WO2012037945A1 - Système d'essai et procédé d'essai - Google Patents

Système d'essai et procédé d'essai Download PDF

Info

Publication number
WO2012037945A1
WO2012037945A1 PCT/DK2011/050357 DK2011050357W WO2012037945A1 WO 2012037945 A1 WO2012037945 A1 WO 2012037945A1 DK 2011050357 W DK2011050357 W DK 2011050357W WO 2012037945 A1 WO2012037945 A1 WO 2012037945A1
Authority
WO
WIPO (PCT)
Prior art keywords
test
test system
carriages
load
reciprocating
Prior art date
Application number
PCT/DK2011/050357
Other languages
English (en)
Inventor
Alfred Rasmussen
Original Assignee
Alvibra A/S
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 Alvibra A/S filed Critical Alvibra A/S
Publication of WO2012037945A1 publication Critical patent/WO2012037945A1/fr

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M7/00—Vibration-testing of structures; Shock-testing of structures
    • G01M7/02—Vibration-testing by means of a shake table

Definitions

  • the present invention relates to a test system comprising at least a first and a second reciprocating movable load carriage, which first and second reciprocating load carriages are connected by spring means.
  • the present invention further relates to a method for test of heavy loads at a test system, which test system comprises reciprocating movable carriages interconnected by spring means, which reciprocating carriages are connected to a force generating apparatus.
  • the present invention further relates to the use of the test system and the method for test.
  • WO04005879A1 concerns an apparatus for applying at least one load to a specimen according to one embodiment of the invention may comprise a mass.
  • An actuator mounted to the specimen and operatively associated with the mass moves the mass along a linear displacement path that is perpendicular to a longitudinal axis of the specimen.
  • a control system operatively associated with the actuator operates the actuator to reciprocate the mass along the linear displacement path at a reciprocating frequency, the reciprocating frequency being about equal to a resonance frequency of the specimen in a test configuration.
  • EP 1349676 concerns a drive unit comprising a at least one motor, which motor is connected to at least one first spring, which first spring is connected to at least one movable mass, which movable mass is connected to at least one second spring.
  • the object of the invention is to perform a vibration test at heavy components.
  • the reciprocating moveable load carriages are supported at a support platform
  • the said spring means comprises a plurality of springs, which plurality of springs are supported by at least one support unit.
  • the frequency as such could be in the area from 1-10 hertz and the amplitude could be from 20-200 millimetres. In that way it should be possible for different loads to achieve an acceleration in the area from 2-15 G. It will be possible by this invention to test loads with a weight as high as 2 tons on each of the reciprocating movable load carriages. Even heavier loads could be tested. If a test system is constructed in a larger size, extremely heavy loads could be tested. For many heavy constructions there is always a need for a test, before the constructions are delivered to a customer. Often only calculation of vibration stability is achieved, because testing is impossible. Especially for heavy wind mill components, it is important that a vibration test can be performed so that vibrations that occur in a nacelle can be simulated. Since the oscillations will be achieved in a mechanical oscillating system, only a limited energy supply is necessary for keeping the oscillations for a longer time period. The energy supply depends on frictional force between the movable load carriages and the support.
  • the support unit can be operable to support a mostly non-moving point of said spring means. Since the spring means are relatively long, they have a length of maybe 3 meters or more, these springs need one or more supports, and knowing the oscillation frequency and the way these oscillations take place during the springs, there will probably be achieved a note just in the middle of the spring where the spring is non-moving, because the moving carriages are moving opposite each other. Exactly at the note where the spring is in rest, it is easy to place a support unit at the spring. This support unit can then rest on the support for the movable carriages. It is possible that the oscillation frequency is selected so that more notes exist at the spring means and therefore more support units could be placed below the springs. Especially if even longer or bigger operators for oscillations are constructed, there will be a need for further support units.
  • the support unit can be operable to support at least one moving point of said spring means, said support unit is moveable relative to the support platform. If a situation occurs where for example there is some weight difference be- tween the loads, the point of non-moving of the spring will probably be changed or maybe even not exist, therefore it can be important that the support unit is movable relative to the support platform. Even at a start up it can be necessary that the support unit is moving maybe only a few millimetres, but if an oscillation occurs with a difference in the loads, there will be introduced a movement of the middle point of the spring. Therefore it is important that the support unit is movable.
  • the spring means can comprise a two-dimensional array of springs.
  • a spring of the dimension that should be used will be extremely expensive and would probably have to be produced once per unit which is to be built. Therefore, it is much more effective to couple a number of springs in parallel. Because of the high number of springs, a two-dimensional array will be highly effective. It is to be understood that the array of springs may by constructed so that the whole array could be replaced. In that way a new array with another combination of springs could easily be placed when a new test has to be performed.
  • the two-dimensional array of springs can comprise an upper row and a lower row of springs, and wherein said support unit is adapted to support said upper row and said lower row of springs.
  • the support unit has to support each row of springs, and in some situations even more than an upper or lower row of springs could be used, so that there could be three, four or five layers of springs. Even with a high number of layers of springs it is necessary to support all of the springs, because the springs are relatively heavy and very long.
  • the support platform can carry the reciprocating movable load carriages, which recip- rocating moveable load carriages carry a first and a second load under test.
  • Each of the reciprocating moveable carriages carries a load of mostly the same weight. Different items can be tested together if they have more or less the same mass. If not, balanced dummy masses could be added to the carriages. But if a number of items have to be tested, it will often be possible to test two equal items at the same time. If heavy constructions are to be tested, it is supposed that there can be a slightly small difference in their weight. If the support unit is able to move only a few millimetres, tests could be performed with small changes in mass. It should be possible to place load sensors because of the relatively long movement of the reciprocating movable carriages.
  • the reciprocating moveable carriages can be cooperating with a linear guide system. These carriages have to be controlled by a linear guide system.
  • the linear guide system can be formed in a lot of different ways, but one possibility is that the movable carriages are placed on wheels, and these wheels are rotating at rails for giving the best support for the heavy load. Two or more rails can function as the support platform and carry the reciprocating movable load carriages. Hereby the friction between the reciprocating movable carriages and the support can be rather small. That would lead to relatively low energy consumption when the oscillating system is in operation.
  • the test system comprises at least one first force generating apparatus, at least one activation spring connected to the force generating apparatus, and at least one of the reciprocating movable load carriages is connected to the activation spring.
  • a possible activation could be performed from an electric motor which by an eccentric and a spring is connected to one of the reciprocating movable load carriages.
  • the test system can comprise at least one linear hydraulic activator connected to at least one of the reciprocating movable load carriages for driving the test system. It is possible that the reciprocating movable load carriages are connected to hydraulic cylin- ders which can be activated by a hydraulic pressure, so that the heavy loads are being moved. Because of the relative low frequency, it is possible by hydraulic valves to activate and deactivate cylinders so that an oscillation can be started. It is possible with oscillating systems driven by hydraulic cylinders also to control the frequency. Hydraulic cylinders can be operating positive and negative in a puss/pull mode. In that way a relative fast acceleration of the oscillating system can be performed.
  • the object can be achieved if the system described in the preamble to the claim is further modified so that a heavy load is fixated to each of the reciprocating carriages, the spring means is adjusted in accordance with the load and test frequency, the force gen- erating apparatus is started, and the reciprocating movable carriages an the load starts to reciprocate with a selected frequency.
  • the system or method can be used for test of heavy loads. It is possible by the test system to use the system for heavy loads. If particularly heavy loads have to be tested, a test rig could be manufactured just for that purpose.
  • the system or method can be used for test of windmill components. Different wind mill components could be tested in that way. For example all components which have to be placed in a nacelle, such as gearbox and generators can be tested by an oscillation test.
  • the system or method can be used for test of cars or car components. It should be pos- sible in a test system like this to test a normal car for vibrations.
  • the system or method can be used for test of off shore components. Heavy off-shore components can be tested, before they are sent to platforms at open sea.
  • the system or method can be used for test of airplane or space components. Many airplane or space components have to be tested, before the components can be used in the airplane or space industry.
  • the system or method can be used for test of ship components. Also many heavy ship components can be tested by a system as described.
  • Fig. 1 shows a side view of a possible embodiment for a test system.
  • Fig. 2 shows a top view of the test system.
  • Fig 3 shows a sectional top view of the test system.
  • Fig. 4 shows a first possible embodiment for reciprocating load carriages.
  • Fig. 5 shows an alternative embodiment of the reciprocating load carriages.
  • Fig. 1 shows a test system 2 which is one possible embodiment of the invention described in the pending application.
  • the test system 2 comprises a fixture 4 and a number of rails 6 on which rails 6 reciprocating load carriages 8 and 10 are indicated.
  • Spring means 12 are supported by a support unit 14, and the spring means 12 are placed between the frames 15 which frames 15 are part of the reciprocating load carriages 8 and 10.
  • the reciprocating load carriages are supported by the wheels 16 at the rails 6.
  • the support unit 14 is supported by a movable support 18 which also interacts with the rails 6.
  • Fig. 2 shows the same embodiment as does fig. 1 , but seen from the upside.
  • the test unit 2 is indicated with a frame 4, and the frame 4 comprises rails 6.
  • the rails support the reciprocating load carriages 8 and 10, and spring means 12 are carried by the carriage unit 14 and the spring means 12 are placed between the frames 15 which frames are part of the reciprocating load carriages 8 and 10.
  • Fig. 3 shows a sectional view of the test system 2.
  • the system shown in fig. 3 has the same features as those shown in fig. 2, and these common features will not be further described here. Instead there is a sectional view indicating a mechanical actuator 20 which can interconnect some of the springs that form the spring means 12.
  • the spring constant as such can be adjusted by simply coupling some of the springs into a non-active state during oscillation. Thereby different oscillating frequencies can be adjusted before a test is started.
  • the spring constant as such depends on the mass that is to be tested and the selected frequency. Therefore it is highly effective that the spring constant can be adjusted in one or another way.
  • Fig. 4 shows the reciprocating load carriages 8 and a wheel unit 16 which are supported by a rail 6.
  • Fig. 5 shows an alternative embodiment where the reciprocating load carriages 8 or 10 are also supported by wheel means 16, but where the wheel 22 together with the support 24 forms a guidance system.
  • Test systems could be constructed in such a way that very heavy loads of up to 50 tonnes can be tested.
  • the test system 2 must only be made in some sufficiently larger dimensions.
  • the test system 2 is operating at the surface, for example inside a relatively big building.
  • a vertical system could be built where one of the reciprocating load carriages form part of a floor where for example a car can be parked when it is to be tested.
  • the spring means and other load carriages could be placed deep below the floor surface, and the downwards load carriage could in fact carry a dummy mass which is more or less like the mass of the car that is to be tested.
  • Another testing example is fixing a windmill wing at both of the load carriages 8 and 10 and then starts an operation test of two wings at the same time.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)

Abstract

La présente invention concerne un procédé d'essai et un système d'essai (2) ainsi que l'utilisation du système (2), lequel comprend un premier et un second transporteur de charge à mouvement alternatif (8, 10) reliés par des moyens à ressort (12). L'objet de l'invention est de réaliser un essai de vibration au niveau de composants lourds. Ceci est réalisable si les transporteurs de charge à mouvement alternatif (8, 10) sont supportés sur une plateforme de support (14), et si les moyens à ressort (12) comprennent une pluralité de ressorts, lesquels sont supportés par au moins une unité de support (14). Ainsi, un essai peut être réalisé même avec une charge très lourde qui peut être placée sur l'un des transporteurs de charge à mouvement alternatif (8, 10). Le système (2) peut fonctionner de manière optimale si l'essai se fait simultanément pour deux masses égales. La fréquence en ce cas peut se situer dans la plage allant de 1 à 10 hertz et l'amplitude peut se situer entre 20 et 200 millimètres. De cette manière, il peut être possible de réaliser pour différentes charges une accélération se situant dans la plage allant de 2 à 15 G.
PCT/DK2011/050357 2010-09-22 2011-09-22 Système d'essai et procédé d'essai WO2012037945A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DKPA201070403 2010-09-22
DKPA201070403 2010-09-22

Publications (1)

Publication Number Publication Date
WO2012037945A1 true WO2012037945A1 (fr) 2012-03-29

Family

ID=45873459

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DK2011/050357 WO2012037945A1 (fr) 2010-09-22 2011-09-22 Système d'essai et procédé d'essai

Country Status (1)

Country Link
WO (1) WO2012037945A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102853981A (zh) * 2012-09-28 2013-01-02 中国科学院力学研究所 一种可模拟大幅值振动系统的实验装置
CN105115690A (zh) * 2015-08-18 2015-12-02 上海交通大学 一种隔振器多向阻抗矩阵及刚度测试试验装置和试验方法
CN110987343A (zh) * 2019-12-06 2020-04-10 中国航空综合技术研究所 一种飞机面板连接件振动试验装置及试验方法
CN116046346A (zh) * 2023-02-15 2023-05-02 中国航天三江集团有限公司 寻找弹性中心的测量方法

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1349676B1 (fr) * 2000-12-11 2006-03-01 AB Vibrator ApS Unite motrice produisant un mouvement alternatif d'entrainement d'elements mobiles de machines

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1349676B1 (fr) * 2000-12-11 2006-03-01 AB Vibrator ApS Unite motrice produisant un mouvement alternatif d'entrainement d'elements mobiles de machines

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102853981A (zh) * 2012-09-28 2013-01-02 中国科学院力学研究所 一种可模拟大幅值振动系统的实验装置
CN102853981B (zh) * 2012-09-28 2015-04-29 中国科学院力学研究所 一种可模拟大幅值振动系统的实验装置
CN105115690A (zh) * 2015-08-18 2015-12-02 上海交通大学 一种隔振器多向阻抗矩阵及刚度测试试验装置和试验方法
CN105115690B (zh) * 2015-08-18 2017-10-31 上海交通大学 一种隔振器多向阻抗矩阵及刚度测试试验装置和试验方法
CN110987343A (zh) * 2019-12-06 2020-04-10 中国航空综合技术研究所 一种飞机面板连接件振动试验装置及试验方法
CN110987343B (zh) * 2019-12-06 2021-08-27 中国航空综合技术研究所 一种飞机面板连接件振动试验装置及试验方法
CN116046346A (zh) * 2023-02-15 2023-05-02 中国航天三江集团有限公司 寻找弹性中心的测量方法
CN116046346B (zh) * 2023-02-15 2023-10-10 中国航天三江集团有限公司 寻找弹性中心的测量方法

Similar Documents

Publication Publication Date Title
JP6746175B2 (ja) 動力シミュレータ及び試験装置
US11199475B2 (en) Collision simulation test apparatus and impact test apparatus
US9651112B2 (en) Vibration suppression method, controller, device of boom and pump truck
EP2930491A1 (fr) Dispositif d'essai
EP2269023B1 (fr) Appareil et procédé de chargement d'échantillon
KR20190123762A (ko) 충돌 모의 시험 장치 및 충격 시험 장치
WO2012037945A1 (fr) Système d'essai et procédé d'essai
CN102156031B (zh) 起重机金属结构动态试验检测平台
CN103604578A (zh) 基于气动式大型高量级水平冲击试验台
CN106840559A (zh) 一种可调式单层及双层隔振系统振动试验台及试验方法
CN102252815A (zh) 一种磁浮列车单边车轨耦合振动试验台装置
JP2012159476A (ja) 振動試験装置
CN102865983A (zh) 一种负载可调的电力紧固件防松性能评估检测装置
CN107664601B (zh) 一种可变加载幅频的耦合振动拉伸试验装置及其控制方法
CN106197974A (zh) 一种模拟实车工作状态的空气弹簧疲劳试验机
CN103792060B (zh) 双向振动抗震试验台
CN205879504U (zh) 一种模拟实车工作状态的空气弹簧疲劳试验机
CN106872159B (zh) 一种风力发电机偏航制动系统振动噪声试验台
JP2016090531A (ja) 加力試験装置
CN106872164B (zh) 一种汽车飞轮疲劳破坏测试试验台
JP5813346B2 (ja) 加振装置および加振方法
CN215492331U (zh) 主动激振式桥梁缆索检测装置
CN112697372B (zh) 一种基于位移曲线的力控制三自由度运动模拟装置
JP2015215290A (ja) 振動試験装置
JP2001296223A (ja) コネクティングロッド取付位置可変化装置

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 11826434

Country of ref document: EP

Kind code of ref document: A1

122 Ep: pct application non-entry in european phase

Ref document number: 11826434

Country of ref document: EP

Kind code of ref document: A1