Floating icebreaking simulation test device for large-scale icebreaking structure model

Abstract

The invention relates to a floating icebreaking simulation test device for a large-scale icebreaking structure model, which comprises a base platform, a plurality of pressurizing mechanisms are fixed at the top of the base platform at intervals, and pressure is applied to a typical icebreaking structure through the pressurizing mechanisms; each pressurizing mechanism structurally comprises an electro-hydraulic servo loading actuator, the output end of the electro-hydraulic servo loading actuator is connected with the working end face of an input pressure head, the input pressure head and one end of a lever cross beam are rotationally installed, the other end of the lever cross beam and an output pressure head are rotationally installed, and the working end face of the output pressure head is fixed to the top end face of a distribution beam. The two ends of the bottom end face of the distribution beam are provided with a fixed hinge support and a sliding support in a matched mode respectively. The device can be used for simulating the stress state of a typical icebreaking structure of an underwater vehicle under a floating icebreaking working condition, collecting strain response data and deformation response data of the typical icebreaking structure under the action of a distributed ice load, and obtaining the ultimate bearing capacity breaking pressure and the breaking form of the typical icebreaking structure.

Description

Technical Field

[0001] The invention relates to the technical field of polar icebreaking, in particular to a floating icebreaking simulation test device for a large-scale icebreaking structure model. Background Art

[0002] The Arctic ice layer serves as a natural barrier and can greatly improve the acoustic stealth performance of underwater vehicles. However, the existence of the ice layer also poses a great challenge to the structural safety of underwater vehicles when they surface. Therefore, the ability to surface and break ice is an important indicator for assessing the vitality and combat effectiveness of underwater vehicles in polar regions.

[0003] At present, the research on underwater vehicles that can float and break ice in polar regions is still in its infancy. Due to the great difficulty in preparing, collecting and transferring thick ice plates, the research methods mainly include numerical simulation and rigid body model tests of small-thickness ice plates combined with small-scale ice-breaking structures. Numerical simulation can simulate the interaction between the underwater vehicle's ice-breaking structure and the ice plates during the entire process of floating and breaking ice, but the reliability of the calculation results is difficult to guarantee; the rigid body model test of small-thickness ice plates combined with small-scale ice-breaking structures can obtain the ice resistance and failure mode of the underwater vehicle's ice-breaking structure during the floating and breaking ice process, but it is impossible to obtain the strain and deformation response data of the underwater vehicle's ice-breaking structure, and it is impossible to provide data support for the optimization design of the underwater vehicle's ice-breaking structure. Summary of the invention

[0004] In view of the shortcomings in the above-mentioned existing production technologies, the applicant provides a floating icebreaking simulation test device for a large-scale icebreaking structure model. By setting a pressurizing mechanism, it can be used to simulate the stress state of a typical icebreaking structure of an underwater vehicle under a floating icebreaking condition, collect the strain response data and deformation response data of the typical icebreaking structure under the action of distributed ice loads, and obtain the ultimate bearing capacity failure pressure and failure form of the typical icebreaking structure.

[0005] The technical solution adopted by the present invention is as follows:

[0006] A floating icebreaking simulation test device for a large-scale icebreaking structure model comprises a base platform, a plurality of pressurizing mechanisms are fixed at intervals on the top of the base platform, and pressure is applied to a typical icebreaking structure through the pressurizing mechanisms, thereby simulating the floating icebreaking working condition of the typical icebreaking structure;

[0007] The structure of a single pressurizing mechanism is as follows: it includes a vertically placed electro-hydraulic servo loading actuator, the output end of the electro-hydraulic servo loading actuator is connected to the working end face of the input pressure head, the input pressure head is rotatably mounted on one end of the lever crossbeam, the other end of the lever crossbeam is rotatably mounted on the output pressure head, the working end face of the output pressure head is fixed to the top end face of the distribution beam, and the two ends of the bottom end face of the distribution beam are respectively matched with a fixed hinge support and a sliding support;

[0008] In a single pressurizing mechanism, the electro-hydraulic servo loading actuator extends to apply a load to the input pressure head, and transfers the load on the input pressure head to the output pressure head through the lever beam, thereby applying a load to the distribution beam through the output pressure head, and then driving the corresponding fixed hinge support and sliding support to apply a load to the typical icebreaking structure.

[0009] As a further improvement of the above technical solution:

[0010] In a single pressurizing mechanism, a plurality of pads are mounted on the bottoms of the fixed hinge support and the sliding support.

[0011] In a single pressurizing mechanism, the sliding support is detachably installed on the distribution beam through pins. By adjusting the installation position of the sliding support on the distribution beam, the horizontal distance between the sliding support and the output pressure head is adjusted, thereby changing the distribution ratio of the load output by the output pressure head between the sliding support and the fixed hinge support.

[0012] In a single pressurizing mechanism, the input pressure head is rotatably mounted via a first hinge shaft and a corresponding end of a lever beam, and the output pressure head is rotatably mounted via a second hinge shaft and a corresponding end of the lever beam.

[0013] In a single pressurizing mechanism, a supporting vertical beam is mounted in cooperation with the middle portion of the lever crossbeam, and the supporting vertical beam supports the lever crossbeam.

[0014] In a single pressurizing mechanism, the supporting vertical beam is rotatably mounted with the lever cross beam via a third hinge shaft.

[0015] In a single pressurizing mechanism, the working end surface of the input pressure head and the working end surface of the output pressure head are both planar.

[0016] In a single pressurizing mechanism, the electro-hydraulic servo loading actuator and the base platform, and the typical ice-breaking structure and the base platform are both mounted by means of a plurality of bolts.

[0017] In a single pressurizing mechanism, the input end of the electro-hydraulic servo loading actuator is connected to a hydraulic source.

[0018] The invention also comprises a plurality of displacement sensors and a plurality of strain sensors, wherein the displacement sensors are used to measure the displacement of a typical ice-breaking structure, and the strain sensors are used to measure the strain of a typical ice-breaking structure.

[0019] The beneficial effects of the present invention are as follows:

[0020] The present invention has a compact and reasonable structure and is easy to operate. By setting a pressurizing mechanism, it can realize the equivalent loading of quasi-static ice loads and obtain the strain response and deformation response of a typical icebreaking structure of an underwater navigation body under the equivalent ice load. By comparing with the simulation results, the reliability of the numerical simulation results and the feasibility of the load equivalence method can be verified.

[0021] The present invention can amplify the output load of the electro-hydraulic servo loading actuator by arranging a lever crossbeam, thereby realizing the overall crushing of a typical icebreaking structure and obtaining its ultimate bearing capacity destruction pressure and destruction form; by arranging a distribution beam, a fixed hinge support and a sliding support, the output load of a limited number of output pressure heads can be distributed, thereby simulating the regional differences of the equivalent ice load. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the structure of the present invention.

[0023] Figure 2 It is a cross-sectional view of section AA in the figure.

[0024] Figure 3 for Figure 2 A partial enlarged view of point A in the middle.

[0025] Figure 4 It is a top view of the present invention.

[0026] Among them: 1. Base platform; 2. Typical ice-breaking structure; 3. Electro-hydraulic servo loading actuator; 4. Bolts; 5. Input pressure head; 6. Output pressure head; 7. First hinge shaft; 8. Second hinge shaft; 9. Lever beam; 10. Support vertical beam; 11. Distribution beam; 12. Fixed hinge support; 13. Sliding support; 14. Third hinge shaft; 15. Pad. DETAILED DESCRIPTION

[0027] The specific implementation of the present invention will be described below in conjunction with the accompanying drawings.

[0028] like Figure 1-Figure 4As shown, the floating icebreaking simulation test device for the large-scale icebreaking structure model of the present embodiment includes a base platform 1, and a plurality of pressurizing mechanisms are fixed at intervals on the top of the base platform 1, and pressure is applied to the typical icebreaking structure 2 by the pressurizing mechanism, so as to simulate the floating icebreaking working condition of the typical icebreaking structure 2; the structure of a single pressurizing mechanism is as follows: it includes a vertically placed electro-hydraulic servo loading actuator 3, the output end of the electro-hydraulic servo loading actuator 3 is connected to the working end face of the input pressure head 5, the input pressure head 5 is rotatably installed with one end of the lever beam 9, and the other end of the lever beam 9 is It is rotatably installed with the output ram 6, and the working end face of the output ram 6 is fixed to the top end face of the distribution beam 11, and the two ends of the bottom end face of the distribution beam 11 are respectively equipped with a fixed hinge support 12 and a sliding support 13; in a single pressurizing mechanism, the electro-hydraulic servo loading actuator 3 is extended to apply a load to the input ram 5, and the load on the input ram 5 is transferred to the output ram 6 through the lever beam 9, thereby applying a load to the distribution beam 11 through the output ram 6, and then driving the corresponding fixed hinge support 12 and the sliding support 13 to apply a load to the typical ice-breaking structure 2.

[0029] In a single pressurizing mechanism, a plurality of pads 15 are mounted on the bottom of the fixed hinge support 12 and the sliding support 13 .

[0030] In a single pressurizing mechanism, the sliding support 13 is detachably installed on the distribution beam 11 through pins. By adjusting the installation position of the sliding support 13 on the distribution beam 11, the horizontal distance between the sliding support 13 and the output pressure head 6 is adjusted, thereby changing the distribution ratio of the load output by the output pressure head 6 between the sliding support 13 and the fixed hinge support 12.

[0031] In a single pressurizing mechanism, the input pressure head 5 is rotatably mounted through the first hinge shaft 7 and the corresponding end of the lever beam 9, and the output pressure head 6 is rotatably mounted through the second hinge shaft 8 and the corresponding end of the lever beam 9.

[0032] In a single pressurizing mechanism, a supporting vertical beam 10 is installed in the middle of the lever cross beam 9 , and the supporting vertical beam 10 supports the lever cross beam 9 .

[0033] In a single pressurizing mechanism, the supporting vertical beam 10 is rotatably mounted with the lever cross beam 9 via a third hinge shaft 14 .

[0034] In a single pressurizing mechanism, the working end surface of the input pressure head 5 and the working end surface of the output pressure head 6 are both planar.

[0035] In a single pressurizing mechanism, the electro-hydraulic servo loading actuator 3 and the base platform 1 , as well as the typical ice-breaking structure 2 and the base platform 1 are mounted together by means of a plurality of bolts 4 .

[0036] In the single pressurizing mechanism, the input end of the electro-hydraulic servo loading actuator 3 is connected to the hydraulic source.

[0037] It also includes several displacement sensors and several strain sensors. The displacement sensors are used to measure the displacement of the typical ice-breaking structure 2 , and the strain sensors are used to measure the strain of the typical ice-breaking structure 2 .

[0038] The specific structure and functions of the present invention are as follows:

[0039] The floating icebreaking simulation test device for a large-scale icebreaking structure model of the present invention comprises a base platform 1, an electro-hydraulic servo loading actuator 3, an input pressure head 5, an output pressure head 6, a lever beam 9, a distribution beam 11, a fixed hinge support 12, and a sliding support 13; the test device is used to perform a floating icebreaking simulation test on a large-scale typical icebreaking structure 2, wherein:

[0040] The base platform 1 provides a stable support surface for the test device, ensuring that the test device will not be damaged or malfunction due to vibration or shaking during operation. When conducting the test, the typical icebreaking structure 2 is fixed to the top of the base platform 1 by bolts 4.

[0041] like Figure 4 As shown, in the present invention, two pressurizing mechanisms are arranged on the top of the base platform 1. In a single pressurizing mechanism,

[0042] The electro-hydraulic servo loading actuator 3 is connected to the hydraulic source, and its output end is connected to the input pressure head 5, and can drive the input pressure head 5 to perform linear motion along the vertical direction.

[0043] The input pressure head 5 is rotatably connected to one end of the lever beam 9 through the first hinge shaft 7, and the other end of the lever beam 9 is rotatably connected to the output pressure head 6 through the second hinge shaft 8. The input pressure head 5 can rotate around the first hinge shaft 7, and the output pressure head 6 can rotate around the second hinge shaft 8, so as to ensure that the working end face of the input pressure head 5 is completely in contact with the output end connection plane of the electro-hydraulic servo loading actuator 3, and the working end face of the output pressure head 6 is completely in contact with the top end face of the distribution beam 3, thereby ensuring that the load can be input along the normal line of the working end face of the input pressure head 5 and output along the normal line of the working end face of the output pressure head 6, so as to improve the load transmission efficiency and improve the structural stability;

[0044] In addition, the working end surfaces of the input pressure head 5 and the output pressure head 6 are both planar, which can further improve the load transfer efficiency.

[0045] The pad 15 can convert the concentrated loads of the corresponding fixed hinge support 12 and the corresponding sliding support 13 into local uniformly distributed loads, thereby accurately simulating the distribution of the corresponding ice loads of the typical icebreaking structure of the underwater vehicle under the floating icebreaking condition, so as to improve the reliability of the test results; at the same time, it can also avoid the stress concentration problem of the typical icebreaking structure 2.

[0046] Considering that the vertical ultimate bearing capacity of the typical ice-breaking structure 2 needs to be obtained during the test, a lever beam 9 is used when the output load of the electro-hydraulic servo loading actuator 3 is limited. The lever beam 9 amplifies the load based on the lever principle. The lever beam 9 uses longitudinal and transverse ribs to strengthen the frame structure, which has sufficient strength and rigidity to ensure that no obvious deformation occurs during the load transfer and amplification process. The lever beam 9 can amplify the output load of the electro-hydraulic servo loading actuator 3, thereby achieving the overall crushing of the typical ice-breaking structure 2 to obtain its ultimate bearing capacity destruction pressure and destruction form.

[0047] In view of the regional differences in ice load distribution, a distribution beam 11 is used to redistribute the output load of the electro-hydraulic servo loading actuator 3 according to different positions; the distribution beam 11 adopts a statically determinate simply supported beam and is an important load transmission component. The fixed hinge support 12 and the sliding support 13 are respectively installed at the two ends of the corresponding distribution beam 11, and the installation position of the sliding support 13 is adjustable, so that the load applied to the output pressure head 6 can be distributed according to a certain proportion. The load distribution ratio is limited to 1:4, and the distribution level is not more than 3 levels.

[0048] The supporting vertical beam 10 also adopts a longitudinal and transverse ribbed plate reinforced frame structure, which has sufficient strength and rigidity. Its bottom is fixed to the top of the base platform 1 by several bolts 4, and its top is hinged to the lever beam 8 by a third hinge shaft 14, which can improve the structural stability of the lever beam 9.

[0049] The working process of the present invention is as follows:

[0050] Step 1: fix the typical ice-breaking structure 2, two electro-hydraulic servo loading actuators 3, and two supporting vertical beams 10 on the base platform 1 through several bolts 4;

[0051] Connect the input ends of the two electro-hydraulic servo loading actuators 3 to the two output ends of the hydraulic source respectively;

[0052] Step 2: Arrange multiple strain sensors and multiple displacement sensors on the typical ice-breaking structure 2 to collect structural response data during the test. The strain sensors and displacement sensors are electrically connected to the external industrial control computer for signal transmission. The strain sensors and displacement sensors are initially zeroed by the external industrial control computer.

[0053] The strain sensors and displacement sensors are arranged at the positions where the typical ice-breaking structure 2 produces a large deformation during the test, specifically around the connection position between the typical ice-breaking structure 2 and the pad 15;

[0054] Step 3: Determine the distribution characteristics of ice load under floating icebreaking conditions through finite element simulation. Use the equivalent static load method and the principle of structural deformation similarity to equate the vertical quasi-static extrusion ice load to a static load for easy test loading.

[0055] The installation positions of the two sliding supports 13 on the corresponding distribution beam 11 are determined according to the distribution characteristics of the ice load, and the distribution ratio of the load output by the output pressure head 6 between the sliding support 13 and the fixed hinge support 12 is adjusted, so that the load distribution of the corresponding sliding support 13 and the corresponding fixed hinge support 12 is consistent with the distribution of the ice load under the floating icebreaking working condition;

[0056] Step 4: Control the loading rate and load-time curve parameters of the two electro-hydraulic servo loading actuators 3 through the hydraulic source;

[0057] The loading rate and load-time curve parameter settings of the two electro-hydraulic servo loading actuators 3 may be the same or different;

[0058] Step 5: Two electro-hydraulic servo loading actuators 3 are started, thereby transmitting load in sequence through the corresponding input pressure head 5, lever beam 9, output pressure head 6, and distribution beam 11, and then applying load on the typical ice-breaking structure 2 through the corresponding fixed hinge support 12 and sliding support 13. The test data is used in real time through strain sensors and displacement sensors to record the ultimate bearing capacity failure mode of the typical ice-breaking structure 2.

[0059] The above description is an explanation of the present invention, not a limitation of the present invention. The scope of the present invention is defined in the claims. Any form of modification may be made within the scope of protection of the present invention.

Claims

1. A floating icebreaking simulation test device for a large-scale icebreaking structure model, characterized in that: It comprises a base platform (1), wherein a plurality of pressurizing mechanisms are fixed at intervals on the top of the base platform (1), and pressure is applied to a typical ice-breaking structure (2) through the pressurizing mechanisms, thereby simulating the floating ice-breaking working condition of the typical ice-breaking structure (2); The structure of a single pressurizing mechanism is as follows: it comprises a vertically placed electro-hydraulic servo loading actuator (3), the output end of the electro-hydraulic servo loading actuator (3) is connected to the working end face of an input pressure head (5), the input pressure head (5) is rotatably mounted on one end of a lever cross beam (9), the other end of the lever cross beam (9) is rotatably mounted on an output pressure head (6), the working end face of the output pressure head (6) is fixed to the top end face of a distribution beam (11), and the two ends of the bottom end face of the distribution beam (11) are respectively matched with a fixed hinge support (12) and a sliding support (13); In a single pressurizing mechanism, the electro-hydraulic servo loading actuator (3) is extended to apply a load to an input pressure head (5), and the load on the input pressure head (5) is transmitted to an output pressure head (6) through a lever crossbeam (9), thereby applying a load to a distribution beam (11) through the output pressure head (6), and then driving a corresponding fixed hinge support (12) and a sliding support (13) to apply a load to a typical ice-breaking structure (2).

2. The floating icebreaking simulation test device for a large-scale icebreaking structure model according to claim 1 is characterized in that: In a single pressurizing mechanism, the bottoms of the fixed hinge support (12) and the sliding support (13) are both cooperatively mounted with a plurality of pads (15).

3. The floating icebreaking simulation test device for a large-scale icebreaking structure model according to claim 1 is characterized in that: In a single pressurizing mechanism, the sliding support (13) is detachably mounted on the distribution beam (11) via a pin, and the horizontal distance between the sliding support (13) and the output pressure head (6) is adjusted by adjusting the mounting position of the sliding support (13) on the distribution beam (11), thereby changing the distribution ratio of the load output by the output pressure head (6) between the sliding support (13) and the fixed hinge support (12).

4. The floating icebreaking simulation test device for a large-scale icebreaking structure model according to claim 1, characterized in that: In a single pressurizing mechanism, the input pressure head (5) is rotatably mounted via a first hinge shaft (7) and a corresponding end of a lever beam (9), and the output pressure head (6) is rotatably mounted via a second hinge shaft (8) and a corresponding end of a lever beam (9).

5. The floating icebreaking simulation test device for a large-scale icebreaking structure model according to claim 1, characterized in that: In a single pressurizing mechanism, a supporting vertical beam (10) is installed in the middle of the lever cross beam (9), and the supporting vertical beam (10) supports the lever cross beam (9).

6. The floating icebreaking simulation test device for a large-scale icebreaking structure model according to claim 5, characterized in that: In a single pressurizing mechanism, the supporting vertical beam (10) is rotatably mounted with the lever cross beam (9) via a third hinge shaft (14).

7. The floating icebreaking simulation test device for a large-scale icebreaking structure model according to claim 1, characterized in that: In a single pressurizing mechanism, the working end surface of the input pressure head (5) and the working end surface of the output pressure head (6) are both planar.

8. The floating icebreaking simulation test device for a large-scale icebreaking structure model according to claim 1, characterized in that: In a single pressurizing mechanism, the electro-hydraulic servo loading actuator (3) and the base platform (1), and the typical ice-breaking structure (2) and the base platform (1) are both mounted in cooperation with each other via a plurality of bolts (4).

9. The floating icebreaking simulation test device for a large-scale icebreaking structure model according to claim 1, characterized in that: In a single pressurizing mechanism, the input end of the electro-hydraulic servo loading actuator (3) is connected to a hydraulic source.

10. The floating icebreaking simulation test device for a large-scale icebreaking structure model according to claim 1, characterized in that: It also comprises a plurality of displacement sensors and a plurality of strain sensors, wherein the displacement sensors are used to measure the displacement of the typical ice-breaking structure (2), and the strain sensors are used to measure the strain of the typical ice-breaking structure (2).

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