A flow load measuring device

Abstract

The application discloses a flow load measuring device and relates to the field of ocean engineering test, which comprises a platform-force measuring mechanism connector 1, a force measuring mechanism 2 and a trailer-force measuring mechanism connector 3; the platform-force measuring mechanism connector 1 is used for fixing the force measuring mechanism 2 and the trailer-force measuring mechanism connector 3 through a combined girder 11, a screw rod 12 and a disc 13. The application can not only solve the problem that flow conditions are difficult to simulate in ocean engineering test, but also save test cost.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of ocean engineering test, in particular to a flow load measuring device. BACKGROUND

[0002] China is a large country of ocean, the ocean area is equivalent to one third of the land, has huge ecological and economic value. With the proposal of China's ocean power strategy, the demand of various ships and ocean engineering structures is increasing. The pool model test can simulate the real ocean environment, and can accurately predict the hydrodynamic performance and load of the ship structure, which lays the foundation for the optimization design in the future.

[0003] Among various loads, the flow load on the floating structure cannot be ignored. However, in the actual test, on the one hand, due to the water depth and other reasons, it is difficult to simulate the required flow environment, on the other hand, the cost of test is limited, and the cost of flow generation is relatively high. Therefore, sometimes in the test, the size of the flow load needs to be measured by other methods, and then the flow load is applied to the structure.

[0004] Therefore, the skilled in the art is committed to developing a flow load measuring device for pool model test, which not only solves the problem of difficult flow simulation, but also saves the cost. SUMMARY

[0005] In view of the above defects of the prior art, the technical problem to be solved by the present application is to accurately simulate the flow environment and improve the technical ability of ocean engineering experiment.

[0006] To achieve the above purpose, the present application provides a flow load measuring device, which comprises: a platform-force measuring mechanism connecting piece 1, a force measuring mechanism 2, a trailer-force measuring mechanism connecting piece 3; the platform-force measuring mechanism connecting piece 1 is fixed with the force measuring mechanism 2 and the trailer-force measuring mechanism connecting piece 3 through the combination of the first truss member 11, the first screw 12 and the disc 13, so as to ensure that the platform does not move when it is tested in the towing pool, and improve the measurement stability of the force measuring mechanism.

[0007] Two kinds of screw holes are opened on the disc 13, the screw hole one 131 corresponds to the screw hole on the first truss member 11, and is used to fix the platform; the screw hole two 132 is connected with the second truss member 21, and is used to fix the force measuring device. The screw hole two 132 is arranged every 30° on the disc 13, and is used to adjust the direction of the force measuring mechanism, so as to measure the action point and size of the flow load under different directions of the platform.

[0008] In the preferred embodiment of the present application, the force measuring mechanism 2 comprises a force measuring device 21 and a second truss member 22. A total of 5 force measuring devices are installed on the front, left and upper parts of the second truss member 22, and the action position and size of the flow load can be obtained through the size of the force at the five places.

[0009] Assume that the flow load size is F current , the action point of the flow load is P(x, y, z), according to the force principle, it is known that:

[0010] F current = F X1 (1)

[0011] F Z2 (L+x)+F Z1 x=F X1 z (2)

[0012] F Y2 (L+x)+F Y1 x=F X1 y (3)

[0013] (F Y1 +F Y2 )x=(F Z1 +F Z2 )y (4)

[0014] The force measuring device 21 is composed of screw rod two 221, universal joint 222 and tension and compression sensor 223. The universal joint 222 is connected with the second beam 22 first, then the other end is connected with the tension and compression sensor 223 through the screw rod two 221, and then the screw rod two 221 is connected with the universal joint 222 and the trailer-force measuring mechanism connecting piece 3 in sequence, so that the platform is prevented from being damaged by non-axial load during the towing process.

[0015] In the preferred embodiment of the present application, the trailer-force measuring mechanism connecting piece 3 is welded by three aluminum plates, the top aluminum plate is provided with screw holes connected with the trailer and the force measuring mechanism 2 respectively, wherein the screw hole three 31 is connected with the trailer, and the screw hole four 32 is used for being connected with the force measuring mechanism 2.

[0016] In another preferred embodiment of the present application, after the device is assembled, the test is carried out in the towing pool. By adjusting the direction of the device and the speed of the trailer, the flow load size and position under different directions and flow speeds can be measured.

[0017] The present application not only can solve the problem that the flow condition is difficult to simulate, but also saves the cost. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is the overall schematic view of the flow load measuring device;

[0019] Figure 2 It is the schematic view of the platform-force measuring mechanism connecting piece;

[0020] Figure 3 It is the schematic view of the disc;

[0021] Figure 4This is a schematic diagram of a force measuring mechanism;

[0022] Figure 5 This is a schematic diagram of a force measuring device;

[0023] Figure 6 This is a schematic diagram of the trailer-force measuring mechanism connection.

[0024] Figure 7 This is a schematic diagram of the force measurement principle.

[0025] Among them, 1-Platform-Force Measuring Mechanism Connector, 11-Handle One, 12-Screw One, 13-Disc, 131-Screw Hole One, 132-Screw Hole Two, 2-Force Measuring Mechanism, 21-Handle Two, 22-Force Measuring Device, 221-Screw Two, 222-Universal Joint, 223-Tension / Compression Sensor, 3-Trailer-Force Measuring Mechanism Connector, 31-Screw Hole Three, 32-Screw Hole Four Detailed Implementation

[0026] The following description, with reference to the accompanying drawings, illustrates several preferred embodiments of the present invention to make its technical content clearer and easier to understand. The present invention can be embodied in many different forms, and the scope of protection of the present invention is not limited to the embodiments mentioned herein.

[0027] In the accompanying drawings, components with the same structure are indicated by the same numerical designation, and components with similar structures or functions are indicated by similar numerical designations. The dimensions and thicknesses of each component shown in the drawings are arbitrary, and the present invention does not limit the dimensions and thicknesses of each component. To make the illustrations clearer, the thickness of some components has been appropriately exaggerated in the drawings.

[0028] like Figure 1 As shown, the flow load measuring device includes a platform-force measuring mechanism connector 1, a force measuring mechanism 2, and a trailer-force measuring mechanism connector 3; the platform-force measuring mechanism connector 1 is assembled as follows: Figure 2 The truss 11, screw 12, and disc 13 shown are used to fix the force measuring mechanism 2 and the trailer-force measuring mechanism connector 3, thereby ensuring that the platform will not move when it is tested in the towing water tank and improving the measurement stability of the force measuring mechanism.

[0029] Among them, such as Figure 3 As shown, the disc 13 of the platform-force measuring mechanism connector has two types of screw holes: screw hole one 131 and screw hole two 132. Screw hole one 131 corresponds to the screw hole on the truss one 11 and is used to fix the platform; screw hole two 132 connects to the truss two 21 and is used to fix the force measuring mechanism. Screw hole two 132 is set every 30° on the disc 13 to adjust the direction of the force measuring mechanism, thereby measuring the point of application and magnitude of the flow load on the platform in different directions.

[0030] In the preferred embodiment of the present application, as shown in Figure 4 Fig. 2, the force measuring mechanism 2 comprises force measuring devices 21 and a girder 22. Five force measuring devices are installed on the front, left, and upper parts of the girder 22. The force measured by the five force measuring devices can be used to determine the position and magnitude of the flow load. Figure 7 Fig. 3 is a schematic diagram of the force measuring principle.

[0031] Suppose the flow load is F current , and the point of action of the flow load is P(x, y, z). According to the force measuring principle, we have:

[0032] F current = F X1 (1)

[0033] F Z2 (L+x)+F Z1 x=F X1 z (2)

[0034] F Y2 (L+x)+F Y1 x=F X1 y (3)

[0035] (F Y1 +F Y2 )x=(F Z1 +F Z2 )y (4)

[0036] where L is the distance between the two force measuring points above the girder 22 and the two force measuring points on the side of the girder 22; F X1 is the tension at the front force measuring point of the girder 22; F Y1 and F Y2 are the tensions at the two force measuring points on the side of the girder 22; and F Z1 and F Z2 are the tensions at the two force measuring points above the girder 22.

[0037] As shown in Figure 5 Fig. 4, the force measuring device 21 comprises a screw 221, a universal joint 222, and a tension and compression sensor 223. The universal joint 222 is first connected to the girder 22, and then the other end is connected to the tension and compression sensor 223 through the screw 221. The tension and compression sensor 223 is then connected to the trailer-force measuring mechanism connecting member 3 through the screw 221, the universal joint 222, and the trailer-force measuring mechanism connecting member 3 in sequence, so as to prevent the platform from being damaged by non-axial loads during towing.

[0038] In the preferred embodiment of the present application, as shown in Figure 6As shown, the trailer-dynamometer connecting piece 3 is welded by three aluminum plates, the top aluminum plate is provided with screw holes for connecting with the trailer and the dynamometer 2, wherein the screw hole three 31 is connected with the trailer, and the screw hole four 32 is used for connecting with the dynamometer 2.

[0039] The preferred embodiments of the present application have been described in detail. It should be understood that modifications and variations can be made by those of ordinary skill in the art without departing from the spirit and scope of the application. Accordingly, it is intended that all such possible modifications and variations be included within the scope of the present application as defined by the following claims.

Claims

1. A flow load measuring device, the device comprising: Platform-dynamometer connecting piece (1), dynamometer (2), trailer-dynamometer connecting piece (3); platform-dynamometer connecting piece (1) is fixed by combination of beam one (11), screw rod one (12), disc (13), to fix dynamometer (2) and trailer-dynamometer connecting piece (3), the dynamometer (2) includes force measuring device (21) and beam two (22); the front, left, upper of the beam two (22) installs 5 force measuring devices in total, and the acting position and the size of the flow load suffered by the platform are obtained by the size of the force measured by five force measuring devices.

2. The apparatus of claim 1, wherein, Two kinds of screw holes are opened on the disc (13), screw hole one (131) corresponds to the screw hole on the beam one (11), to fix the platform, screw hole two (132) is connected with the beam two (22), to fix the force measuring device.

3. The apparatus of claim 2, wherein, The screw hole two (132) is set every 30° on the disc (13).

4. The apparatus of claim 1, wherein, The force measuring device is installed on the beam two (22).

5. The apparatus of claim 4, wherein, The beam two (22) is cuboid structure.

6. The apparatus of claim 5, wherein, The distance between the upper two force measuring points and the side two force measuring points of the second girder (22) is L, and the flow load is assumed to be , and the action point of the flow load is . According to the force measuring principle, it can be known that: (1) (2) (3) (4) wherein, F Y1 , F Y2 are the tensile forces at the two force measurement points on the side of the second girder (22), respectively; F Z1 , F Z2 are the tensile forces at the two force measurement points above the second girder (22), respectively.

7. The apparatus of claim 1, wherein, The force measuring device (21) is composed of screw rod two (221), universal joint (222), tension and compression sensor (223); the universal joint (222) is connected with the beam two (22) first, then the other end is connected with the tension and compression sensor (223) through the screw rod two (221), and then is connected with the universal joint (222) and trailer-dynamometer connecting piece (3) through the screw rod two (221) in turn.

8. The apparatus of claim 1, wherein, The trailer-dynamometer connecting piece (3) is welded by three aluminum plates, the top aluminum plate is provided with screw holes connected with the trailer and the dynamometer (2) respectively, wherein the screw hole three (31) is connected with the trailer, and the screw hole four (32) is used for being connected with the dynamometer (2).

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