Polytec-激光测振仪在模态分析领域的最新应用-课件.pptx

1、Polytec China Polytec 激光测振仪激光测振仪在在振动和应变振动和应变领域领域的最新应用的最新应用 1.Polytec 公司介绍公司介绍2.Polytec 新产品的介绍新产品的介绍3.Polytec 在振动和应力应变领域最新在振动和应力应变领域最新的应用案例的应用案例4.测试产品应用发展趋势测试产品应用发展趋势1.Polytec 公司介绍公司介绍History:Foundation in 1967 Polytec=first company selling LASER in Germany and EuropeAbout 30 years ago first Laser Do

2、ppler Vibrometer(LDV)During last 30 years continuous improvement of LDV now 3D SLDV with RobotToday:Market leader in field of non contact vibration measurements320 employees strong development team(65 employees)Development+manufacturing all in Waldbronn offices and sales in whole worldHeNe Laser3D S

3、canning LDV2014年陈志坚博士因照顾家年陈志坚博士因照顾家庭，计划返回加拿大。庭，计划返回加拿大。Polytec China 2014年年5月月正式成立正式成立太平洋光电的代理业务将转给太平洋光电的代理业务将转给Polytec China 1.Polytec 公司介绍公司介绍2.Polytec 新产品介绍新产品介绍Single point to scanning1D to 3Dnmpm,fm1Hz 10kHz0Hz 1,2 GHzresolutionbandwidthUp to 10mUp to 500mdistance2.Polytec 新产品介绍新产品介绍-Polytec“al

4、ways state of the art”our new products-PSV-500-3D in combination with KUKA robot-The new patented MSA-100-3D-The new UHF-120-The new RSV-150 with infrared LASER sourceMSA-100-3D for 3D vibration analysis2.Polytec 新产品介绍新产品介绍UHF-1202.Polytec 新产品介绍新产品介绍光学头采用顶尖的光学技术，激光点直径小于1m（安装100倍物镜），是微型物体和具有短声波特点的超高频

5、物体的振动测量的最佳选择。Polytec的Vibsoft软件具有强大的分析及后处理功能，可显示频谱信号、速度或位移的瞬态时域信号，最高频率可达1200MHz。9RSV-150 Short Range(0,8 4,5m)and Long Range(5m 500m)Version available new infrared laser(1550 nm Erbium fiber laser)new laser with lots of advantages 20 better optical sensitivity(10mW output power+2 x more photons)Stabi

6、lized laser DC displacement measurements without drift possible Extreme long coherence length(measurements up to 1000m tested)B(1 m/s and 25kHz)and M(24,5 m/s and 2 MHz)Version eye save water in eye absorbs 1550nm class 2 for both laser 2.Polytec 新产品介绍新产品介绍3.Polytec 在模态分析行业最新的应用案例在模态分析行业最新的应用案例Versi

7、on 06/10101）极端温度航空航天极端温度航空航天GVT测试测试（多点热模态）（多点热模态）a)OFV-5000+OFV-505/OFV-534/OFV-552 Sensor HeadControllerKey FeaturesModular ApproachApplication specific configurationBest resolution Upgradeable to Scanning VibrometerFrequencies up to few MHzDifferent decoder cards Vibrometer Systemb)极端温度测试问题和需要极端温度

8、测试问题和需要1.For Aerospace,we need structure test in very high and low temperature now.2.Use tranditional method,it is very diffictult to do modal survey test in extreme conditon.c)Polytec 解决方案和具体案例解决方案和具体案例Version 06/1012Requirement in aerospace:1)Hot or cold temperature modal test2)Long distance,non-c

9、ontact3)Simultaneous measurement（16,17 muti-points)2)PSV-500-3D 与与 Kuka机器人结合完成模态测试及试验和有机器人结合完成模态测试及试验和有限元（限元（FEM)的相关性分析的相关性分析 Version 06/10133.Polytec 在模态分析行业最新的应用案例在模态分析行业最新的应用案例Setup in Test Field Mercedes Benz StuttgartSet-up with 1 shaker and accelerometers for hidden pointscabling for hidden po

10、ints7/25/202214FEM Validation of carSetup in Test Field Mercedes Benz Stuttgart7/25/202215FEM Validation of carSetup in Test Field Mercedes Benz Stuttgart7/25/202216FEM Validation of carWorking Distance 2mPossible sections with 2m distance to the vehicle:5 measurements needed for one side of the car

11、7/25/202217Experimental Modal AnalysisMode Shapesstitched from segments,same excitationincreasing frequency7/25/202218Experimental Modal Analysis19 Version 2013Validation of FE ModalSummary How to validate FE simulationFE SimulationExp.Modal AnalysisMode ShapeMode Shape adapting curve fitting to che

12、ckCorrect modal parametervalidationGrid importScanExport3)PSV-500 40m 长风力发电机叶片测试长风力发电机叶片测试Large structure20FEM validation also of big parts possible with PSV4)航空发动机模态与应力应变同步测试航空发动机模态与应力应变同步测试1.BLISK(blade integrated disk)from Rolls Royce MTOC+TU Cottbus to reduce“fuel”consumption by means of reducin

13、g weight of turbine2.Problem:Mistuning due to inaccuracy of manufacturing process=blade have different resonances +low damping(just material damping)high vibration amplitudes(up to 2x compared to ideal design)huge strain huge stress shorter livetimeVersion 2013What is strain?mmLlongitudinal strain:L

14、LsxPSV-500-3D Stress an Strain-dynamicAdvantages compared to strain gauge:1.No mass loading2.High spatial resolution(point distance below 1mm)3.Full field stress&strain distribution4.High resolutionPSV-3D Strain:Results7/25/2022#247000 nm 350 nmD=35 nm (Grid:3 mm)D=6 nm (Grid:2 mm)xx yy3Din-plane2 S

15、tress&Strain calculation by strain processorStrain Measurements FEM7/25/202225Stress ZXStress ZStress XFatigue testing of blades1.High Amplitudes excited2.With e.g.HSV-100 or OFV-5000 we measure vibration of turbine blade3.Before blade brakes the amplitude and resonance frequencies are changing4.Als

16、o performed in climatic chamberVersion 06/1027Optimization mistuning(different resonances for different modes)5)Squealing brakes-automotiveVersion 06/1028Problem:squealing brakesAim:get rid of brake squealingHow?Measure Vibrations during squealing in Dynamometer visualize vibration validate existing

17、 FE model improve design of brake system test again Porsche Brake SystemsHow do other customer use the LDV?1.AutomotiveVersion 06/1029Theory avoid“mode coupling”(energy from in plane mode coupled to oop mode which makes noise)Separate modes!How do other customer use the LDV?1.AutomotiveVersion 06/10

18、30More and more electronic parts in cars e.g.air bag sensorProblem:vibration in car can damage electronics e.g.condenser falls apart from boardAim:Shaker tests+SLDV vibration measurements to understand:Why does chip or condenser falls apart from boardHow do other customer use the LDV?1.Automotive7/2

19、5/2022#31219 m span1900 t stealWhy is it useful to measure the dynamic properties of a bridge?The behaviour of Eigenfrequencies over time can be used to determine the aging of the bridge Knowing the initial state is key Factors like Temperature and load also influence the dynamic properties 6)Bridge

20、 measurement Grevenmacher7/25/2022#32DraufsichtScan RSV“Reference RSVSet upBridge measurement Grevenmacher7/25/2022#33Reference RSVScan RSV“Set upBridge measurement Grevenmacher7/25/2022#34DraufsichtThe bridge was loaded with 6 trucks(32t each)in the middle(The crossing of the first 3 trucks was not

21、 measured)Measurement trucks crossing Bridge measurement Grevenmacher7/25/2022#35Measurement trucks crossing Bridge measurement Grevenmacher1212Manitu“small craneManituMeasuring positionTruck(32t)Scan Grid Index#5 Reference2dn RSV-150Modal Testing with RSV 1/14/2013#36Keep in mind!:Good results need Precision&PatienceSakitama Bridge Distance up to 195mExcitation:ambient wind&traffic7/25/2022#37Remote Sensing Vibrometer RSV-1504.测试产品应用发展趋势测试产品应用发展趋势1）适应各种极端测试条件）适应各种极端测试条件2）试验和仿真相结合）试验和仿真相结合3）高效自动化）高效自动化 扫描非接触式扫描非接触式 与机器人结合，全自动与机器人结合，全自动 这正是这正是Polytec努力的方向努力的方向！