A ship for ship strength experimental teaching with adjustable section modulus

Abstract

The present invention relates to a ship strength experimental teaching ship with adjustable section modulus, which comprises a ship model, a force-applying component and a force-measuring component; the ship model comprises a hull and a profile unit, the middle part of the hull is provided with an inwardly recessed installation groove, the extension direction of the installation groove is the same as the length direction of the hull, the profile unit can be built into any position of the installation groove and can be detachably connected to the hull; the force-applying end of the force-applying component is connected to the hull to apply external force to the hull; the force-measuring end of the force-measuring component can be connected to the hull to detect the force at the connection; the problem that the existing teaching ship cannot effectively simulate the force test at different positions of the ship and under different profiles is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of experimental teaching, and particularly relates to a ship for ship strength experimental teaching with adjustable section modulus. Background Art

[0002] The hull strength refers to the ability of the hull structure of a ship to not be damaged or undergo excessive deformation during normal use and within a certain service life. Studying the hull strength is to ensure that the designed and built ship can sail safely while having a more economical structure and better constructability when encountering various external forces that it may encounter. During the process of studying the hull strength, the hull is usually regarded as a floating hollow thin-walled beam (referred to as the hull girder), and its deformation law and the ability to resist damage are studied as a whole, which is the study of the overall strength. Since the hull mainly undergoes longitudinal bending deformation, the above study of the overall strength is to study the longitudinal bending problem of the hull girder. After obtaining the total longitudinal bending moment of the hull, the total longitudinal bending stress of the hull can be calculated for strength verification.

[0003] The hull section modulus is a geometric property that characterizes the ability of the hull structure to resist bending deformation and is also an important standard for measuring the overall longitudinal strength of the hull. In general construction specifications, the basic requirements for the section modulus are stipulated as the standard for measuring the overall longitudinal strength of the hull. How to design the section and select profiles to ensure sufficient hull strength and how to obtain a lighter ship that meets the structural strength requirements are issues that must be considered in ship structure design.

[0004] For example, a ship complex model for nautical teaching equipment proposed in the invention application with the application number CN201911139644.8 includes a ship main body, on which there are hoisting equipment, a first hatch cover, a second hatch cover, a third hatch cover, a fourth hatch cover, a fifth hatch cover, an anchor winch, an anchor, a side thruster, an engine propeller, an engine for driving the engine propeller, a mast, signal lights and tail lights, life-saving equipment and a radar, and a cockpit. The ship main body is connected to a wind and wave simulation device. Circuit lines are arranged in the deck keel of the ship main body, and the circuit lines are connected to a console. The console controls the signal lights, tail lights, anchor winch, side thruster, engine, hoisting equipment and wind and wave simulation device through the circuit lines.

[0005] However, the above ship model and the ships used in many current ship strength and structure design courses in universities are all of an integral structure and cannot effectively simulate the force tests at different positions and with different profiles of the ship. Summary of the Invention

[0006] In view of this, it is necessary to provide a ship strength experimental teaching ship with adjustable section modulus to solve the problem of being unable to effectively simulate stress tests at different positions and under different profiles of the ship.

[0007] The present invention provides a ship for ship strength experimental teaching with adjustable section modulus, comprising a ship model, a force-applying component and a force-measuring component; the ship model comprises a hull and a profile unit, the middle part of the hull is provided with an inwardly recessed installation groove, the extension direction of the installation groove is the same as the length direction of the hull, the profile unit can be built into any position of the installation groove and can be detachably connected to the hull; the force-applying end of the force-applying component is connected to the hull to apply external force to the hull; the force-measuring end of the force-measuring component can be connected to the hull to detect the force at the connection.

[0008] Furthermore, the shape of the installation groove of the hull is adapted to the outer shape of the profile unit, and the profile unit can be inserted into the installation groove and detachably connected to the hull via a connecting piece.

[0009] Furthermore, the profile unit includes a frame and a plurality of profile monomers, the frame is inserted into the mounting groove, the plurality of profile monomers are fixedly connected to the inner wall of the frame, the frame is slidably connected to the mounting groove along its length direction so as to slide to any position of the mounting groove, and the frame is detachably connected to the hull via the connecting piece.

[0010] Furthermore, there are multiple profile units, and the multiple profile units are built into the installation groove along the length direction of the installation groove.

[0011] Furthermore, it also includes a plurality of limit members arranged in sequence along the length direction of the installation groove, and the plurality of limit members each include a slider, a spring and a limit bead. The slider is fixedly connected to the inner wall of the installation groove of the hull, and the side of the slider close to the profile unit is connected to the limit bead via the spring. A positioning groove is opened on the side wall of the profile unit, and the positioning groove of the profile unit can be clamped with any one of the limit beads.

[0012] Furthermore, the force-applying assembly has two force-applying ends, which are respectively located on both sides of the mounting groove of the hull, and each of the force-applying ends includes a handwheel, a screw, a top plate and a door frame. The handwheel is fixedly connected to one end of the screw, the other end of the screw is connected to the top plate, the screw is rotatably connected to the door frame, and the top plate abuts against the hull.

[0013] Further, the top plate abuts against the hull via a force distribution plate; the force application end further includes a force value display, the force value display is fixedly arranged on the side wall of the hull, and the measuring end of the force value display is arranged between the top plate and the force distribution plate.

[0014] Further, the force measuring assembly includes a strain gauge, a strain indicator and a computer. The strain gauge is connected to the outer wall of the hull, the strain gauge is electrically connected to the strain indicator, and the strain indicator is electrically connected to the computer.

[0015] Further, the number of the strain gauges is multiple, and the multiple strain gauges are bonded to the hull.

[0016] Further, it further includes a base, two gantries are fixedly arranged on the base, two supports are fixedly connected to the base, and the two supports abut against the bottom of the hull; a ball is fixedly connected to the top of the support, and the bottom of the hull is in sliding contact with the ball.

[0017] Compared with the prior art, by changing the integral structure of the existing ship model to a split structure. Specifically, the ship model includes a hull and profile units, where the profile units can be installed at any position of the hull, the profile units are detachably connected to the hull, and the profile units can simulate the cross-sectional structure of the hull. Taking out the profile units separately is convenient for observing and studying the internal structure of the hull. By changing the thickness, structure and installation position of the profile units, it is convenient to simulate the stress tests at different positions of the hull and under different profiles. Students can independently participate in the design of the ship cross-sectional structure and complete rapid assembly in the laboratory, which can more effectively stimulate students' experimental enthusiasm and learning interest, is more conducive to students' understanding of the structural strength of the hull, enriches the content of experimental teaching, and solves the shortcomings of the traditional hull girder model with a single structure, dull experimental content and poor teaching effect. Description of the Drawings

[0018] Figure 1 It is a schematic diagram of the overall structure in this embodiment of a ship for ship strength experimental teaching with adjustable section modulus provided by the present invention;

[0019] Figure 2 It is a schematic diagram of the structure of the ship model in this embodiment of a ship for ship strength experimental teaching with adjustable section modulus provided by the present invention;

[0020] Figure 3 It is a schematic diagram of the structure of the profile unit in this embodiment of a ship for ship strength experimental teaching with adjustable section modulus provided by the present invention;

[0021] Figure 4Another structural schematic diagram of the section modulus adjustable ship for ship strength experiment teaching provided by the present invention;

[0022] Figure 5 Structural schematic diagram of the connection between the frame and the hull through a limiting member in this embodiment of the section modulus adjustable ship for ship strength experiment teaching provided by the present invention;

[0023] Figure 6a Structural schematic diagram of the first longitudinal girder in this embodiment of the section modulus adjustable ship for ship strength experiment teaching provided by the present invention;

[0024] Figure 6b Structural schematic diagram of the second longitudinal girder in this embodiment of the section modulus adjustable ship for ship strength experiment teaching provided by the present invention;

[0025] Figure 6c Structural schematic diagram of the third longitudinal girder in this embodiment of the section modulus adjustable ship for ship strength experiment teaching provided by the present invention;

[0026] Figure 6d Structural schematic diagram of the fourth longitudinal girder in this embodiment of the section modulus adjustable ship for ship strength experiment teaching provided by the present invention;

[0027] Figure 7 Another structural schematic diagram of the section modulus adjustable ship for ship strength experiment teaching provided by the present invention;

[0028] Figure 8 Another structural schematic diagram of the section modulus adjustable ship for ship strength experiment teaching provided by the present invention. Detailed implementation manners

[0029] The following will specifically describe the preferred embodiments of the present invention in conjunction with the accompanying drawings. The accompanying drawings form a part of this application and are used together with the embodiments of the present invention to explain the principles of the present invention, rather than to limit the scope of the present invention.

[0030] As Figure 1-2As shown in the figure, a ship strength experiment teaching ship with adjustable section modulus in this embodiment includes a ship model 100, a force application component 200, and a force measurement component 300; the ship model 100 includes a hull 110 and a profile unit 120. An inwardly concave installation groove 111 is formed in the middle part of the hull 110. The extending direction of the installation groove 111 is the same as the length direction of the hull 110. The profile unit 120 can be placed at any position in the installation groove 111 and is detachably connected to the hull 110; the force application end 210 of the force application component 200 is on the hull 110 to apply an external force to the hull 110; the force measurement end of the force measurement component 300 can be connected to the hull 110 to detect the force at the connection.

[0031] Among them, by changing the integral structure of the existing ship model 100 to a split structure. Specifically, the ship model 100 includes a hull 110 and a profile unit 120. The profile unit 120 can be installed at any position of the hull 110. The profile unit 120 is detachably connected to the hull 110. The profile unit 120 can simulate the cross-sectional structure of the ship model 100. Taking out the profile unit 120 alone is convenient for observing and studying the internal structure of the hull 110. By changing the thickness, structure, and installation position of the profile unit 120, it is convenient to simulate the force tests at different positions of the hull 110 and under different profiles. Students can independently participate in the design of the ship's cross-sectional structure, complete rapid assembly in the laboratory, which can more effectively stimulate students' experimental enthusiasm and learning interest, and is more conducive to students' understanding of the structural strength of the hull 110, enriching the content of experimental teaching, and solving the shortcomings of the traditional hull 110 beam model with a single structure, dull experimental content, and poor teaching effect.

[0032] In this implementation scheme, the shape of the installation groove 111 of the hull 110 is adapted to the outer shape of the profile unit 120. The profile unit 120 can be inserted into the installation groove 111 and is detachably connected to the hull 110 through a connecting piece. Among them, the hull 110 is the main body of the entire ship model 100, and the profile unit 120 is a part of the main body of the ship model 100. The two are detachably connected. When connected, the profile unit 120 and the hull 110 form the ship model 100. When disassembled, the profile unit 120 can be taken out alone, which is convenient for simulating and studying the cross-sectional structure of the ship model 100.

[0033] In a preferred embodiment, as Figure 3 shown, the profile unit 120 includes a frame body 121 and a plurality of profile monomers 122. The frame body 121 is inserted into the installation groove 111. The plurality of profile monomers 122 are fixedly connected to the inner wall of the frame body 121. The frame body 121 is slidably connected to the installation groove 111 along its length direction to slide to any position in the installation groove 111. The frame body 121 is detachably connected to the hull 110 through a connecting piece.

[0034] Among them, the frame body 121 is used to connect with the hull 110, and a plurality of profile monomers 122 installed inside it are used to simulate the ship model 100. The shape of the profile monomer 122 can be adopted as Figure 6a , Figure 6b , Figure 6c and Figure 6d the shapes of the first longitudinal girder 122a, the second longitudinal girder 122b, the third longitudinal girder 122c, and the fourth longitudinal girder 122d shown in. Of course, in other preferred embodiments, the shape of the profile monomer 122 is not limited, and it is preferred to simulate the cross-sectional structure of the ship model 100.

[0035] It should be noted that the above-mentioned profile monomer 122 is used to simulate the structures of the deck longitudinal girder, the ship side longitudinal girder, and the ship bottom longitudinal girder of the ship.

[0036] During the operation, by splicing profile monomers 122 with different shapes onto the frame body 121, the cross-sectional structure of different shapes of the ship model 100 required can be freely assembled to study the most suitable cross-sectional structure and combination. For example, it can form the structure of the profile unit 120 as shown in Figure 7 , Figure 8 . By designing different profile units 120 and different combinations of the distances between different profile units 120, the ship's cross-section is changed, thereby changing the section modulus of the mid-span structure of the installation groove 111 part of the hull 110.

[0037] In order to make the connection between the frame body 121 and the hull 110 more stable, as shown in Figure 4 , a plurality of limiting grooves 121a are opened along the extending direction of the frame body 121. A limiting rod is slidably connected to the hull 110 along its length direction, and the limiting rod is slidably connected to one of the limiting grooves 121a. The limiting rod can simulate the transverse structure of the ship model 100.

[0038] Among them, the frame body 121 and the hull 110 are detachably connected via a connecting piece. In a preferred embodiment, the connecting piece includes a connecting screw, and the frame body 121 and the hull 110 are detachably connected via the connecting screw. Of course, in other preferred embodiments, other forms of structures can also be used to replace the connecting piece, such as snap fasteners, etc.

[0039] Among them, in order to facilitate the assembly of different profile units 120 to test the most preferred scheme of the cross-sectional structure of the ship model 100, the frame body 121 and the profile unit 120 can also be detachably connected by using the above-mentioned connecting piece. Specifically, a plurality of threaded holes are sequentially opened along the extending direction of the frame body 121, and the profile unit 120 can be threadedly connected to any one of the threaded holes via a connecting screw.

[0040] To achieve more combination methods, in a preferred embodiment, the number of profile units 120 is multiple, and the multiple profile units 120 are built into the installation groove 111 along the length direction of the installation groove 111.

[0041] To facilitate the profile unit 120 being fixed to any position of the installation groove 111 during the sliding process in the installation groove 111, in a preferred embodiment, as Figure 5 shown, it further includes a plurality of limiting members 123 arranged in sequence along the length direction of the installation groove 111. The plurality of limiting members 123 each include a slider 123a, a spring 123b, and a limiting bead 123c. The slider 123a is fixedly connected to the inner wall of the installation groove 111 of the hull 110. One side of the slider 123a close to the profile unit 120 is connected to the limiting bead 123c via the spring 123b. A positioning groove 121c is formed on the side wall of the profile unit 120, and the positioning groove 121c of the profile unit 120 can be engaged with any one of the limiting beads 123c.

[0042] Wherein, the side wall of the frame body 121 is bent outward to form an L-shaped sliding groove 121b. As Figure 5 shown, the slider 123a is slidably connected to the sliding groove 121b.

[0043] When the profile unit 120 slides to a predetermined position of the installation groove 111, the limiting bead 123c abuts in the positioning groove 121c, facilitating the fixing work between the profile unit 120 and the hull 110.

[0044] In a preferred embodiment, there are two force application ends 210 of the force application assembly 200. The two force application ends 210 are respectively located on both sides of the installation groove 111 of the hull 110. The two force application ends 210 each include a screw 211, a top plate 212, a handwheel 213, and a gantry 220. The handwheel 213 is fixedly connected to one end of the screw 211. The other end of the screw 211 is connected to the top plate 212. The screw 211 is rotatably connected to the gantry 220. The top plate 212 abuts against the hull 110. By rotating the handwheel 213, the screw 211 is driven to rotate, and through the threaded connection between the screw 211 and the gantry 220, the top plate 212 is driven to press the hull 110, thereby applying an external force to the hull 110.

[0045] To facilitate the uniform distribution of the pressure on the hull 110 by the top plate 212, in a preferred embodiment, the top plate 212 abuts against the hull 110 via a force distribution plate. Wherein, the area of the force distribution plate is larger than the area of the top plate 212. By increasing the contact surface with the hull 110, the force on the hull 110 is made uniform.

[0046] In order to facilitate the control of the magnitude of the external force applied to the hull 110, in a preferred embodiment, the force application end 210 further includes a force value display, which is fixedly arranged on the side wall of the hull 110, and the measuring end of the force value display is arranged between the top plate 212 and the force distribution plate.

[0047] The load magnitude can be adjusted by the handwheel 213. Observe the force value display connected to the force sensor to ensure that the loads applied at both ends are equal. At this time, the stress state of the middle part of the hull 110 is pure bending.

[0048] In a preferred embodiment, the force measuring assembly 300 includes a strain gauge 310, a strain indicator 320, and a computer 330. The strain gauge 310 is connected to the outer wall of the hull 110, the strain gauge 310 is electrically connected to the strain indicator 320, and the strain indicator 320 is electrically connected to the computer 330.

[0049] Among them, the number of strain gauges 310 is multiple, and the multiple strain gauges 310 are bonded to the hull 110. During use, the strain gauge 310 is a disposable item. In the next force measurement work, a new strain gauge 310 can be connected to the strain indicator 320. Of course, in other preferred embodiments, the above force measuring assembly 300 can also be replaced by other forms of structures.

[0050] It can be understood that the above strain gauge 310 and strain indicator 320 are structures that can be thought of by those skilled in the art, and no further elaboration and description will be made here.

[0051] In order to facilitate the fixation of the hull 110 and the force application assembly 200, in a preferred embodiment, a base 400 is further included. Two gantries 220 are fixedly arranged on the base 400. Two supports 410 are fixedly connected to the base 400. The two supports 410 are in contact with the bottom of the hull 110. A ball is fixedly connected to the top of the support 410, and the bottom of the hull 110 is in sliding contact with the ball.

[0052] In a preferred embodiment, scales are marked on the outer plate of the hull 110 for recording the positions of profiles.

[0053] Compared with the prior art: by changing the integrated structure of the existing ship model 100 into a split structure, specifically, the ship model 100 includes a hull 110 and a profile unit 120, wherein the profile unit 120 can be installed at any position of the hull 110, the profile unit 120 and the hull 110 are detachably connected, the profile unit 120 can simulate the cross-sectional structure of the hull 110, and the profile unit 120 can be taken out separately, which is convenient for observing and studying the internal structure of the hull 110, and the thickness, structure and installation position of the profile unit 120 can be changed to simulate different positions of the hull 110 and stress tests under different profiles, students can independently participate in designing the cross-sectional structure of the ship and complete rapid assembly in the laboratory, which can better stimulate students' experimental enthusiasm and learning interest, and is more conducive to students' understanding of the structural strength of the hull 110, enriching the content of experimental teaching, and solving the shortcomings of the traditional hull beam model, such as the single structure, rigid experimental content and poor teaching effect.

[0054] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by any technician familiar with the technical field within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

Claims

1. A ship for ship strength experimental teaching with adjustable section modulus, characterized in that, It includes a ship model, a force applying component and a force measuring component; The ship model includes a hull and a profile unit, wherein an inwardly recessed installation groove is provided in the middle portion of the hull, wherein the extension direction of the installation groove is the same as the length direction of the hull, and the profile unit can be built into any position of the installation groove and can be detachably connected to the hull; The force applying component has a force applying end for applying external force to the hull; The force measuring end of the force measuring assembly can be connected to the hull to detect the force at the connection; The profile unit includes a frame and a plurality of profile monomers, the frame is inserted into the installation groove, the plurality of profile monomers are fixedly connected to the inner wall of the frame, the frame is slidably connected to the installation groove along the length direction thereof, so as to slide to any position of the installation groove, and the frame is detachably connected to the hull via a connecting piece; It also includes a plurality of limit members arranged in sequence along the length direction of the installation groove, and the plurality of limit members each include a slider, a spring and a limit bead. The slider is fixedly connected to the inner wall of the installation groove of the hull, and the side of the slider close to the profile unit is connected to the limit bead via the spring. A positioning groove is opened on the side wall of the profile unit, and the positioning groove of the profile unit can be clamped with any one of the limit beads.

2. The ship for ship strength experiment teaching with adjustable section modulus according to claim 1, characterized in that, The shape of the installation groove of the hull is adapted to the outer shape of the profile unit. The profile unit can be inserted into the installation groove and detachably connected to the hull through a connecting piece.

3. The ship for ship strength experiment teaching with adjustable section modulus according to claim 1, characterized in that, There are multiple profile units, and the multiple profile units are built into the installation groove along the length direction of the installation groove.

4. The ship for ship strength experiment teaching with adjustable section modulus according to claim 1, characterized in that, The force-applying assembly has two force-applying ends, which are respectively located on both sides of the mounting groove of the hull. The two force-applying ends include a handwheel, a screw rod, a top plate and a door frame. The handwheel is fixedly connected to one end of the screw rod, the other end of the screw rod is connected to the top plate, the screw rod is rotatably connected to the door frame, and the top plate abuts against the hull.

5. The ship for ship strength experiment teaching with adjustable section modulus according to claim 4, characterized in that, The top plate abuts against the hull via a force distribution plate; The force-applying end further comprises a force value display, which is fixed on the side wall of the hull, and a measuring end of the force value display is arranged between the top plate and the force distribution plate.

6. The ship for ship strength experiment teaching with adjustable section modulus according to claim 1, characterized in that, The force measuring assembly comprises a strain gauge, a strain meter and a computer. The strain gauge is connected to the outer wall of the hull, the strain gauge is electrically connected to the strain meter, and the strain meter is electrically connected to the computer.

7. The ship for ship strength experiment teaching with adjustable section modulus according to claim 6, characterized in that, There are multiple strain gauges, and the multiple strain gauges are bonded to the hull.

8. The ship for ship strength experiment teaching with adjustable section modulus according to claim 4, characterized in that, It also includes a base, the two door frames are fixedly arranged on the base, the base is fixedly connected with two supports, and the two supports are in contact with the bottom of the hull; A ball is fixedly connected to the top of the support, and the bottom of the hull is in sliding contact with the ball.

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