Large-scale icebreaking structure model using a floating ice simulation test device

Abstract

The present application relates to a kind of large-scale icebreaking structure model with floating ice simulation test device, including base platform, several pressurizing mechanisms are fixed with interval on the top of base platform, pressure is applied to typical icebreaking structure by pressurizing mechanism;The structure of single pressurizing mechanism is as follows: including electro-hydraulic servo loading actuator, the output end of electro-hydraulic servo loading actuator is connected with the working end surface of input pressure head, input pressure head is rotatably installed with the one end of lever beam, the other end of lever beam is rotatably installed with output pressure head, the working end surface of output pressure head is fixed with the top end surface of distribution beam, the two ends of distribution beam bottom end surface are respectively matched with fixed hinge support and sliding support installation.Can be used to simulate the stress state of typical icebreaking structure of underwater vehicle under the condition of floating ice, collect the strain response data and deformation response data of typical icebreaking structure under the action of distributed ice load, obtain the ultimate bearing capacity failure pressure and failure mode of typical icebreaking structure.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of polar icebreaking technology, and particularly relates to a large-scale icebreaking structure model up-floating icebreaking simulation test device. BACKGROUND

[0002] The polar ice layer can greatly improve the acoustic stealth performance of the underwater vehicle as a natural barrier, but the existence of the ice layer brings great challenges to the structural safety of the underwater vehicle during up-floating, and therefore the up-floating icebreaking operation capability is an important indicator for examining the viability and combat effectiveness of the underwater vehicle in the polar region.

[0003] At present, the research on the underwater vehicle capable of up-floating icebreaking in the polar region is still in its infancy. Since the preparation, collection and transfer of large-thickness ice plates are quite difficult, the research methods mainly include numerical simulation and small-thickness ice plate combined with small-scale icebreaking structure rigid body model test. The numerical simulation can simulate the interaction between the icebreaking structure of the underwater vehicle and the ice plate during the up-floating icebreaking of the underwater vehicle, but the reliability of the calculation results is difficult to guarantee. The small-thickness ice plate combined with the small-scale icebreaking structure rigid body model test can obtain the ice resistance borne by the icebreaking structure of the underwater vehicle during the up-floating icebreaking process and the failure mode of the ice plate, but cannot obtain the strain and deformation response data of the icebreaking structure of the underwater vehicle, and cannot provide data support for the optimization design of the icebreaking structure of the underwater vehicle. SUMMARY

[0004] In view of the above-mentioned shortcomings in the prior production technology, the present application provides a large-scale icebreaking structure model up-floating icebreaking simulation test device, which can be used to simulate the stress state of the typical icebreaking structure of the underwater vehicle under the up-floating icebreaking working condition, collect the strain response data and deformation response data of the typical icebreaking structure under the distributed ice load, and obtain the ultimate bearing capacity failure pressure and failure mode of the typical icebreaking structure.

[0005] The technical scheme adopted by the present application is as follows:

[0006] A large-scale icebreaking structure model up-floating icebreaking simulation test device, comprising a base platform, a plurality of pressurizing mechanisms are fixed at the top of the base platform in intervals, and the pressurizing mechanisms are used to apply pressure to the typical icebreaking structure, so as to simulate the up-floating icebreaking working condition of the typical icebreaking structure.

[0007] The structure of a single pressurizing mechanism comprises an electric-hydraulic servo loading actuator arranged vertically, the output end of the electric-hydraulic servo loading actuator is connected with the working end face of an input pressure head, the input pressure head is rotationally installed with one end of a lever cross beam, the other end of the lever cross beam is rotationally installed with an output pressure head, the working end face of the output pressure head is fixed with the top end face of a distribution beam, and the bottom end face of the distribution beam is respectively fitted with a fixed hinge support and a sliding support.

[0008] In the single pressurizing mechanism, the electro-hydraulic servo loading actuator extends to apply a load to the input pressure head, the load applied to the input pressure head is transmitted to the output pressure head through the lever cross beam, thereby applying a load to the distribution beam through the output pressure head, and further 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 the single pressurizing mechanism, the bottom of the fixed hinge support and the sliding support is matched with a plurality of base plates.

[0011] In the single pressurizing mechanism, the sliding support is detachably installed with the distribution beam through a pin, and the horizontal distance between the sliding support and the output pressure head is adjusted by adjusting the installation position of the sliding support on the distribution beam, 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 the single pressurizing mechanism, the input pressure head is rotatably installed with the corresponding end of the lever cross beam through a first hinge shaft, and the output pressure head is rotatably installed with the corresponding end of the lever cross beam through a second hinge shaft.

[0013] In the single pressurizing mechanism, the middle part of the lever cross beam is matched with a supporting vertical beam, and the supporting vertical beam supports the lever cross beam.

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

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

[0016] In the single pressurizing mechanism, the electro-hydraulic servo loading actuator and the base platform, and the typical icebreaking structure and the base platform are both matched and installed through a plurality of bolts.

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

[0018] Further comprising a plurality of displacement sensors and a plurality of strain sensors, the displacement sensors are used to measure the displacement of the typical icebreaking structure, and the strain sensors are used to measure the strain of the typical icebreaking structure.

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

[0020] The application has the advantages of compact structure, rationality, convenient operation, equivalent loading of quasi-static ice load through the setting of the pressing mechanism, strain response and deformation response of the typical ice-breaking structure of the underwater vehicle under the equivalent ice load, and reliability of the numerical simulation result and feasibility of the load equivalent method through comparison with the simulation result.

[0021] The application can amplify the output load of the electro-hydraulic servo loading actuator through the setting of the lever cross beam, can realize the overall crushing of the typical ice-breaking structure, and obtain the ultimate bearing capacity and failure pressure and failure mode of the typical ice-breaking structure; the output load of the limited number of output pressure heads can be distributed through the setting of the distribution beam, the fixed hinge support and the sliding support, so that the regional difference of the equivalent ice load can be simulated. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is a structural schematic view of the application.

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

[0024] Figure 3 It is Figure 2 It is a local enlarged view of the A section in the figure.

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

[0026] 1, base platform; 2, typical ice-breaking structure; 3, electro-hydraulic servo loading actuator; 4, bolt; 5, input pressure head; 6, output pressure head; 7, first hinge shaft; 8, second hinge shaft; 9, lever cross beam; 10, supporting vertical beam; 11, distribution beam; 12, fixed hinge support; 13, sliding support; 14, third hinge shaft; 15, pad. DETAILED DESCRIPTION

[0027] The specific embodiment of the application will be described below in combination with the drawings.

[0028] As Figures 1-4As shown, the large-scale icebreaking structure model of the embodiment uses a floating icebreaking simulation test device, which comprises a base platform 1, a plurality of pressurizing mechanisms are fixed at the top of the base platform 1, and pressure is applied to the typical icebreaking structure 2 through the pressurizing mechanisms, so as to simulate the floating icebreaking working condition of the typical icebreaking structure 2; the structure of a single pressurizing mechanism comprises an electric-hydraulic servo loading actuator 3 arranged vertically, the output end of the electric-hydraulic servo loading actuator 3 is connected with the working end face of an input pressure head 5, the input pressure head 5 is rotatably installed at one end of a lever cross beam 9, the other end of the lever cross beam 9 is rotatably installed with an output pressure head 6, the working end face of the output pressure head 6 is fixed with the top end face of a distribution beam 11, and the bottom end face of the distribution beam 11 is respectively and correspondingly installed with a fixed hinge support 12 and a sliding support 13; in the single pressurizing mechanism, the electric-hydraulic servo loading actuator 3 is extended to apply load to the input pressure head 5, the load borne by the input pressure head 5 is transmitted to the output pressure head 6 through the lever cross beam 9, so as to apply load to the distribution beam 11 through the output pressure head 6, and then drive the corresponding fixed hinge support 12 and sliding support 13 to apply load to the typical icebreaking structure 2.

[0029] In the single pressurizing mechanism, a plurality of pad plates 15 are correspondingly installed at the bottom of the fixed hinge support 12 and the sliding support 13.

[0030] In the single pressurizing mechanism, the sliding support 13 is detachably installed with the distribution beam 11 through a pin, the installation position of the sliding support 13 on the distribution beam 11 is adjusted, so as to adjust the horizontal distance between the sliding support 13 and the output pressure head 6, and then change 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 the single pressurizing mechanism, the input pressure head 5 is rotatably installed with the corresponding end head of the lever cross beam 9 through a first hinge shaft 7, and the output pressure head 6 is rotatably installed with the corresponding end head of the lever cross beam 9 through a second hinge shaft 8.

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

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

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

[0035] In the single pressurizing mechanism, the electric-hydraulic servo loading actuator 3 and the base platform 1, and the typical icebreaking structure 2 and the base platform 1 are all correspondingly installed through a plurality of bolts 4.

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

[0037] Also included are a plurality of displacement sensors for measuring displacement of the typical icebreaking structure 2 and a plurality of strain sensors for measuring strain of the typical icebreaking structure 2.

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

[0039] The large-scale icebreaking structure model of the present application uses a floating ice simulation test device including a base platform 1, an electro-hydraulic servo loading actuator 3, an input pressure head 5, an output pressure head 6, a lever cross beam 9, a distribution beam 11, a fixed hinge support 12, and a sliding support 13.

[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.

[0041] As shown in FIG. 1, the top of the base platform 1 is provided with two pressurizing mechanisms. Figure 4

[0042] The electro-hydraulic servo loading actuator 3 is connected to a hydraulic source, and its output end is connected to the input pressure head 5, enabling the input pressure head 5 to move linearly in the vertical direction.

[0043] The input pressure head 5 is rotationally connected to one end of the lever cross beam 9 via a first hinge shaft 7, and the other end of the lever cross beam 9 is rotationally connected to the output pressure head 6 via a second hinge shaft 8.

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

[0045] The gusset plate 15 can convert the concentrated load corresponding to the fixed hinge support 12 and the sliding support 13 into a locally uniform load, thereby accurately simulating the distribution of the corresponding ice load of the typical icebreaking structure of the underwater vehicle under the floating ice working condition, improving the reliability of the test results, and also avoiding stress concentration problems of the typical icebreaking structure 2.

[0046] ​In view of the vertical ultimate bearing capacity of the typical icebreaking structure 2 to be obtained in the test process, the lever beam 9 is used to amplify the load based on the lever principle in the case that the output load of the electro-hydraulic servo loading actuator 3 is limited; the lever beam 9 adopts a longitudinal and transverse rib plate reinforced frame structure and has sufficient strength and rigidity to ensure that no obvious deformation occurs in the load transmission and amplification process; the lever beam 9 can amplify the output load of the electro-hydraulic servo loading actuator 3, so as to realize the overall crushing of the typical icebreaking structure 2 and obtain the ultimate bearing capacity failure pressure and failure mode of the typical icebreaking structure 2.

[0047] In view of the regional differentiation characteristics of the ice load distribution, the output load of the electro-hydraulic servo loading actuator 3 is redistributed according to different positions by using the distribution beam 11; the distribution beam 11 is 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 two ends of the distribution beam 11; 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 within 1:4, and the distribution level is not more than 3 levels.

[0048] The supporting vertical beam 10 also adopts a longitudinal and transverse rib plate reinforced frame structure and has sufficient strength and rigidity; the bottom of the supporting vertical beam 10 is fixed to the top of the base platform 1 through a plurality of bolts 4; the top of the supporting vertical beam 10 is hinged to the lever beam 9 through a third hinge shaft 14, so as to improve the structural stability of the lever beam 9.

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

[0050] First step: the typical icebreaking structure 2, the two electro-hydraulic servo loading actuators 3 and the two supporting vertical beams 10 are fixed on the base platform 1 through a plurality of bolts 4;

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

[0052] Second step: a plurality of strain sensors and a plurality of displacement sensors are arranged on the typical icebreaking structure 2 to collect the structural response data in the test process; the strain sensors and the displacement sensors are respectively electrically connected to an external industrial computer for signal transmission; the strain sensors and the displacement sensors are respectively initially zeroed by the external industrial computer;

[0053] The strain sensors and the displacement sensors are arranged at positions where the typical icebreaking structure 2 produces large deformation in the test process, specifically around the connection position between the typical icebreaking structure 2 and the backing plate 15;

[0054] Third step: the distribution characteristics of the ice load under the ice breaking working condition are determined by finite element simulation; the vertical quasi-static extrusion ice load is equivalent to a static load according to the structure deformation similarity principle by using the equivalent static load method, so as to facilitate the test loading.

[0055] According to the distribution characteristics of the ice load, the installation positions of the two sliding supports 13 on the corresponding distribution beams 11 are determined, the distribution proportion of the load output by the output pressure head 6 between the sliding supports 13 and the fixed hinge supports 12 is adjusted, so that the load distribution of the corresponding sliding supports 13 and the corresponding fixed hinge supports 12 is consistent with the distribution of the ice load in the ice breaking working condition;

[0056] Fourth step: the loading rate and load-time curve parameters of the two electro-hydraulic servo loading actuators 3 are controlled by the hydraulic source;

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

[0058] Fifth step: the two electro-hydraulic servo loading actuators 3 are started, so as to sequentially transmit the load through the corresponding input pressure head 5, lever beam 9, output pressure head 6 and distribution beam 11, and then apply the load on the typical ice breaking structure 2 through the corresponding fixed hinge support 12 and sliding support 13, and the test data are recorded in real time by the strain sensor and displacement sensor, and the ultimate bearing capacity and failure mode of the typical ice breaking structure 2 are recorded.

[0059] The above description is an explanation of the application, not a limitation of the application, the scope of the application is defined in the claims, within the protection scope of the application, any form of modification can be made.

Claims

1. A floating icebreaking simulation test device for a large-scale icebreaking structure model, characterized in that: Includes a base platform (1), and several pressurizing mechanisms are fixed at intervals on the top of the base platform (1). Pressure is applied to the typical icebreaking structure (2) through the pressurizing mechanisms to simulate the floating icebreaking 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 which is connected to the working end face of the input pressure head (5), the input pressure head (5) is rotatably installed at one end of the lever beam (9), the other end of the lever beam (9) is rotatably installed at the output pressure head (6), the working end face of the output pressure head (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 fitted with a fixed hinge support (12) and a sliding support (13); In a single pressurization mechanism, the electro-hydraulic servo loading actuator (3) extends to apply a load to the input pressure head (5), and transmits the load on the input pressure head (5) to the output pressure head (6) through the lever beam (9), thereby applying a load to the distribution beam (11) through the output pressure head (6), and then driving the corresponding fixed hinge support (12) and sliding support (13) to apply a load to the typical icebreaking structure (2).

2. The floating icebreaking simulation test device for a large-scale icebreaking structure model as described in claim 1, characterized in that: In a single pressurizing mechanism, several pads (15) are fitted to the bottom of both the fixed hinge support (12) and the sliding support (13).

3. The floating icebreaking simulation test device for a large-scale icebreaking structure model as described in claim 1, characterized in that: In a single pressurizing mechanism, the sliding support (13) is detachably installed on the distribution beam (11) by means of a pin. 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).

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

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

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

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

8. The floating icebreaking simulation test device for a large-scale icebreaking structure model as described in claim 1, characterized in that: In a single pressurization 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 installed together by several bolts (4).

9. The floating icebreaking simulation test device for a large-scale icebreaking structure model as described in claim 1, characterized in that: In a single pressurization 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 as described in claim 1, characterized in that: It also includes several displacement sensors and several strain sensors, the displacement sensors being used to measure the displacement of the typical ice-breaking structure (2) and the strain sensors being used to measure the strain of the typical ice-breaking structure (2).

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