CN101839797B - Device for testing transverse impact rigidity and damping characteristic of pipe joint for naval vessel - Google Patents

Device for testing transverse impact rigidity and damping characteristic of pipe joint for naval vessel Download PDF

Info

Publication number
CN101839797B
CN101839797B CN2010101543327A CN201010154332A CN101839797B CN 101839797 B CN101839797 B CN 101839797B CN 2010101543327 A CN2010101543327 A CN 2010101543327A CN 201010154332 A CN201010154332 A CN 201010154332A CN 101839797 B CN101839797 B CN 101839797B
Authority
CN
China
Prior art keywords
adapter
rigidity
valve
damping characteristic
pipe
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN2010101543327A
Other languages
Chinese (zh)
Other versions
CN101839797A (en
Inventor
谌勇
张志谊
华宏星
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shanghai Jiaotong University
Original Assignee
Shanghai Jiaotong University
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shanghai Jiaotong University filed Critical Shanghai Jiaotong University
Priority to CN2010101543327A priority Critical patent/CN101839797B/en
Publication of CN101839797A publication Critical patent/CN101839797A/en
Application granted granted Critical
Publication of CN101839797B publication Critical patent/CN101839797B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Abstract

The invention relates to a device for testing the transverse impact rigidity and the damping characteristic of a pipe joint for a naval vessel, belonging to the field of ocean engineering technology. A bracket is fixed with a cross beam; a first adapter and a second adapter are respectively sealed and fixed at the two ends of the pipe joint to be tested by flange plates; a disc mass block is sealed and fixed in the middle of the pipe joint to be tested by a flange plate; the first adapter and the second adapter are respectively fixed on the bracket; a displacement sensor is connected with the disc mass block for transmitting a displacement signal; an acceleration transducer is connected with the disc mass block for transmitting an acceleration signal; the first adapter is connected with a first valve, and the second adapter is connected with a second valve; a pump is positioned on the second valve; and a pressure gauge is arranged on the first adapter. The device can accurately and rapidly confirm the transverse impact rigidity and the damping coefficient of various different types of pipe joints for the naval vessel by fewer times of test and simple analysis; meanwhile, the device considers about the influence of a working medium and pressure in a pipeline for relevant parameters when in practical work of the joint.

Description

The warship proving installation of pipe adapter side knock rigidity and damping characteristic
Technical field
What the present invention relates to is a kind of device of Marine engineering technical field, in particular a kind of warship proving installation of pipe adapter side knock rigidity and damping characteristic.
Background technology
Ship piping system version complexity, distribution span are big, when being subjected to the shock load that underwater blast causes, easily deform, damaged and cause that pipe leakage lost efficacy the safety that jeopardizes personnel on ship vitality and the ship.How effectively designing ship piping system is to make us the very problem of concern to improve its impact resistance.When the naval vessels complex pipeline being carried out shock Response Analysis and prediction, determine that accurately the side knock rigidity and the damping parameter of the pipe adapter self of institute's type selecting is one of key of problem.After having only the stiffness parameters of having known components and parts self accurately, can when design, carry out computational analysis accurately, and carry out appropriate design, layout according to analysis result.
Warship comprises with flexible pipe joint that corrugated tube, elastomer connector, expansion connect and multiple element such as flexibility connection pipe, compare with common steel tube, the geometry complex forms and the material behavior of this class pipe adapter are various, are difficult to single-pass and cross the calculating means and obtain side knock rigidity and damping parameter.And different with common quiet rigidity, shock stiffness has been described the ability of the resistance to deformation that structure shows when being subjected to shock load, general relevant with material strain rate characteristic, so can't test by common envelope test.General proving installation and the corresponding method of neither one all will design corresponding anchor clamps to every kind of pipe adapter usually when these difficult points had caused at present in industry for the test of pipe adapter side knock rigidity, and the test period is long and inconvenient.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art, the proving installation of a kind of warship with pipe adapter side knock rigidity and damping characteristic is provided,, accurately test its side knock rigidity and ratio of damping efficiently at warship flexible pipe joint commonly used.This device have good versatility at multi-form pipe adapter and considered the pipe interior actuating medium and internal pressure for the influence of joint dynamic perfromance.
The present invention is achieved by the following technical solutions, the present invention includes: support, first adapter, second adapter, ring flange, the disk mass, crossbeam, displacement transducer, acceleration transducer, first valve, second valve, pump and tensimeter, wherein: fixed cross beam on the support, first adapter and second adapter are used the two ends of ring flange sealing and fixing at the measured tube joint respectively, use ring flange sealing and fixing disk mass in the middle of the measured tube joint, first adapter and second adapter are separately fixed on the support, displacement transducer links to each other with the disk mass with the transmission displacement signal, acceleration transducer links to each other with the transmission acceleration signal with the disk mass, first adapter links to each other with first valve, second adapter links to each other with second valve, pump is located on second adapter, and tensimeter is located on first adapter.
Being provided with rubber seal in the middle of the described ring flange seals.
Described first adapter is the sealing adaptor head.
Described second adapter is the perforate adapter.
Described displacement transducer links to each other with the external data Acquisition Instrument respectively with acceleration transducer.
If water, actuating medium that wet goods density is bigger are arranged during the pipe adapter real work,, in joint, pour into the corresponding work medium with pump then then with first valve and second valve open.After waiting to fill with, close first valve, and continue to increase working pressure, and monitor current pressure from tensimeter with pump.After waiting to reach scheduled pressure value, close second valve.
Press the position of measured tube joint reality on ship, impact input when determining its work, after guaranteeing that packoff does not have leakage, can carry out impulse test, simultaneously by instantaneous acceleration and displacement on displacement transducer and the acceleration transducer test plate mass.After the test, check whether connection becomes flexible and whether packoff has seepage.
Obtain acting on the inertial force F (t) of disk mass and according to the displacement response y (t) that records the disk mass on the displacement transducer according to the table top impact acceleration, with the shock response characteristic that the damping single-mode system is arranged, try to achieve the rigidity and the damping of equivalent single-mode system again.On this basis, can obtain the equivalent side knock rigidity and the corresponding ratio of damping of measured tube joint according to the elastic beam theory.
The present invention has the following advantages compared to existing technology: with ring flange joint is fixed on the support, for caliber is identical but the pipe adapter that form is different, only need to regulate the installation site and need not renewal part, and for the different joint of caliber, only need change adapter gets final product, guaranteed that proving installation has good versatility, dissimilar warship pipe adapters, all can accurately determine its side knock rigidity and ratio of damping efficiently by the test several times and the simple analysis of negligible amounts on this device; Actuating medium when proving installation has been considered the joint real work simultaneously in the pipeline, pressure are to the influence of correlation parameter.
Description of drawings
Fig. 1 is a structural representation of the present invention;
Fig. 2 is Equivalent Mechanical Model figure of the present invention.
Embodiment
Below embodiments of the invention are elaborated, present embodiment is being to implement under the prerequisite with the technical solution of the present invention, provided detailed embodiment and concrete operating process, but protection scope of the present invention is not limited to following embodiment.
As shown in Figure 1, present embodiment comprises: two measured tube joints 1, testing table 2, support 3, first adapter 4, second adapter 5, ring flange 6, disk mass 7, crossbeam 8, displacement transducer 9, acceleration transducer 10, first valve 11, second valve 12, pump 13 and tensimeter 14, wherein: fixed support 3 on the testing table 2, fixed cross beam 8 on the support 3, first adapter 4 and second adapter 5 are used the two ends of ring flange 6 sealing and fixing at measured tube joint 1 respectively, use ring flange 6 sealing and fixing disk masses 7 in the middle of two measured tube joints 1, first adapter 4 and second adapter 5 are separately fixed on the support 3, displacement transducer 9 is located on the crossbeam 8, the joint of displacement transducer 9 links to each other with disk mass 7 with the transmission displacement signal, acceleration transducer 10 links to each other with the transmission acceleration signal with disk mass 7, first adapter 4 links to each other with first valve 11, second adapter 5 links to each other with second valve 12, pump 13 is located on second adapter 5, and tensimeter 14 is located on first adapter 4.
Described first adapter 4 is sealing adaptor heads, links to each other with measured tube joint 1 and inside communicates and plays sealing function by ring flange 6, and the outer end links to each other with tensimeter 15 by the steel pipe of welding, can the emptying inner air when water filling, when pressurization, then seal fully.
Described second adapter 5 is perforate adapters, links to each other with measured tube joint 1 by ring flange 6, and outer side hole also and is carried out water filling and pressurization by flexible pipe to measured tube joint 1 inside.
Being provided with rubber seal in the middle of the described ring flange 6 seals.
Described displacement transducer 9 links to each other with the data collecting instrument of outside with charge amplifier by Signal transfer box with acceleration transducer 10, and the electric signal that records is carried out record analysis.
Present embodiment medium-height trestle 3 is a L shaped steel frame, and fixation is preferably arranged, and is fixed on the testing table 2 by bolt or welding.
By ring flange 6 joint is fixed on the support 3, for caliber is identical but the pipe adapter that form is different, only need to regulate an installation site and need not renewal part, and for the different joint of caliber, only need change adapter and get final product, guarantee that proving installation has good versatility.
If water, actuating medium that wet goods density is bigger are arranged during the pipe adapter real work, then first valve 11 and second valve 12 are opened, in joint, pour into the corresponding work medium with pump 13 then.After waiting to fill with, close first valve 11, and continue to increase working pressure, and monitor current pressure from tensimeter 14 with pump 13.After waiting to reach scheduled pressure value, close second valve 12.The pump 13 of present embodiment is a hand-rail type pump 13, and pressure control is in preset range preferably.
Press the position of measured tube joint 1 reality on ship, impact input when determining its work, after guaranteeing that packoff does not have leakage, can carry out impulse test, simultaneously by instantaneous acceleration and displacement on displacement transducer 9 and the acceleration transducer 10 test plate masses 7.After the test, check whether the bolt connection becomes flexible and whether packoff has seepage.
As shown in Figure 2, among the Equivalent Mechanical Model figure of present embodiment, a is an equivalent mass, and b is equivalent beam, and c props up the border admittedly.Obtain acting on the inertial force F (t) of disk mass 7 and according to the displacement y (t) that records disk mass 7 on the displacement transducer 9 according to the table top impact acceleration, utilization has the shock response characteristic of damping single-mode system, tries to achieve the rigidity and the damping of equivalent single-mode system.On this basis, can obtain the equivalent side knock rigidity and the corresponding ratio of damping of measured tube joint according to the elastic beam theory.
It is a uniform cross section that measured tube joint 1 is simplified equivalence, and length is the straight beam of L, supposes its bendind rigidity position EJ, and promptly Dui Ying elasticity modulus of materials is E, and cross sectional moment of inertia is J.According to the Deformation Theory of propping up elastic beam admittedly, the rigidity k that two solid measured tube joint 1 acts on simultaneously at intermediate disc mass 7 places eShould be:
k e = 24 EJ L 3
Wherein, L represents the physical length of single pipe adapter.When not considering the nonlinear problem that large deformation causes, system can be reduced to the single-mode system of damping, and its equation of motion is written as:
m e y · · ( t ) + c e y · ( t ) + k e y ( t ) = F ( t )
Wherein, m e, c eAnd k eBe respectively equivalent mass, ratio of damping and rigidity, the displacement of y (t) expression intermediate mass, the some subscript is represented its derivative, respectively corresponding speed and acceleration.F (t) then represents to act on the inertial force on the intermediate mass (containing two ring flanges), depends on impact strength and intermediate mass size.
According to the shock response characteristic that the damping single-mode system is arranged, can determine the rigidity and the damping characteristic of system.At first, measure the time interval Δ t of i response complete cycle, can obtain the period T and the natural frequency f of system according to the time-histories response curve of record:
T = Δt i , f = 1 T
Can try to achieve the equivalent bending stiffness EJ of single pipe adapter on this basis
EJ = k e L 2 12 = π 2 m e f 2 L 2 3
And, at first ask for logarithmic decrement δ in order to try to achieve ratio of damping:
Figure GDA0000020860530000046
Wherein, y nAfter end of input is impacted in expression, n peak value of intermediate mass displacement response.
After obtaining logarithmic decrement δ, can try to achieve dampingratio and ratio of damping c by following formula e:
ζ = δ 4 π 2 + δ 2 , c e＝4πm efζ
Usually in order to make test findings more accurate, can carry out the different test of many times of impact strength, utilize least square method then, find best rigidity and ratio of damping, make the error sum of each time test be minimum.

Claims (6)

1. a warship is with the proving installation of pipe adapter side knock rigidity and damping characteristic, it is characterized in that, comprise: support, first adapter, second adapter, ring flange, the disk mass, crossbeam, displacement transducer, acceleration transducer, first valve, second valve, pump and tensimeter, wherein: fixed cross beam on the support, first adapter is used the outer end of ring flange sealing and fixing at the first measured tube joint, second adapter is used the outer end of ring flange sealing and fixing at the second measured tube joint, use ring flange sealing and fixing disk mass in the middle of two measured tube joints, first adapter and second adapter are separately fixed on the support, displacement transducer links to each other with the disk mass with the transmission displacement signal, acceleration transducer links to each other with the transmission acceleration signal with the disk mass, first adapter links to each other with first valve, second adapter links to each other with second valve, pump is located on second adapter, and tensimeter is located on first adapter.
2. warship according to claim 1 is characterized in that with the proving installation of pipe adapter side knock rigidity and damping characteristic, is provided with rubber seal in the middle of the described ring flange.
3. warship according to claim 1 is characterized in that with the proving installation of pipe adapter side knock rigidity and damping characteristic described first adapter is the sealing adaptor head.
4. warship according to claim 1 is characterized in that with the proving installation of pipe adapter side knock rigidity and damping characteristic described second adapter is the perforate adapter.
5. warship according to claim 1 is characterized in that with the proving installation of pipe adapter side knock rigidity and damping characteristic described support is a L shaped steel frame.
6. warship according to claim 1 is characterized in that with the proving installation of pipe adapter side knock rigidity and damping characteristic described displacement transducer links to each other with the data collecting instrument of outside with charge amplifier by Signal transfer box with acceleration transducer.
CN2010101543327A 2010-04-24 2010-04-24 Device for testing transverse impact rigidity and damping characteristic of pipe joint for naval vessel Expired - Fee Related CN101839797B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2010101543327A CN101839797B (en) 2010-04-24 2010-04-24 Device for testing transverse impact rigidity and damping characteristic of pipe joint for naval vessel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2010101543327A CN101839797B (en) 2010-04-24 2010-04-24 Device for testing transverse impact rigidity and damping characteristic of pipe joint for naval vessel

Publications (2)

Publication Number Publication Date
CN101839797A CN101839797A (en) 2010-09-22
CN101839797B true CN101839797B (en) 2011-08-31

Family

ID=42743307

Family Applications (1)

Application Number Title Priority Date Filing Date
CN2010101543327A Expired - Fee Related CN101839797B (en) 2010-04-24 2010-04-24 Device for testing transverse impact rigidity and damping characteristic of pipe joint for naval vessel

Country Status (1)

Country Link
CN (1) CN101839797B (en)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102175413B (en) * 2011-01-21 2013-06-05 西南交通大学 Device for testing transverse impact of railroad switch
CN102901597B (en) * 2011-07-26 2015-02-11 常州市瑞泰工程机械有限公司 Device for measuring lateral resistance of track bed
CN102507742B (en) * 2011-11-18 2014-05-07 西安向阳航天材料股份有限公司 Method for evaluating bonding strength of mechanical composite tube
DK2746635T3 (en) 2012-12-18 2016-04-04 Ge Oil & Gas Uk Ltd Testing the integrity of the tube
CN106323572B (en) * 2015-06-19 2018-11-09 北京物资学院 A kind of cyclic annular damping part dynamic characteristic test vibration platform apparatus
CN105092193A (en) * 2015-07-21 2015-11-25 南京林业大学 Method for testing hardness of racket shaft
CN105115690B (en) * 2015-08-18 2017-10-31 上海交通大学 A kind of multidirectional impedance matrix of vibration isolator and rigidity test experimental rig and test method
CN107894316B (en) * 2017-11-10 2019-11-05 重庆大学 New Wind Tunnel experimental rig is pressed in gas bullet-survey with pacing inertia force
CN109470435A (en) * 2018-11-09 2019-03-15 中国直升机设计研究所 Wheel stiffness and damping testing stand
CN109632224B (en) * 2018-12-07 2021-02-09 武昌船舶重工集团有限公司 Ship base damping rate measuring method
CN110426343B (en) * 2019-09-18 2021-08-27 中国空气动力研究与发展中心低速空气动力研究所 Material damping coefficient measuring method and device based on vibration table
WO2021070270A1 (en) * 2019-10-08 2021-04-15 日本電信電話株式会社 Vibration reproduction device
CN116990135B (en) * 2023-09-26 2023-12-12 衡水威格橡塑金属制品有限公司 Transverse rigidity testing device for metal hose

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1553393A1 (en) * 2003-12-31 2005-07-13 Airbus Espana, S.L. Machine for applying low velocity impacts to mechanical structures
CN1865887A (en) * 2006-03-20 2006-11-22 河南科技大学 Testing device for dynamic performance of corrugated pipe and testing method therefor
CN2896283Y (en) * 2006-05-18 2007-05-02 南京卓成自动化设备有限公司 Integrated gas on-line detector

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10170483A (en) * 1996-12-04 1998-06-26 Nippon Treks Kk Device for discriminating kind of oil by using ultrasonic wave
JP2004184320A (en) * 2002-12-05 2004-07-02 Ishikawajima Harima Heavy Ind Co Ltd Gas detector for testing piping flange connection

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1553393A1 (en) * 2003-12-31 2005-07-13 Airbus Espana, S.L. Machine for applying low velocity impacts to mechanical structures
CN1865887A (en) * 2006-03-20 2006-11-22 河南科技大学 Testing device for dynamic performance of corrugated pipe and testing method therefor
CN2896283Y (en) * 2006-05-18 2007-05-02 南京卓成自动化设备有限公司 Integrated gas on-line detector

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
JP特开2004-184320A 2004.07.02
JP特开平10-170483A 1998.06.26

Also Published As

Publication number Publication date
CN101839797A (en) 2010-09-22

Similar Documents

Publication Publication Date Title
CN101839797B (en) Device for testing transverse impact rigidity and damping characteristic of pipe joint for naval vessel
Asgarian et al. Damage detection of jacket type offshore platforms using rate of signal energy using wavelet packet transform
CN103389247B (en) Testing system for simulating hydraulic fracture of concrete members under high water pressure
CN102928213B (en) Wharf structure anti-fatigue test system and test method
Brosset et al. Overview of Sloshel project
CN100578178C (en) Testing device for dynamic performance of corrugated pipe and testing method therefor
CN102175406B (en) Test system and test method for water tightness test of tunnel deformation joint waterstop
Tagart Jr et al. Piping dynamic reliability and code rule change recommendations
Doyle Force identification from dynamic responses of a bimaterial beam
Popescu et al. Pipe-soil interaction: large scale tests and numerical modelling
CN104614020B (en) The original position whole detection method of long piled wharf horizontal bearing capacity and force model proterties
CN104990671A (en) Device for researching sealing performance of flanges in vibration environment
WO2021088238A1 (en) Shpb test system-based dynamic lateral strain measurement device and method for test piece
CN102865952A (en) Nondestructive testing method for working stress of concrete
Metzger et al. Measurement of marine vessel berthing parameters
CN203908754U (en) Component for simulating flexible joint of immersed tunnel
Wang et al. Experimental and numerical investigations on the T joint of jack-up platform laterally punched by a knife edge indenter
CN1333265C (en) Back-cupping method and device for sound emission source signal in sound emission detection technology
CN104897860A (en) Novel expanding connection technology and assessment method
CN107609279A (en) A kind of T-shaped welding point impact strength design criteria acquisition methods
CN116773379A (en) Axial load and transverse reciprocating action coupling test device for pressurizing pipeline
CN102213646B (en) Experimental device and experimental method for power substructure of bracket pipe frame of pipe-laying ship
Diebold Methodology for LNG terminals
CN103743558A (en) Member for simulating flexible joint of immersed tube tunnel
Pinheiro et al. Stress concentration factors of dented pipelines

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C14 Grant of patent or utility model
GR01 Patent grant
C17 Cessation of patent right
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20110831

Termination date: 20140424