CN115112349A - A load decoupling device and centrifugal model test system for ocean wind, wave and current - Google Patents

Abstract

The invention discloses a load decoupling device and a marine wave flow centrifugal model test system, which are used for a marine wave flow centrifugal model test and comprise the following components: the clamping assembly is used for clamping the measured marine building model; the vertical decoupling assembly is used for decoupling vertical constraint and comprises a sliding part and a sliding matching part; the sliding part is connected with the clamping assembly, and the sliding matching part is connected with the sliding part in a sliding manner; the rotational decoupling assembly is used for decoupling rotational constraint and comprises a rotating part and a rotational matching part; the rotating matching part is connected with the sliding matching part, and the rotating part is rotatably connected with the rotating matching part. The clamping assemblies are respectively fixed on different heights of the marine structure model from top to bottom, the combined action of three loads of ocean storm flows is simulated at will on the premise that the centrifugal machine does not stop rotating, the three loads do not interfere with each other, and the requirement of simulating the ocean storm flows borne by the actual marine structure is met.

Description

A load decoupling device and centrifugal model test system for ocean wind, wave and current

technical field

The invention relates to the technical field of geotechnical centrifugal model testing, in particular to a load decoupling device and a centrifugal model testing system for ocean wind, wave and current.

Background technique

The centrifugal model test of ocean wind, wave and current refers to scaling the marine building according to similar criteria, making it into a marine building model, and then using the geotechnical centrifuge to rotate to provide centrifugal force, and applying the load to the marine building model through the dynamic loading device to simulate the sea breeze , Geotechnical Centrifugal Model Tests of Waves and Currents.

There is currently no load decoupling device suitable for geotechnical centrifugal tests in the prior art, only a patent for a three-way motion decoupling periodic structure for a shaking table model box, such as a Chinese patent document with publication number CN107782521A, which discloses a The three-way motion decoupling periodic structure of the shaking table model box is suitable for the supergravity shaking table test of the three-way ground motion test, but its defect is that it cannot be applied to the geotechnical centrifugal test.

The defect of the existing device for simulating sea wind, sea wave and current load used in the geotechnical centrifugal test is that the load cannot be gradually applied without the centrifuge not rotating, and the multi-directional loads interfere with each other, which will constrain the model structure foundation in the soil. Free deformation in the body. Therefore, it is necessary to design a load decoupling device to meet the load simulation requirements of the centrifugal model test of ocean wind, wave and current.

SUMMARY OF THE INVENTION

Therefore, the technical problem to be solved by the present invention is to overcome the defects in the prior art, and to provide a load decoupling device and a centrifugal model test system for ocean wind and wave current, so that the geotechnical centrifuge can gradually apply sea breeze, The three different types of loads, ocean waves and ocean currents, do not interfere with each other, and meet the needs of ocean wind, wave and current simulation of actual marine structures.

In order to solve the above technical problems, the present invention provides a load decoupling device for centrifugal model test of ocean wind, wave and current, including:

Clamping component, used to clamp the measured offshore building model;

a vertical decoupling assembly for decoupling a vertical constraint, comprising a sliding part and a sliding fitting part; the sliding part is connected with the clamping assembly, and the sliding fitting part is slidably connected with the sliding part;

The rotation decoupling assembly is used for decoupling the rotation constraint, and includes a rotating part and a rotating matching part; the rotating matching part is connected with the sliding matching part, and the rotating part is rotatably connected with the rotating matching part.

As a preferred mode of the present invention, at least two clamping assemblies are provided and are parallel to each other.

As a preferred mode of the present invention, the clamping assembly includes a clamping groove and a fastener, the clamping groove is clamped on the outer periphery of the tested marine building model, and the fastener is used to adjust the clamping groove clamping diameter.

As a preferred mode of the present invention, the clamping diameter of the clamping groove is not smaller than the diameter of the clamped part of the tested marine building model.

As a preferred mode of the present invention, the length of the sliding part is not less than the settlement distance of the tested marine building model.

As a preferred mode of the present invention, the length of the sliding fitting portion in the sliding direction is not less than the length of the loading surface of the dynamic loading device along the vertical direction.

As a preferred mode of the present invention, at least a part of the rotating part is spherical, and the spherical part of the rotating part is embedded in the rotating matching part.

As a preferred mode of the present invention, the diameter of the rotating portion is not less than the length of the loading surface of the dynamic loading device along the vertical direction.

An ocean wind wave current centrifugal model test system, comprising a plurality of load decoupling devices, further comprising:

Centrifugal component, used to place the tested marine building model and apply centrifugal force to the tested marine building model;

Dynamic loading device, including sea wind dynamic loading device, ocean wave dynamic loading device, and ocean current dynamic loading device;

One end of the load decoupling device is connected to the measured marine building model, and the other end is connected to the sea wind dynamic loading device, the ocean wave dynamic loading device, and the ocean current dynamic loading device.

As a preferred mode of the present invention, a plurality of the load decoupling devices are connected to the measured marine building model along the height direction.

The above-mentioned technical scheme of the present invention has the following advantages compared with the prior art:

In the present invention, a load decoupling device and a centrifugal model test system for ocean wind, wave and current are used. Under the premise of non-stop rotation, the machine gradually applies three different types of loads, namely sea wind, sea waves and sea currents, to ensure that various loads do not interfere with each other and meet the needs of ocean wind, wave and current simulation of actual marine structures.

Description of drawings

In order to make the content of the present invention easier to understand clearly, the present invention will be described in further detail below according to specific embodiments of the present invention and in conjunction with the accompanying drawings.

FIG. 1 is an elevation view of the load decoupling device of the present invention.

FIG. 2 is a top view of the load decoupling device of the present invention.

FIG. 3 is a side view of the movement path of the load decoupling device of the present invention.

FIG. 4 is an assembled top view of the centrifugal model test system for ocean wind, wave and current according to the present invention.

Description of reference numerals in the description: 1. Load decoupling device; 2. Clamping assembly; 21. Slot; 22. Fastener; 3. Vertical decoupling assembly; 31. Sliding part; 32. Sliding fitting part; 4 41, rotating part; 42, rotating matching part; 43, supporting arm; 5, base; 6, dynamic loading device.

Detailed ways

The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention.

In the description of the present invention, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "top", "bottom", " The orientation or positional relationship indicated by "inside", "outside", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific orientation, construction and operation in a particular orientation, and therefore should not be construed as a limitation of the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes, and should not be construed as indicating or implying relative importance or implying the number of indicated technical features. Thus, a feature defined as "second" or "first" may expressly or implicitly include one or more of that feature. In the description of the present invention, "plurality" means two or more, unless otherwise expressly and specifically defined.

In the present invention, unless otherwise expressly specified and limited, the terms "installed", "connected", "connected", "fixed" and other terms should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection , or integrated; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of the two elements or the interaction between the two elements. . For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

Unless expressly stated and defined otherwise, a first feature "on" or "under" a second feature may be in direct contact with the first and second features, or in indirect contact with the first and second features through an intermediary. Furthermore, the term "comprising" is intended to cover non-exclusive inclusion, such as a process, method, system, product or device comprising a series of steps or elements, not limited to the listed steps or elements but optionally also including No steps or units are listed, or optionally other steps or units inherent to these processes, methods, products or devices are included.

Example 1

1 to 4, an embodiment of a load decoupling device 1 of the present invention includes:

The clamping component 2 is used for clamping the designated position of the tested marine building model, that is, clamping the loading point of the tested marine building model.

The clamping assembly 2 includes a clamping slot 21 and a fastener 22, the clamping slot 21 is clamped on the outer periphery of the loading point of the tested marine building model, and the fastener 22 is used for adjusting the clamping slot 21. clamping diameter. The clamping component 2 is the hoop, and the clamping diameter is the inner diameter of the hoop.

The card slot 21 includes two symmetrical slots, and is provided with an arc-shaped escape portion. The fasteners 22 are bolts, with two provided for connecting the two clamping slots 21 and forming a hoop. The hoop is a detachable structure, and the clamping diameter can be adjusted by bolts to adapt to different sizes of marine building models.

The vertical decoupling component 3 is used to decouple the vertical constraints to meet the settlement requirements of the measured offshore building model.

The vertical decoupling assembly 3 includes a sliding part 31 and a sliding matching part 32 . The sliding portion 31 is connected with the clamping assembly 2 , and the sliding fitting portion 32 is slidingly connected with the sliding portion 31 . The sliding part 31 is a vertically arranged sliding rod, and the sliding matching part 32 is a sliding block sleeved on the sliding rod, and the sliding rod is slidably connected with the sliding block. The clamping assembly 2 is arranged on the sliding rod.

When the measured offshore building model settles, the vertical decoupling component 3 decouples the vertical movement of the offshore building model through its own vertical movement, ensuring that the clamping component 2 can follow the The loading point of the tested marine building model is moved.

Rotational decoupling component 4 is used to decouple the rotational constraints to meet the requirements of the tilt and deflection of the tested marine building model, and to ensure that the tested marine building model can be used in the soil without additional constraints. free deformation.

The rotation decoupling assembly 4 includes a rotating part 41 and a rotating matching part 42 . The rotating matching portion 42 is connected with the sliding matching portion 32 , and the rotating portion 41 is rotatably connected with the rotating matching portion 42 . At least a part of the rotating part 41 is spherical, and the spherical part of the rotating part 41 is embedded in the rotating matching part 42 . Specifically, one end of the rotating part 41 is a joint ball, and the rotating matching part 42 is a groove matched with the joint ball, so as to realize rotation decoupling. The other end of the rotating part 41 is a support arm 43 connected with the joint ball. The support arm 43 is provided with a groove for connecting with the loading surface of the dynamic loading device 6 to transmit the load.

When the measured marine building model is tilted or deflected, the rotation decoupling component 4 decouples the rotation of the marine building model through its own rotation, ensuring that the clamping component 2 can follow the measured marine structure. The loading point of the building model is moved.

Under the joint action of the clamping component 2, the vertical decoupling component 3, and the rotational decoupling component 4, the stable connection between the load decoupling device 1 and the measured marine building model during the deformation process is realized. When multiple load decoupling devices 1 are used, the load decoupling device 1 can make the relative position between the loading points constant during the deformation process of the measured offshore building model, which is convenient for any arbitrary operation under the condition that the centrifuge does not rotate. Simulate the combined action of three loads of ocean wind, wave and current.

Preferably, at least two of the hoop are provided, and they are parallel to each other. The two hoops are respectively arranged at both ends of the sliding rod, and are respectively connected with the loading points of the tested marine construction model, so as to ensure the constant relative position between the loading points.

Preferably, the size of each part of the load decoupling device 1 is determined according to the size of the measured offshore structure and the size of the dynamic loading device 6 .

The clamping diameter of the clamping slot 21 is not less than the diameter of the loading point of the tested marine building model. The length of the sliding part 31 is not less than the settlement distance of the loading point of the tested marine building model. The length of the sliding fitting portion 32 in the sliding direction is not less than the length of the loading surface of the dynamic loading device 6 along the vertical direction. The diameter of the rotating portion 41 is not less than the length of the loading surface of the dynamic loading device 6 along the vertical direction.

The specific process of determining the size of the load decoupling device 1 is as follows:

S101: Determine the actual size of the offshore structure.

The actual size of the loading point of the offshore structure is the diameter D ₁ of the loading point and the settlement H ₁ of the loading point.

S102: Determine the appropriate scale N according to the test conditions (such as the size of the model box, the size of the centrifuge, the complexity of the prototype research problem, etc.). For example N =60.

S103: Determine the size of the loading point corresponding to the marine building model.

The diameter D of the loading point of the marine building model, D = D ₁ / N .

The settlement distance H at the loading point of the marine building model, H = H ₁ / N .

S104: Determine the size of the load decoupling device 1.

The length T of the loading surface of the dynamic loading device 6 in the vertical direction is measured.

Hoop diameter D ₀ , D ₀ = D = D ₁ / N .

The length of the slider (the movable length of the slider) H ₀ , H ₀ ≥ H=H ₁ /N .

The length K ₀ of the slider along the vertical movement direction, K ₀ ≥ T .

Joint ball diameter M ₀ , M ₀ ≥ T .

Embodiment 2

Referring to Figures 1 to 4, an embodiment of an ocean wind, wave and current centrifugal model test system includes a plurality of load decoupling devices 1, and further includes:

The centrifugal component is used for placing the tested marine building model and applying centrifugal force to the tested marine building model. The centrifuge assembly includes a model box for placing the tested marine building model, and a centrifuge for placing the model box.

The dynamic loading device 6 includes a sea wind dynamic loading device, an ocean wave dynamic loading device, and an ocean current dynamic loading device. The sea wind dynamic loading device is used for loading the sea wind load, the sea wave dynamic loading device is used for loading the sea wave load, and the sea current dynamic loading device is used for loading the sea current load.

One end of the load decoupling device 1 is connected to the measured marine building model, and the other end is connected to the sea wind dynamic loading device, the ocean wave dynamic loading device, and the ocean current dynamic loading device. Preferably, three load decoupling devices 1 are provided, and the three load decoupling devices 1 are respectively connected to the sea wind dynamic loading device, the ocean wave dynamic loading device, and the ocean current dynamic loading device. Further, a plurality of the load decoupling devices 1 are connected to the measured marine building model along the height direction, that is, the three load decoupling devices 1 are different from the measured marine building model in order from top to bottom. High load point connection. The centrifugal assembly is activated, and at least one of the sea wind dynamic loading device, the ocean wave dynamic loading device, and the ocean current dynamic loading device applies a load to the tested marine building model through the load decoupling device 1 to simulate ocean currents, ocean waves, The combined action of one or more loads in the sea breeze.

The specific process of the ocean wind wave current centrifugal model test is as follows:

S201: After determining the similar scale according to the actual situation, make the model of the marine building and the load decoupling device 1 of the corresponding size;

S202: Fill soil samples in the model box and place the marine building model;

S203: Fix the sea wind dynamic loading device, the sea current dynamic loading device, and the sea wave dynamic loading device on the base 5 and install it above the model box;

S204: The sea wind dynamic loading device, the sea current dynamic loading device, and the ocean wave dynamic loading device are connected to the loading point of the tested marine building model through their respective load decoupling devices 1;

S205: Move and fix the assembled model box on the bottom plate of the centrifuge basket, install the test system and conduct safety inspection;

S206: After the inspection is correct, use the remote automatic control method to control the operation in the centrifuge control room, start the centrifuge, and apply one or more of sea wind, sea wave and sea current loads to the tested marine building model according to the test needs, and record test data;

S207: After the centrifuge rotates for a period of time and reaches stability, continue to apply one or more of sea wind, sea wave and sea current loads through the remote control system to simulate the combined effect of sea current, sea waves and sea wind loads, and record the test data. The test is expected to be stopped after the duration.

Among them, the main operation auxiliary machinery is lifting equipment, which is a commonly used device in the existing geotechnical centrifugal model test technology.

The above-mentioned technical scheme of the present invention has the following advantages compared with the prior art:

1. Based on different test requirements, the load decoupling device can simultaneously apply loads of three different mechanical characteristics of sea wind, sea current and sea waves without interfering with each other.

2. By connecting and fixing the clamping component of the load decoupling device with a certain position of the offshore building model, the relative position between the loading points can be guaranteed to be constant.

3. The sliding part and sliding matching part of the load decoupling device can decouple the vertical restraint, provide the vertical movement path, and ensure the settlement requirements of the marine building model.

4. The rotating part and the rotating matching part of the load decoupling device can decouple the rotation constraint to meet the requirements of the inclination and deflection of the marine building model.

5. The load decoupling device has the function of multi-degree-of-freedom decoupling, which can ensure that the model structure can deform freely in the soil without additional constraints.

6. The load decoupling device can gradually apply three different types of loads of sea current, sea wave and sea wind on the premise that the centrifuge does not rotate, and the combination can be adjusted at will according to the test needs.

Obviously, the above-mentioned embodiments are only examples for clear description, and are not intended to limit the implementation manner. For those of ordinary skill in the art, other different forms of changes or modifications can also be made on the basis of the above description. There is no need and cannot be exhaustive of all implementations here. However, the obvious changes or changes derived from this are still within the protection scope of the present invention.

Claims (10)

1. A load decoupling device is characterized in that the device is used for a marine wave flow centrifugal model test and comprises:

the clamping component is used for clamping the measured marine building model;

the vertical decoupling assembly is used for decoupling vertical constraint and comprises a sliding part and a sliding matching part; the sliding part is connected with the clamping assembly, and the sliding matching part is connected with the sliding part in a sliding manner;

the rotational decoupling assembly is used for decoupling rotational constraint and comprises a rotating part and a rotational matching part; the rotating matching part is connected with the sliding matching part, and the rotating part is rotatably connected with the rotating matching part.

2. A load decoupling assembly according to claim 1, wherein at least two of said clamp assemblies are arranged parallel to each other.

3. The load decoupling device of claim 1, wherein the clamping assembly comprises a clamping groove and a fastener, the clamping groove is hooped on the outer periphery of the measured marine building model, and the fastener is used for adjusting the clamping diameter of the clamping groove.

4. The load decoupling device of claim 3, wherein the clamping diameter of the clamping groove is not less than the diameter of the clamped part of the marine structure model to be tested.

5. The load decoupling device of claim 1, wherein the length of the sliding portion is not less than the settling distance of the marine structure model under test.

6. A load decoupling device as claimed in claim 1 wherein the length of the sliding engagement portion in the sliding direction is no less than the length of the dynamic loading means loading surface in the vertical direction.

7. A load decoupling device as in claim 1 wherein at least a portion of said rotating portion is spherical and said spherical portion of said rotating portion is nested within said rotating mating portion.

8. The load decoupling device of claim 7, wherein the diameter of the rotating portion is not less than the vertical length of the dynamic loading device loading surface.

9. A marine wave and current centrifugal model test system, comprising a plurality of load decoupling devices according to any one of claims 1 to 8, further comprising:

the centrifugal component is used for placing the measured marine structure model and applying centrifugal force to the measured marine structure model;

the dynamic loading device comprises a sea wind dynamic loading device, a sea wave dynamic loading device and an ocean current dynamic loading device;

one end of the load decoupling device is connected with the measured marine structure model, and the other end of the load decoupling device is connected with the sea wind dynamic loading device, the sea wave dynamic loading device and the sea current dynamic loading device.

10. The marine storm centrifugal model test system of claim 9, wherein a plurality of said load decoupling devices are connected to said measured marine structure model in a height direction.

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