CN107894329A - The flexible connection experimental rig and principle of Very large floating structure based on anti-torsion mechanism - Google Patents

Abstract

The invention discloses a flexible connection test device and principle of an ultra-large floating body based on a torsion spring, including a base, a torsion spring, a damping device, a connection nut and an adjusting washer. The number of the bases is two, and two The bases are arranged in parallel on the upper and lower sides; each of the bases is provided with a number of symmetrical perforations, and a number of torsion springs and a number of damping devices are vertically arranged between the two bases through the perforations, and the adjustment is placed in the perforations. washer. The end of the torsion spring and the base, the end of the damping device and the base are respectively fixed up and down on the two bases through connecting nuts, and a torsion spring and a damping device form a group, and there are several Group. The invention is simple in structure, easy to maintain, and can flexibly adjust the type and number of torsion springs and damping devices according to actual needs, so as to achieve the purpose of freely adjusting stiffness and damping, and can more flexibly and effectively limit two independent floating structures The relative movement between the object modules.

Description

Experimental device and principle of flexible connection of super large floating body based on torsion-resistant mechanism

technical field

The invention relates to a device in the technical field of marine engineering, in particular to a flexible connection test device and principle of an ultra-large floating body based on a torsion-resistant mechanism.

Background technique

Due to the huge size and different uses of super-large floating bodies, their structure must be modularized from the perspective of maintenance and use. In the complex marine environment, the super-large floating body bears huge wind load and wave load, and the elastic deformation of the connector is extremely large. Therefore, the performance of the connector between modules is particularly important. The connection performance of the connector is very important for the safety of the super-large floating body. performance and stability have a significant impact.

In order to accurately obtain the overall motion response performance of a super-large floating body connected by multiple modules using connectors, in addition to carrying out a large number of numerical calculations, it generally needs to be verified by means of model tests. The connecting device between the ultra-large floating body modules currently used is basically determined by a large number of numerical simulations before the test and processed on the basis of various parameters. However, in actual use, it is difficult to adjust the parameters (stiffness and damping) of these connecting devices according to the requirements of the model test, so it is difficult to achieve the ideal test effect.

Contents of the invention

The object of the present invention is to address the deficiencies in the prior art, and provide a flexible connection test device and principle of an ultra-large floating body based on a torsion-resistant mechanism, so as to solve the problems in the prior art.

The technical problem solved by the present invention can adopt following technical scheme to realize:

The flexible connection test device of the super large floating body based on the anti-torsion mechanism, including the base, the anti-torsion mechanism, the connection nut and the adjustment washer, the said base is a rectangular flat plate, the number is two, and the two bases are arranged in parallel on the upper and lower sides sides. The anti-torsion mechanism is vertically arranged between the two bases through the perforation, and several groups of anti-torsion mechanisms are provided, and an adjusting washer is placed in the perforation. Both ends of the anti-torsion mechanism are fixed on two bases through connecting nuts, and the anti-torsion mechanism includes an anti-torsion spring and a damping device.

Further, the inner wall of the perforation has no thread, and the two perforations form a group, and there are several groups in total. There is a small interval between the two perforations in one group, and a large interval between each group of perforations, and the upper and lower two Each group of perforations of the base is arranged symmetrically.

Further, both ends of the torsion spring and the damping device are engraved with threads, and the torsion springs in each group are arranged on the same side of the damping device.

Further, each damping device adopts a hydraulic damper, a pneumatic damper or a two-way cylinder-piston damper.

Based on the principle of the flexible connection test device of the super-large floating body based on the torsion-resistant mechanism, several flexible connection test devices of the super-large floating body based on the torsion-resistant mechanism are connected between two independent super-large floating body test devices. The anti-torsion spring for resisting bending moment and torque and the damping device for buffering tension and compression stress hinder and limit the relative movement between two independent floating structure modules.

Before the simulation test, the flexible connection test device of the ultra-large floating body based on the torsion mechanism needs to measure its tensile, compression, bending, and torsional rigidity to confirm the type and number of torsion springs selected, and to confirm the damping device. Type and number, so as to meet the requirements of the simulation test for connector stiffness and damping. There are six groups of anti-torsion mechanisms, including six anti-torsion springs and six damping devices. There are two bases, twelve groups of perforations, and a total of twenty-four holes; Six groups are respectively arranged through several perforations.

Compared with the prior art, the beneficial effects of the present invention are as follows:

The invention is simple in structure, easy to maintain, and can flexibly adjust the type and number of torsion springs and the type and number of damping devices according to actual needs, and can freely adjust its stiffness and damping parameters to better meet the requirements of model tests. The relative movement between two independent floating structure modules can be restricted more flexibly and effectively.

This advantage can be used to deal with the situation that the rigidities of multiple super-large floating body modules are different from one module to another, and this situation has a high probability of appearing in actual sea conditions. In addition, it plays an important auxiliary role in the research of ultra-large floating body connectors, and can verify the numerical calculation results through flexible model tests, and provide guidance for practical engineering applications.

Description of drawings

Fig. 1 is the front view of the flexible connection test device of the ultra-large floating body based on the torsion mechanism according to the present invention.

Fig. 2 is a left view of the flexible connection test device of the ultra-large floating body based on the anti-torsion mechanism according to the present invention.

Fig. 3 is a right view of the flexible connection test device of the ultra-large floating body based on the anti-torsion mechanism according to the present invention.

Fig. 4 is a top view of the flexible connection test device of the ultra-large floating body based on the torsion mechanism according to the present invention.

Fig. 5 is a simulation test effect diagram of the flexible connection test device of the ultra-large floating body based on the torsion mechanism according to the present invention.

Fig. 6 is a working principle diagram of the flexible connection test device of the ultra-large floating body based on the anti-torsion mechanism according to the present invention.

Detailed ways

In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.

Referring to Fig. 1 to Fig. 6, the flexible connection test device of the ultra-large floating body based on the torsion-resistant mechanism according to the present invention includes a base 1, a torsion-resistant mechanism, a connecting nut 4 and an adjusting washer 5, and the base 1 is rectangular There are two flat plates, and two bases 1 are arranged on the upper and lower sides in parallel. The anti-torsion mechanism is vertically arranged between the two bases 1 through the perforation 6, and several groups of anti-torsion mechanisms are provided, and an adjusting washer is placed in the perforation. The two ends of the anti-torsion mechanism are fixed on two bases 1 by connecting nuts 4 , and the anti-torsion mechanism includes an anti-torsion spring 2 and a damping device 3 .

There is no thread on the inner wall of the perforation 6, so that the torsion spring 2 and the damping device 3 can freely pass through, and the two perforations 6 form a group, and several groups are provided, and there are two perforations 6 in one group. Small intervals, large intervals between each group of perforations 6 , and each group of perforations 6 on the upper and lower bases 1 is arranged symmetrically.

Both ends of the anti-torsion spring 2 and the damping device 3 are engraved with threads, and the anti-torsion springs 2 in each group are all arranged on the same side of the damping device 3 .

Each damping device 3 adopts a hydraulic damper, a pneumatic damper or a two-way cylinder-piston damper, which can flexibly provide various damping sizes.

Based on the principle of the flexible connection test device of the super-large floating body based on the torsion-resistant mechanism, several flexible connection test devices of the super-large floating body based on the torsion-resistant mechanism are connected between two independent super-large floating body test devices. The anti-torsion spring 2 is used for resisting bending moment and torque, and the damping device 3 is used for buffering tension and compression stress, hindering and limiting the relative movement between two independent floating structure modules.

When the super-large floating body moves in the waves, each module receives different wave forces, and then there will be a tendency to move closer or farther away. The connecting device restricts the relative movement of the modules through the left and right bases, the torsion spring 2 and the damping device 3 in the middle. When the modules tend to approach or quickly move away, the damping device 3 absorbs the impact energy and quickly reduces their relative movement speed, so as to avoid collision accidents or module separation accidents. When there is a relative rolling tendency among the modules, the torsion spring 2 is deformed to generate a large torque to resist the deformation. Therefore, during the working process of the connector, the deformation of the torsion spring 2 itself acts continuously, the damper absorbs energy, and buffers the impact load, so as to reduce the relative movement tendency between adjacent modules of the super-large floating body.

Before carrying out the simulation test, the present invention needs to confirm the type and number of the torsion spring 2 selected by measuring its tension, compression, bending and torsional rigidity, and confirm the type and number of the damping device 3, thereby meeting the requirements of the simulation test It is required that the devices are all made of materials with good anti-oxidation and corrosion resistance to adapt to the adverse consequences caused by environmental factors such as immersion in water. According to the requirements of this simulation test, there are six anti-torsion springs 2 and damping devices 3 respectively, two bases 1, twelve groups of perforations 6, and a total of twenty-four holes; Six through several perforations 6 are inserted between the two bases 1 .

In the present invention, the ultimate bearing capacity requirement of the connection test device can be selected according to the characteristics of the super-large floating body, the scale ratio of the model test, the actual work, and the living sea conditions, and can generally be determined by numerical calculation. For example, for a single-module ultra-large floating body with a displacement of 100,000 tons and a significant wave height of 5 meters in the survival sea state, the maximum axial load of the connector can be obtained through numerical calculations up to 50,000 tons, and the model scale ratio is selected as 1/ 100, equivalent to the model scale, the connection test device needs to be able to bear an axial force of 50 kg, and this requirement should be considered when actually designing and manufacturing the device.

The basic principles and main features of the present invention and the advantages of the present invention have been shown and described above. Those skilled in the industry should understand that the present invention is not limited by the above-mentioned embodiments. What are described in the above-mentioned embodiments and the description only illustrate the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will also have Various changes and improvements all fall within the scope of the claimed invention. The protection scope of the present invention is defined by the appended claims and their equivalents.

Claims (5)

1. The flexible connection test device of the ultra-large floating body based on the anti-torsion mechanism is characterized in that: it comprises a base, an anti-torsion mechanism, a connecting nut and an adjusting washer, the base is a rectangular flat plate, and the number is two, and two The base is arranged on the upper and lower sides in parallel, and several perforations are provided on the base; the anti-torsion mechanism is vertically arranged between the two bases through the perforation, and several groups of anti-torsion mechanisms are provided, and adjusting washers are placed in the perforation; Both ends of the anti-torsion mechanism are fixed on two bases through connecting nuts, and the anti-torsion mechanism includes an anti-torsion spring and a damping device. 2. The flexible connection test device based on the torsion-resistant mechanism of the super-large floating body according to claim 1, characterized in that: the inner wall of the perforation has no thread, and two perforations form one group, and there are several groups, one There is a small interval between two perforations in a group, a large interval between each group of perforations, and each group of perforations on the upper and lower bases is arranged symmetrically. 3. the flexible connection test device based on the super large floating body of the torsion mechanism according to claim 1, characterized in that: the ends of the two ends of the torsion spring and the damping device are all engraved with threads, and the anti-torsion in each group The torsion springs are all arranged on the same side of the damping device. 4. The flexible connection test device for super-large floating bodies based on torsion-resistant mechanism according to claim 1, characterized in that each damping device adopts a hydraulic damper, a pneumatic damper or a two-way cylinder-piston damper. 5. The principle of the flexible connection test device based on the super-large floating body of the anti-torsion mechanism is characterized in that: several flexible connection test devices of the super-large floating body based on the torsion-resistant mechanism are connected to two independent super-large floating body test devices Between; the anti-torsion spring for resisting bending moment and torque and the damping device for buffering tension and compression stress hinder and limit the relative movement between two independent floating structure modules; Before the simulation test, the flexible connection test device of the super-large floating body based on the torsion mechanism needs to measure its tensile, compression, bending, and torsional stiffness to confirm the type and number of torsion springs selected, and to confirm the damping device. Type and number, so as to meet the requirements of the simulation test for connector stiffness and damping; the torsion mechanism has six groups, including six torsion springs and six damping devices, two bases, twelve groups of perforations, There are twenty-four holes in total; the torsion-resistant mechanism is inserted into six groups through several through holes respectively between the two bases.