CN103376194A - Device and method for vibration tests of ship and ocean engineering local structure - Google Patents
Device and method for vibration tests of ship and ocean engineering local structure Download PDFInfo
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- CN103376194A CN103376194A CN201210120860XA CN201210120860A CN103376194A CN 103376194 A CN103376194 A CN 103376194A CN 201210120860X A CN201210120860X A CN 201210120860XA CN 201210120860 A CN201210120860 A CN 201210120860A CN 103376194 A CN103376194 A CN 103376194A
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Abstract
The invention provides a device and method for vibration tests of a ship and ocean engineering local structure. The device for the vibration tests of the ship and ocean engineering local structure comprises an installing base and at least one acceleration sensor, wherein the installing base is provided with a body and a foot portion arranged at the bottom of the body, the foot portion can be vertically placed on the test surface of the ship and ocean engineering local structure, the acceleration sensor is detachably installed on the body of the installing base, and the natural frequency of the device for the vibration tests of the ship and ocean engineering local structure keeps away from the range of test frequencies of the vibration tests. The method for the vibration tests of the ship and ocean engineering local structure comprises the steps that a plurality of the devices for the vibration tests are placed on the roughly-horizontal test surface of the ship and ocean engineering local structure to be tested. The device and method for the vibration tests of the ship and ocean engineering local structure can greatly improve the installing efficiency of the acceleration sensor, and can rapidly, reliably and conveniently realize the vibration tests of the ship and ocean engineering local structure.
Description
Technical field
The present invention relates to test unit and the method for boats and ships and oceanographic engineering, special relevant with vibration testing device and the method for a kind of X/Y/Z three axial boats and ships and oceanographic engineering partial structurtes.
Background technology
The partial structurtes vibration of boats and ships and the oceanographic engineering such as drilling platform is when sea examination actual state, what produce is the compound vibration of three directions of X/Y/Z, usually, the vibration of boats and ships and oceanographic engineering sea examination program requires to realize within a certain period of time the data acquisition of hundreds of points.The way of existing structural vibration test is normally: adopt the three-dimensional acceleration transducer, and bonding between three-dimensional acceleration transducer and the substrate as measurand; Perhaps, adopt unidirectional acceleration transducer, connect by the magnetic absorbing seat magnetic is attached between the substrate of unidirectional acceleration transducer and measurand, so, each sampled point need to be axial by three of X/Y/Z, carries out three test/samplings.Existing way has the following disadvantages: a, for bonding way, because using bonding agent and substrate bonding installs, such single test, just need repeatedly hundreds of the circulation to smear the process of bonding agent-bonding-inspection affirmation bonding strength-data acquisition-dismounting inferiorly, waste time and energy, work efficiency is lower, and occurs because of the bonding not firm appearance that causes test error easily; B, for the attached mode that connects of magnetic, only can be applicable to substrate and be the occasion of the metal materials such as steel construction, can not be applicable to a large amount of situations that adopt the nonmetallic materials members such as life zone of boats and ships and oceanographic engineering; C, no matter be the attached mode that connects of bonding way or magnetic, all can't realize fast, reliable with make overall plans easily, at the appointed time, arrange to be difficult to finish the work under the prerequisite of workload.
Summary of the invention
The technical problem to be solved in the present invention is to overcome the deficiency that above-mentioned prior art exists, and proposes vibration testing device and the method for a kind of boats and ships and oceanographic engineering partial structurtes, can be fast, reliably and realize easily the vibration test of partial structurtes.
The present inventor finds by research, by a mount pad is set, its structure is designed, can be attached on this mount pad by degree of will speed up sensor, and can with this mount pad together with the acceleration transducer of installing on it easily, carry out the laying of acceleration transducer in the mode of putting at the test surfaces of the approximate horizontal of tested object, lay efficient thereby greatly improve; And, by this mount pad is designed together with material, shape and the physical dimension of installing the acceleration transducer on it, can make easily this mount pad avoid the test frequency scope of vibration test together with the natural frequency of acceleration transducer of installing on it, thus the reliability of lifting test.
The technical scheme that the present invention is directed to above-mentioned technical matters and propose comprises, the vibration testing device of a kind of boats and ships and oceanographic engineering partial structurtes is proposed, comprise: a mount pad, it has a body and is arranged on a foot of this body below, this vibration testing device can be stood up test surfaces in boats and ships and oceanographic engineering partial structurtes by this foot; At least one acceleration transducer removably is installed on the body on this mount pad; The natural frequency of this vibration testing device is to avoid the test frequency scope of vibration test.
This body has respectively three installed surfaces perpendicular to the X-Y-Z axle, with this at least one acceleration transducer of correspondence installing.
In one embodiment, the number of acceleration transducer is one, and it is installed in the end face perpendicular to Z axis of this body.
In another embodiment, the number of acceleration transducer is three, is installed in respectively the end face perpendicular to Z axis of this body, perpendicular to the side of Y-axis and perpendicular to the side of X-axis.
This at least one acceleration transducer is to be bonded on this body; Perhaps, this body is metal material, and this at least one acceleration transducer is that magnetic absorption is on this body.
This body is cube, and three installed surfaces of this body are respectively arranged with a threaded hole to cooperate the installing of acceleration transducer.
The test frequency scope of this vibration test is 1-100Hz.
The quality of this body is roughly 1Kg.
This foot comprises that vertically to three supporting legs of downward-extension, those supporting legs are height-adjustable, and every supporting leg comprises a base portion; One mating part is extended upward by this base portion, and it is right cylinder, and its upper end is in order to regulate the thread segment of height; And a support portion, being extended downwards by this base portion, it is cone down.
The technical scheme that the present invention is directed to above-mentioned technical matters and propose also comprises, the vibration testing method of a kind of boats and ships and oceanographic engineering partial structurtes is proposed, comprise: with several aforesaid vibration testing devices, its horizontal tilt angle that is placed in boats and ships to be tested and oceanographic engineering partial structurtes is not more than on the test surfaces of 10 degree.
Compared with prior art, the vibration testing device of boats and ships of the present invention and oceanographic engineering partial structurtes and method, by a mount pad is set dexterously, degree of will speed up installation of sensors thereon, and make this mount pad be attached to test point with the form of putting, can greatly improve the installing efficient of acceleration transducer, can be fast, reliable and realize easily the vibration test of partial structurtes.
Description of drawings
Fig. 1 is the structural representation of vibration testing device embodiment one of the present invention and measurand.
Fig. 2 is the structural representation of the body of mount pad among the vibration testing device embodiment one of the present invention.
Fig. 3 is the structural representation of the supporting leg of mount pad among the vibration testing device embodiment one of the present invention.
Fig. 4 is the structural representation of vibration testing device embodiment two of the present invention and measurand.
Fig. 5 is the schematic flow sheet of vibration testing method of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the present invention is given further elaboration.
Referring to Fig. 1, the vibration testing device embodiment one of boats and ships of the present invention and oceanographic engineering partial structurtes roughly comprises: a mount pad 80, the foot that it has a body 1 and is arranged on this body 1 below can stand up this vibration testing device test surfaces in boats and ships and oceanographic engineering partial structurtes by this foot; One acceleration transducer 40 removably is installed on the body 1 on this mount pad 80; The natural frequency of this vibration testing device is to avoid the test frequency scope of vibration test.Wherein, these boats and ships and oceanographic engineering partial structurtes comprise steel construction 10 and the floor 20 that is laid on this steel construction 10.This test frequency scope is 1-100Hz.This acceleration transducer 40 is to be bonded on this body 1; Perhaps, this body 1 is metal material, and this acceleration transducer 40 is that magnetic absorption is on this body 1.
Referring to Fig. 2, the body 1 of mount pad 80 is cube among the vibration testing device embodiment one of the present invention, and this body 1 has installed surface 11 perpendicular to X-axis, perpendicular to the installed surface 12 of Y-axis and perpendicular to the installed surface 13 of Z axis.This acceleration transducer is the three-dimensional acceleration transducer, and it is installed on the end face 13 perpendicular to Z axis of this body 1.In order to make things convenient for the reliable installing of acceleration transducer 40, be respectively arranged with a threaded hole 111,121,131 on three installed surfaces 11,12,13 of this body 1.In a specific embodiment, this body is steel construction, and quality is roughly 1Kg, and volume is roughly 50*50*50mm
3In other specific embodiment, this body also can be other shapes, such as rectangular parallelepiped, again such as right cylinder.When the less size of needs, can adopt copper, plumbous and so on the larger material of proportion, when allowing larger size, then can adopt aluminium even non-metallic material.
Referring to Fig. 3, mount pad 80 foots comprise three supporting legs 2 among the vibration testing device embodiment one of the present invention, and those supporting legs 2 are height-adjustable, and every supporting leg 2 comprises a base portion 21; One mating part 22 is extended upward by this base portion 21, and it is right cylinder, and its upper end 221 is in order to regulate the thread segment of height; And a support portion 23, being extended downwards by this base portion 21, it is cone down, the vertex of a cone 231 is the foothold.This foot structure can be simulated the human foot to the force situation on ground.Under normal conditions, namely: in the environment that human body can bear, vibration frequency is at 1-80Hz, and vibration acceleration is at 10m/s
2About in, when the inclined degree on floor 20 meets requiring of extra large strip spare (generally the angle of inclination is not more than 10 degree), rely on the contact of these three vertex of a cones 231, vibration testing device can be attached to test point securely, and the phenomenon such as can not occur sliding, beat.
Referring to Fig. 4, the vibration testing device embodiment two of boats and ships of the present invention and oceanographic engineering partial structurtes mainly is with the difference of above-described embodiment one: acceleration transducer by a three-dimensional become three unidirectional, comprise be installed in this body 1 perpendicular to the Z axis acceleration transducer on the end face 13 of Z axis, perpendicular to the X-axis acceleration transducer on the side 11 of Y-axis and perpendicular to the Y-axis acceleration transducer on the side 12 of Y-axis.
Referring to Fig. 5, the flow process of the vibration testing method of boats and ships of the present invention and oceanographic engineering partial structurtes roughly may further comprise the steps: S1: with reference to the requirement of standard, technical specification book, overall procedure, the target of confirmed test; S2: formulate extra large method for testing, the confirmed test flow process; S3: with the form of putting, carry out the installing of the vibration testing device of multiple spot; S4: multi-point signal collection and data are processed; S5: analysis result; S6: compare with standard, need to reform? be, return step S3, otherwise, or be the test meet the demands, or be from too away from, at this moment current necessity of not reforming all be to turn to step S7; S7: provide report.
Wherein, two corresponding steps: S2-1 that also comprise matching step S2: determine the depth of water, wind direction, wind-force and ballasted condition; S2-2: time and the operating mode of determining defined.
Corresponding steps a: S3-1 who also comprises matching step S3 and S4: instrument calibration.
The difference of vibration testing method of the present invention and existing vibration testing method is mainly reflected in step S3, method of the present invention, according to test condition, no matter be that form by adopting above-mentioned vibration testing device embodiment one is to install a three-dimensional acceleration transducer 40, perhaps, or the form by adopting above-mentioned vibration testing device embodiment two can both with the form of putting, be carried out the installing of vibration testing device to install three unidirectional acceleration transducers 50,60,70 combination in any.And need not to each test point as existing, adopt mode bonding or that magnetic is attached to carry out the installing of vibration testing device.Because other steps, belong to the technology of existing maturation, with technology of the present invention without relating to, do not repeat them here.
Using a specific embodiment of vibration testing method of the present invention, is on-the-spot in the examination of the sea of certain deep water semi-submersible drilling platform, and the physical dimension of this drilling platform has, overall length 104.5m; Molded breadth 65.0m; Moldeed depth 36.85m; Deck erection 81m*65m*7.6m, wherein the living quarters is 20m*65m*7.6m, the machinery district is 60m*65m*7.6m; Column 13m*13m*19.5m; Floating drum 104.5m*13m*9.75m.Partial structurtes vibrations sampled point add up to 186, each sampled point has three directions of X/Y/Z, sampled point spreads all over the deck erection of whole drilling platform, comprises living quarters, machinery district and open deck etc.Vibration testing device shown in Figure 1 is the situation that is laid in accommodation.Signal wire 401 and the front end data acquisition equipment connection of three-dimensional acceleration transducer 40 in setting time, can collect real operating mode accurately.
Using another specific embodiment of vibration testing method of the present invention, is on-the-spot in the examination of the sea of certain deep water semi-submersible drilling platform, and the drilling platform in its structure and the above-mentioned specific embodiment is similar.Partial structurtes vibrations sampled point add up to 131, each sampled point has three directions of X/Y/Z, sampled point spreads all over the deck erection of whole drilling platform, comprising living quarters, machinery district and open deck etc.Vibration testing device shown in Figure 4 is the situation that is laid in the cabin, living quarters.Three unidirectional acceleration transducers 50,60,70 signal wire 501,601,701 and the front end data acquisition equipment connection in setting time, can collect real operating mode accurately.
Need to prove, because structurally there are a lot of common parts in boats and ships and drilling platform, vibration testing device of the present invention and method are not limited to above-mentioned drilling platform, also can be applied on engineering ship and the general boats and ships, so that in the similar vibration environment of other industry.
Compared with prior art, boats and ships of the present invention and oceanographic engineering partial structurtes vibration testing device and method have the following advantages: when needs separate X/Y/Z each when carrying out data acquisition and process, can switch at three direction straight-line oscillation of X/Y/Z test bay fast, save the operations such as the bonding installation of bonding agent, magnetic absorbing seat installation or studs installation, can greatly improve the efficient of vibration test, the multi-point sampling when especially being embodied in the examination of boats and ships and oceanographic engineering sea; Can collect truly three directions of X/Y/Z and make simultaneously time spent compound vibration signal, reappear exactly real operating mode, more near the vibration environment of natural reality, thereby greatly improve vibration test result's precision; By body 1 being adopted the metal material such as steel, can realize easily being connected of three directional acceleration sensors of X/Y/Z simultaneously, thereby on the fitting-out floor of boats and ships and oceanographic engineering, can transmit accurately the vibration force that comes from vibration source, with warranty test precision and test efficiency; By substituting the laying mode of transmission with the mode of putting, can be under official hour and working condition, in the sea examination on-the-spot, the purpose that reaches multi-point data acquisition that can precise and high efficiency.
Foregoing; it only is preferred embodiment of the present invention; be not for restriction embodiment of the present invention; those of ordinary skills are according to main design of the present invention and spirit; can carry out very easily corresponding flexible or modification, so protection scope of the present invention should be as the criterion with the desired protection domain of claims.
Claims (10)
1. the vibration testing device of boats and ships and oceanographic engineering partial structurtes is characterized in that, comprising:
One mount pad, it has a body and is arranged on the foot of this body below, this vibration testing device can be stood up test surfaces in boats and ships and oceanographic engineering partial structurtes by this foot;
At least one acceleration transducer removably is installed on the body on this mount pad;
The natural frequency of this vibration testing device is to avoid the test frequency scope of vibration test.
2. according to vibration testing device claimed in claim 1, it is characterized in that this body has respectively three installed surfaces perpendicular to the X/Y/Z axle, with this at least one acceleration transducer of correspondence installing.
3. according to vibration testing device claimed in claim 2, it is characterized in that the number of acceleration transducer is one, it is installed in the end face perpendicular to Z axis of this body.
4. according to vibration testing device claimed in claim 2, it is characterized in that the number of acceleration transducer is three, be installed in respectively the end face perpendicular to Z axis of this body, perpendicular to the side of Y-axis and perpendicular to the side of X-axis.
5. according to vibration testing device claimed in claim 1, it is characterized in that this at least one acceleration transducer is to be bonded on this body; Perhaps, this body is metal material, and this at least one acceleration transducer is that magnetic absorption is on this body.
6. according to vibration testing device claimed in claim 2, it is characterized in that this body is cube, three installed surfaces of this body are respectively arranged with a threaded hole to cooperate the installing of acceleration transducer.
7. according to vibration testing device claimed in claim 1, it is characterized in that the test frequency scope of this vibration test is 1-100Hz.
8. according to vibration testing device claimed in claim 1, it is characterized in that the quality of this body is roughly 1Kg.
9. according to vibration testing device claimed in claim 1, it is characterized in that this foot comprises that vertically to three supporting legs of downward-extension, those supporting legs are height-adjustable, every supporting leg comprises a base portion; One mating part is extended upward by this base portion, and it is right cylinder, and its upper end is in order to regulate the thread segment of height; And a support portion, being extended downwards by this base portion, it is cone down.
10. the vibration testing method of boats and ships and oceanographic engineering partial structurtes, it is characterized in that, comprise:, such as the arbitrary described vibration testing device of claim 1 to 9 its horizontal tilt angle that is placed in boats and ships to be tested and oceanographic engineering partial structurtes is not more than on the test surfaces of 10 degree with several.
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Cited By (3)
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| CN104215418A (en) * | 2014-09-16 | 2014-12-17 | 上海交通大学 | Ocean platform model multiple target physical property determination device |
| CN106769556A (en) * | 2017-03-17 | 2017-05-31 | 西南交通大学 | Reliability test workbench and system that test metal coupons vibration is coupled with fatigue |
| CN113932916A (en) * | 2021-10-25 | 2022-01-14 | 中国舰船研究设计中心 | Device and method for mounting vibration sensor of ship outboard composite material structure |
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| CN106769556A (en) * | 2017-03-17 | 2017-05-31 | 西南交通大学 | Reliability test workbench and system that test metal coupons vibration is coupled with fatigue |
| CN106769556B (en) * | 2017-03-17 | 2023-09-29 | 西南交通大学 | Reliability test workbench and system for testing vibration and fatigue coupling of metal test block |
| CN113932916A (en) * | 2021-10-25 | 2022-01-14 | 中国舰船研究设计中心 | Device and method for mounting vibration sensor of ship outboard composite material structure |
| CN113932916B (en) * | 2021-10-25 | 2024-04-02 | 中国舰船研究设计中心 | Device and method for installing vibration sensor of ship outboard composite material structure |
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