurate positioning to ensure that the ship model 200 is placed in the predetermined position;

[0093] When placed in the test pool, the frame 100 supporting the ship model 200 is sunk into the test pool together, so that the ship model 200 is separated from the frame 100 under the action of buoyancy, and then the two are separated.

[0094] By setting up the present frame 100, support is provided from the bottom to ensure that each ship model segment of the ship model 200 will not be subjected to additional external force, which is specifically reflected in the strain sensors 24 connected to each ship model segment and the steel beam. When the value of the strain sensor 24 is very small and close to 0, it means that each ship model segment will not be subjected to additional force. In this embodiment, the frame 100 is adaptively adjusted according to the shape of the ship model 200, thereby ensuring that the measuring beam 22 is subjected to a smaller external load before the test is launched into the water, thereby avoiding the impact of a large load on the measuring beam 22, causing a large deformation of the measuring beam 22 and damage to the strain sensor 24 arranged above, which affects the quality of the test data.

[0095] Different from the prior art, if the ship model 200 is under reasonable protection conditions, the initial value of the stress is small, the measuring beam 22 is in an elastic deformation state, and the stress sensor will not be damaged.

[0096] When conducting stress measurements after entering the water, the stress will first be reset to zero, and then the subsequent wave loads will be measured.

[0097] However, if the measuring beam 22 of the ship model segment is hoisted directly or indirectly, the measuring beam 22 may bear a large load, which may damage the strain sensor 24 thereon, affecting the accuracy of data collected in subsequent tests.

[0098] In this embodiment, the frame 100 provides a stable support platform, ensuring the safety and stability of the ship model 200 during the test. At the same time, the use of the auxiliary device also greatly facilitates the preparation and implementation of the test.

[0099] The design of the movable horizontal beam 5 and the vertical support rod of the auxiliary frame 100 makes the test preparation process of the segmented ship model 200 more flexible and convenient. At the same time, the use of auxiliary devices also improves the efficiency of test preparation and implementation. The test results show that the overall performance of the segmented ship model 200 and the connection strength between the segments meet the design requirements.

[0100] The design of the frame 100 and the movable horizontal beam 5 of the auxiliary frame 100 enables it to adapt to ship models 200 of different configurations. At the same time, the length and position of the vertical support rod can also be adjusted as needed, further improving the adaptability of the auxiliary frame 100. The test results show that the auxiliary frame 100 has good support and positioning capabilities for ship models 200 of different configurations.

[0101] In summary, the method of use in this embodiment can optimize the debugging of the mass attributes of the ship model 200: the auxiliary frame 100 integrates precise measurement and adjustment functions, especially when the ship model 200 simulates the actual ship for debugging the mass attributes, the horizontal state of the ship model 200 can be directly and accurately monitored through the precision measurement system built into the frame 100, without the need to assemble an additional level on the ship model 200, thereby avoiding the problem of inaccurate measurement caused by the relative deviation between the ship model 200 and the measurement frame 100. This design ensures the accuracy of the ballast position, and further ensures the accurate correspondence between the weight of each ship model segment of the ship model 200 and the mass ratio of the actual ship, as well as the consistency between the natural period of the ship model 200 and the actual ship, which is of great significance for in-depth research on the hydroelastic effect of the hull and helps to improve the accuracy and reliability of the test data.

[0102] The above description is an explanation of the present embodiment, not a limitation of the invention. The scope defined in the present embodiment can be found in the claims. Any form of modification can be made within the protection scope of the present embodiment.

Claims

1. A general auxiliary framework for hydroelastic ship model tank testing, characterized in that: include: A frame, comprising a plurality of supporting longitudinal beams (1), a plurality of supporting transverse beams (2) and a plurality of vertical steel beams (3), for providing overall structural support; A movable horizontal beam (5) which can be adjusted in longitudinal position horizontally by bolts and is connected to the frame support end surface, used to support the vertical support rod (7) and provide flexible adjustment of the beam position; A plurality of vertical support rods (7) having an adjustable length for compensating for the vertical distance between the corresponding point of the ship model and the frame, and for supporting the ship model and ensuring its stability; The horizontal level (8) and the vertical level (9) are arranged at different positions of the frame and are used to monitor the frame posture information.

2. A general-purpose auxiliary framework for water tank testing of hydroelastic ship models as claimed in claim 1, characterized in that: The vertical support rod (7) comprises an upper buffer head (16) or a combination structure of a bottom threaded rod (14) and an upper buffer head (16), or a combination structure of a bottom threaded rod (14), a middle support rod (15) and an upper buffer head (16), so as to achieve different length adjustments.

3. A general-purpose auxiliary framework for water tank testing of hydroelastic ship models as claimed in claim 2, characterized in that: The upper buffer head (16) and the bottom threaded rod (14) are detachably connected in the crossbeam bolt hole (6), the upper buffer head (16) and the middle support rod (15) are detachably connected in the bottom threaded rod (14), the upper buffer head (16) is detachably connected in the middle support rod (15), and a rubber buffer material is arranged at the upper end of the upper buffer head (16).

4. A general-purpose auxiliary frame for a hydroelastic ship model tank test as claimed in any one of claims 1 to 3, characterized in that: Also includes: A knife edge mounting interface (10) is used for mounting the knife edge base during inertia adjustment; The detachable universal wheel (11) and the lifting ring (12) are used to facilitate the transportation and hanging of the ship model; The frame steel ruler and grid line marking (13) are used to quickly and accurately locate the position during the installation and commissioning of the test ship model equipment.

5. A general-purpose auxiliary framework for water tank testing of hydroelastic ship models as claimed in claim 4, characterized in that: The mid-longitudinal and mid-transverse sections of the ship model coincide with the mid-longitudinal and mid-transverse sections of the frame respectively.

6. A method for using a universal hydroelastic ship model tank test auxiliary frame, characterized in that: The auxiliary framework for using a universal hydroelastic ship model tank test disclosed in claim 5 comprises the following steps: S1. Ship model placement and positioning: according to the ship model parameters and the ship model segmentation, a suitable position is selected to place the movable horizontal beam (5), and the position and length of the vertical support rod (7) are set, and the ship model is placed on the vertical support rod (7) so that the middle longitudinal and middle transverse sections of the ship model coincide with the middle longitudinal and middle transverse sections of the frame respectively; S2, inertia adjustment: Use the transverse level (8) and the longitudinal level (9) to check the frame posture, install the knife-edge installation interface (10), measure the roll and pitch natural periods of the ship model through the inertia frame, compare them with the corresponding periods of the actual ship, and continuously adjust the position of the corresponding ballast of the ship model until the corresponding natural period of the ship model matches that of the actual ship; S3. Hoisting, transporting and placing the ship model: Use the lifting ring (12) to lift and sink the frame supporting the ship model into the test pool, so that the ship model is separated from the frame under the action of buoyancy.

7. The method for using a universal hydroelastic ship model tank test auxiliary frame according to claim 6, characterized in that: The method also includes ensuring in step S1 that the movable horizontal beam (5) is located at the center of gravity of each ship model segment to improve the support stability and test accuracy.

8. The method for using a universal hydroelastic ship model water tank test auxiliary frame as claimed in claim 6, characterized in that: The method further includes using a high-precision measuring tool in conjunction with a transverse level (8) and a longitudinal level (9) in step S2 to ensure the horizontality of the frame and the ship model, and adjusting the load position by respectively implementing free pitching and free roll to ensure that the mass distribution of the ship model is close to that of the actual ship.

9. The method for using a universal hydroelastic ship model water tank test auxiliary frame according to claim 6, characterized in that: It also includes in step S3 that before the ship model is launched into the water, the grid line markings of the frame steel ruler and the grid line markings (13) are used to quickly and accurately locate the position during the installation and commissioning of the test ship model equipment.

10. The method for using a universal hydroelastic ship model water tank test auxiliary frame according to claim 6, characterized in that: It also includes customizing the size and shape of the frame (100), as well as the configuration of the movable horizontal beam (5) and the vertical support rod (7) according to the test requirements and the size of the ship model before step S1.

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