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I<\/strong>f you would like to test the vibration behavior of an object that is not vibrating by its own, you have to excite it externally. For modal tests both an electromagnetic shaker and a modal hammer are common broadband excitation tools that has been widely used for many years. ...<\/p>","imageObject":{"variants":[{"src":"https:\/\/magazine.polytec.com\/fileadmin\/_processed_\/f\/c\/csm_inertial-shakers-for-modal-testing_d59a964c99.jpg.webp","type":"image\/webp","name":"default","width":"570","breakpoint":"1200"},{"src":"https:\/\/magazine.polytec.com\/fileadmin\/_processed_\/f\/c\/csm_inertial-shakers-for-modal-testing_d59a964c99.jpg","name":"default","width":"570","breakpoint":"1200"},{"src":"https:\/\/magazine.polytec.com\/fileadmin\/_processed_\/f\/c\/csm_inertial-shakers-for-modal-testing_2db32f24a4.jpg.webp","type":"image\/webp","name":"large","width":"900","breakpoint":"992"},{"src":"https:\/\/magazine.polytec.com\/fileadmin\/_processed_\/f\/c\/csm_inertial-shakers-for-modal-testing_2db32f24a4.jpg","name":"large","width":"900","breakpoint":"992"},{"src":"https:\/\/magazine.polytec.com\/fileadmin\/_processed_\/f\/c\/csm_inertial-shakers-for-modal-testing_5ef1338472.jpg.webp","type":"image\/webp","name":"medium","width":"1380","breakpoint":"768"},{"src":"https:\/\/magazine.polytec.com\/fileadmin\/_processed_\/f\/c\/csm_inertial-shakers-for-modal-testing_5ef1338472.jpg","name":"medium","width":"1380","breakpoint":"768"},{"src":"https:\/\/magazine.polytec.com\/fileadmin\/_processed_\/f\/c\/csm_inertial-shakers-for-modal-testing_35c682413f.jpg.webp","type":"image\/webp","name":"extrasmall","width":"640","breakpoint":"320"},{"src":"https:\/\/magazine.polytec.com\/fileadmin\/_processed_\/f\/c\/csm_inertial-shakers-for-modal-testing_35c682413f.jpg","name":"extrasmall","width":"640","breakpoint":"320"}],"default":{"src":"https:\/\/magazine.polytec.com\/fileadmin\/_processed_\/f\/c\/csm_inertial-shakers-for-modal-testing_d59a964c99.jpg","alt":"","title":""}},"link":"https:\/\/magazine.polytec.com\/fr\/inertial-shakers-for-modal-testing","origUid":7604,"readingTime":"6 min","subline":"Exciting comparison","tags":[{"title":"Acoustics & ultrasonics","uid":2},{"title":"Automotive & aerospace","uid":3},{"title":"Electronics, semicon, solar","uid":5},{"title":"General R&D","uid":6}],"technologies":[{"title":"Vibrometry","uid":214}],"title":"Inertial shakers for modal testing","uid":7610,"visits":93},{"authors":[],"datetime":null,"description":"

In the realm of vibration testing, a significant obstacle arises in the form of mass loading. The behavior of a dynamic vibration sample, or device under test (DUT), is profoundly influenced by the additional mass applied to it. This phenomenon is particularly pronounced in vibrating cantilevered beams, and it becomes even more intricate when dealing with curved cantilevered beams like turbine blades. ...<\/p>","imageObject":{"variants":[{"src":"https:\/\/magazine.polytec.com\/fileadmin\/_processed_\/d\/2\/csm_mass-loading-turbines_a28d48bb7b.jpg.webp","type":"image\/webp","name":"default","width":"570","breakpoint":"1200"},{"src":"https:\/\/magazine.polytec.com\/fileadmin\/_processed_\/d\/2\/csm_mass-loading-turbines_a28d48bb7b.jpg","name":"default","width":"570","breakpoint":"1200"},{"src":"https:\/\/magazine.polytec.com\/fileadmin\/_processed_\/d\/2\/csm_mass-loading-turbines_f7b274423b.jpg.webp","type":"image\/webp","name":"large","width":"900","breakpoint":"992"},{"src":"https:\/\/magazine.polytec.com\/fileadmin\/_processed_\/d\/2\/csm_mass-loading-turbines_f7b274423b.jpg","name":"large","width":"900","breakpoint":"992"},{"src":"https:\/\/magazine.polytec.com\/fileadmin\/_processed_\/d\/2\/csm_mass-loading-turbines_86a282810b.jpg.webp","type":"image\/webp","name":"medium","width":"1380","breakpoint":"768"},{"src":"https:\/\/magazine.polytec.com\/fileadmin\/_processed_\/d\/2\/csm_mass-loading-turbines_86a282810b.jpg","name":"medium","width":"1380","breakpoint":"768"},{"src":"https:\/\/magazine.polytec.com\/fileadmin\/_processed_\/d\/2\/csm_mass-loading-turbines_2b680fdf6a.jpg.webp","type":"image\/webp","name":"extrasmall","width":"640","breakpoint":"320"},{"src":"https:\/\/magazine.polytec.com\/fileadmin\/_processed_\/d\/2\/csm_mass-loading-turbines_2b680fdf6a.jpg","name":"extrasmall","width":"640","breakpoint":"320"}],"default":{"src":"https:\/\/magazine.polytec.com\/fileadmin\/_processed_\/d\/2\/csm_mass-loading-turbines_a28d48bb7b.jpg","alt":"","title":""}},"link":"https:\/\/magazine.polytec.com\/fr\/effects-of-mass-loading","origUid":7487,"readingTime":"5 min","subline":"Effects of mass loading","tags":[{"title":"General R&D","uid":6},{"title":"Automotive & aerospace","uid":3},{"title":"Civil & structural engineering","uid":7},{"title":"Materials research & NDT","uid":9}],"technologies":[{"title":"Vibrometry","uid":214}],"title":"When to choose a laser Doppler vibrometer for vibration measurement","uid":7493,"visits":112},{"authors":[],"datetime":null,"description":"

Piezoelectric disk resonators are designed to transduce specific contour mode bulk acoustic wave (BAW) resonant shapes. Utilizing a unique property of lead magnesium niobite-lead titanate (PMN-PT) thin films, microfabricated disk resonators are characterized using laser Doppler vibrometry. PMN-PT is a ferroelectric material that is known for its piezoelectric and electrostrictive properties.<\/p>","imageObject":{"variants":[{"src":"https:\/\/magazine.polytec.com\/fileadmin\/_processed_\/0\/9\/csm_piezo-materials-and-wine-glasses_03c6c43f53.jpg.webp","type":"image\/webp","name":"default","width":"570","breakpoint":"1200"},{"src":"https:\/\/magazine.polytec.com\/fileadmin\/_processed_\/0\/9\/csm_piezo-materials-and-wine-glasses_03c6c43f53.jpg","name":"default","width":"570","breakpoint":"1200"},{"src":"https:\/\/magazine.polytec.com\/fileadmin\/_processed_\/0\/9\/csm_piezo-materials-and-wine-glasses_28f7b9110b.jpg.webp","type":"image\/webp","name":"large","width":"900","breakpoint":"992"},{"src":"https:\/\/magazine.polytec.com\/fileadmin\/_processed_\/0\/9\/csm_piezo-materials-and-wine-glasses_28f7b9110b.jpg","name":"large","width":"900","breakpoint":"992"},{"src":"https:\/\/magazine.polytec.com\/fileadmin\/_processed_\/0\/9\/csm_piezo-materials-and-wine-glasses_d692e8cb5f.jpg.webp","type":"image\/webp","name":"medium","width":"1380","breakpoint":"768"},{"src":"https:\/\/magazine.polytec.com\/fileadmin\/_processed_\/0\/9\/csm_piezo-materials-and-wine-glasses_d692e8cb5f.jpg","name":"medium","width":"1380","breakpoint":"768"},{"src":"https:\/\/magazine.polytec.com\/fileadmin\/_processed_\/0\/9\/csm_piezo-materials-and-wine-glasses_dedaa87359.jpg.webp","type":"image\/webp","name":"extrasmall","width":"640","breakpoint":"320"},{"src":"https:\/\/magazine.polytec.com\/fileadmin\/_processed_\/0\/9\/csm_piezo-materials-and-wine-glasses_dedaa87359.jpg","name":"extrasmall","width":"640","breakpoint":"320"}],"default":{"src":"https:\/\/magazine.polytec.com\/fileadmin\/_processed_\/0\/9\/csm_piezo-materials-and-wine-glasses_03c6c43f53.jpg","alt":"","title":""}},"link":"https:\/\/magazine.polytec.com\/fr\/what-you-always-wanted-to-know-about-piezo-materials-and-wine-glasses","origUid":7474,"readingTime":"4 min","subline":"What you always wanted to know about piezo materials and wine glasses","tags":[{"title":"Electronics, semicon, solar","uid":5},{"title":"General R&D","uid":6},{"title":"Materials research & NDT","uid":9},{"title":"Micro & nanotechnology","uid":10}],"technologies":[{"title":"Vibrometry","uid":214}],"title":"Single electrode transduction of contour modes in piezoelectric disk resonators","uid":7480,"visits":54},{"authors":[],"datetime":null,"description":"

We had a chance to virtually sit down for an interview with Prof. Rong Zhu Gan. In her field, she is one of those personalities that needs no introduction. For the uninitiated, she is the George Lynn Cross Research Professor, Presidential Research Professor, Charles E. Foster Chair, and Prof. of Biomedical and Mechanical Engineering, School of Aerospace & Mechanical Engineering at The University of Oklahoma and has been there for 25 years.<\/p>","imageObject":{"variants":[{"src":"https:\/\/magazine.polytec.com\/fileadmin\/_processed_\/5\/6\/csm_gan_d7f58092e7.jpg.webp","type":"image\/webp","name":"default","width":"570","breakpoint":"1200"},{"src":"https:\/\/magazine.polytec.com\/fileadmin\/_processed_\/5\/6\/csm_gan_d7f58092e7.jpg","name":"default","width":"570","breakpoint":"1200"},{"src":"https:\/\/magazine.polytec.com\/fileadmin\/magazine\/vibrometry\/image\/gan.jpg.webp","type":"image\/webp","name":"large","width":"900","breakpoint":"992"},{"src":"https:\/\/magazine.polytec.com\/fileadmin\/magazine\/vibrometry\/image\/gan.jpg","name":"large","width":"900","breakpoint":"992"},{"src":"https:\/\/magazine.polytec.com\/fileadmin\/_processed_\/5\/6\/csm_gan_f95b8e05a7.jpg.webp","type":"image\/webp","name":"medium","width":"1380","breakpoint":"768"},{"src":"https:\/\/magazine.polytec.com\/fileadmin\/_processed_\/5\/6\/csm_gan_f95b8e05a7.jpg","name":"medium","width":"1380","breakpoint":"768"},{"src":"https:\/\/magazine.polytec.com\/fileadmin\/_processed_\/5\/6\/csm_gan_9e798d193e.jpg.webp","type":"image\/webp","name":"extrasmall","width":"640","breakpoint":"320"},{"src":"https:\/\/magazine.polytec.com\/fileadmin\/_processed_\/5\/6\/csm_gan_9e798d193e.jpg","name":"extrasmall","width":"640","breakpoint":"320"}],"default":{"src":"https:\/\/magazine.polytec.com\/fileadmin\/_processed_\/5\/6\/csm_gan_d7f58092e7.jpg","alt":"Prof. Rong Zhu Gan","title":""}},"link":"https:\/\/magazine.polytec.com\/fr\/a-trend-setter-in-hearing-research","origUid":7265,"readingTime":"3 min","subline":"A trend-setter in hearing research","tags":[{"title":"Biology & medical","uid":4},{"title":"General R&D","uid":6}],"technologies":[{"title":"Vibrometry","uid":214}],"title":"Celebrating the iconic career of Professor Rong Z. Gan","uid":7273,"visits":106},{"authors":[],"datetime":null,"description":"

MAN Energy Solutions offers a comprehensive engine portfolio, propeller, and stern equipment and turbochargers for the maritime sector. Reliability is an essential aspect of our sector and especially vital on ships. During the development phase, simulation models are validated and optimized using modal tests, and examined until the components are released for series production.<\/p>\r\n\r\n","imageObject":{"variants":[{"src":"https:\/\/magazine.polytec.com\/fileadmin\/_processed_\/0\/7\/csm_turbolader-schiffsmotoren_ed0acfb6b0.jpg.webp","type":"image\/webp","name":"default","width":"570","breakpoint":"1200"},{"src":"https:\/\/magazine.polytec.com\/fileadmin\/_processed_\/0\/7\/csm_turbolader-schiffsmotoren_ed0acfb6b0.jpg","name":"default","width":"570","breakpoint":"1200"},{"src":"https:\/\/magazine.polytec.com\/fileadmin\/_processed_\/0\/7\/csm_turbolader-schiffsmotoren_5ec2c5b1dc.jpg.webp","type":"image\/webp","name":"large","width":"900","breakpoint":"992"},{"src":"https:\/\/magazine.polytec.com\/fileadmin\/_processed_\/0\/7\/csm_turbolader-schiffsmotoren_5ec2c5b1dc.jpg","name":"large","width":"900","breakpoint":"992"},{"src":"https:\/\/magazine.polytec.com\/fileadmin\/_processed_\/0\/7\/csm_turbolader-schiffsmotoren_4c389e034d.jpg.webp","type":"image\/webp","name":"medium","width":"1380","breakpoint":"768"},{"src":"https:\/\/magazine.polytec.com\/fileadmin\/_processed_\/0\/7\/csm_turbolader-schiffsmotoren_4c389e034d.jpg","name":"medium","width":"1380","breakpoint":"768"},{"src":"https:\/\/magazine.polytec.com\/fileadmin\/_processed_\/0\/7\/csm_turbolader-schiffsmotoren_58fad4b1f1.jpg.webp","type":"image\/webp","name":"extrasmall","width":"640","breakpoint":"320"},{"src":"https:\/\/magazine.polytec.com\/fileadmin\/_processed_\/0\/7\/csm_turbolader-schiffsmotoren_58fad4b1f1.jpg","name":"extrasmall","width":"640","breakpoint":"320"}],"default":{"src":"https:\/\/magazine.polytec.com\/fileadmin\/_processed_\/0\/7\/csm_turbolader-schiffsmotoren_ed0acfb6b0.jpg","alt":"","title":""}},"link":"https:\/\/magazine.polytec.com\/fr\/laser-vibrometry-in-the-development-of-turbochargers-for-ship-engines","origUid":7129,"readingTime":"5 min","subline":"Laser vibrometry in the development of turbochargers for ship engines","tags":[{"title":"General R&D","uid":6}],"technologies":[{"title":"Vibrometry","uid":214}],"title":"Boundary conditions, measurement inaccuracy, and repeatability","uid":7135,"visits":254},{"authors":[],"datetime":null,"description":"

More and more, the increasing stress on infrastructures provides the challenge of investigating and evaluating the existing structures with regard to safety and the resulting remaining useful life. Reliable, technically feasible and economical solutions for metrological monitoring are necessary in order to guarantee structural safety and fitness for purpose.<\/p>","imageObject":{"variants":[{"src":"https:\/\/magazine.polytec.com\/fileadmin\/_processed_\/e\/5\/csm_validation-of-bridge-superstructures_0fe9a7dfd3.jpg.webp","type":"image\/webp","name":"default","width":"570","breakpoint":"1200"},{"src":"https:\/\/magazine.polytec.com\/fileadmin\/_processed_\/e\/5\/csm_validation-of-bridge-superstructures_0fe9a7dfd3.jpg","name":"default","width":"570","breakpoint":"1200"},{"src":"https:\/\/magazine.polytec.com\/fileadmin\/_processed_\/e\/5\/csm_validation-of-bridge-superstructures_307755a405.jpg.webp","type":"image\/webp","name":"large","width":"900","breakpoint":"992"},{"src":"https:\/\/magazine.polytec.com\/fileadmin\/_processed_\/e\/5\/csm_validation-of-bridge-superstructures_307755a405.jpg","name":"large","width":"900","breakpoint":"992"},{"src":"https:\/\/magazine.polytec.com\/fileadmin\/_processed_\/e\/5\/csm_validation-of-bridge-superstructures_56f84b92b5.jpg.webp","type":"image\/webp","name":"medium","width":"1380","breakpoint":"768"},{"src":"https:\/\/magazine.polytec.com\/fileadmin\/_processed_\/e\/5\/csm_validation-of-bridge-superstructures_56f84b92b5.jpg","name":"medium","width":"1380","breakpoint":"768"},{"src":"https:\/\/magazine.polytec.com\/fileadmin\/_processed_\/e\/5\/csm_validation-of-bridge-superstructures_83a7a35cc2.jpg.webp","type":"image\/webp","name":"extrasmall","width":"640","breakpoint":"320"},{"src":"https:\/\/magazine.polytec.com\/fileadmin\/_processed_\/e\/5\/csm_validation-of-bridge-superstructures_83a7a35cc2.jpg","name":"extrasmall","width":"640","breakpoint":"320"}],"default":{"src":"https:\/\/magazine.polytec.com\/fileadmin\/_processed_\/e\/5\/csm_validation-of-bridge-superstructures_0fe9a7dfd3.jpg","alt":"Bridge","title":""}},"link":"https:\/\/magazine.polytec.com\/fr\/validation-on-bridge-superstructures","origUid":7053,"readingTime":"5 min","subline":"Validation on bridge superstructures","tags":[{"title":"General R&D","uid":6},{"title":"Civil & structural engineering","uid":7}],"technologies":[{"title":"Vibrometry","uid":214}],"title":"A modal-based monitoring system","uid":7060,"visits":341},{"authors":[],"datetime":null,"description":"

Osteoarthritis, a degenerative disease in the joint, is a condition that is afflicting approximately 14% of adults. Understanding the dynamics of the joint cartilage is crucial for research and for finding effective treatment methods.<\/p>","imageObject":{"variants":[{"src":"https:\/\/magazine.polytec.com\/fileadmin\/_processed_\/6\/9\/csm_osteoarthritis-therapy-using-laser-vibration-measurement_a386039211.jpg.webp","type":"image\/webp","name":"default","width":"570","breakpoint":"1200"},{"src":"https:\/\/magazine.polytec.com\/fileadmin\/_processed_\/6\/9\/csm_osteoarthritis-therapy-using-laser-vibration-measurement_a386039211.jpg","name":"default","width":"570","breakpoint":"1200"},{"src":"https:\/\/magazine.polytec.com\/fileadmin\/_processed_\/6\/9\/csm_osteoarthritis-therapy-using-laser-vibration-measurement_865730ff38.jpg.webp","type":"image\/webp","name":"large","width":"900","breakpoint":"992"},{"src":"https:\/\/magazine.polytec.com\/fileadmin\/_processed_\/6\/9\/csm_osteoarthritis-therapy-using-laser-vibration-measurement_865730ff38.jpg","name":"large","width":"900","breakpoint":"992"},{"src":"https:\/\/magazine.polytec.com\/fileadmin\/_processed_\/6\/9\/csm_osteoarthritis-therapy-using-laser-vibration-measurement_144bd29354.jpg.webp","type":"image\/webp","name":"medium","width":"1380","breakpoint":"768"},{"src":"https:\/\/magazine.polytec.com\/fileadmin\/_processed_\/6\/9\/csm_osteoarthritis-therapy-using-laser-vibration-measurement_144bd29354.jpg","name":"medium","width":"1380","breakpoint":"768"},{"src":"https:\/\/magazine.polytec.com\/fileadmin\/_processed_\/6\/9\/csm_osteoarthritis-therapy-using-laser-vibration-measurement_8aea221508.jpg.webp","type":"image\/webp","name":"extrasmall","width":"640","breakpoint":"320"},{"src":"https:\/\/magazine.polytec.com\/fileadmin\/_processed_\/6\/9\/csm_osteoarthritis-therapy-using-laser-vibration-measurement_8aea221508.jpg","name":"extrasmall","width":"640","breakpoint":"320"}],"default":{"src":"https:\/\/magazine.polytec.com\/fileadmin\/_processed_\/6\/9\/csm_osteoarthritis-therapy-using-laser-vibration-measurement_a386039211.jpg","alt":"human knee","title":""}},"link":"https:\/\/magazine.polytec.com\/fr\/osteoarthritis-therapy-using-laser-vibration-measurement","origUid":6984,"readingTime":"6 min","subline":"Laser vibration measurement enhances osteoarthritis therapy","tags":[{"title":"Biology & medical","uid":4},{"title":"General R&D","uid":6}],"technologies":[{"title":"Vibrometry","uid":214}],"title":"Non-contact alternative to dynamic and viscoelastic mechanical testing in cartilage","uid":6991,"visits":305},{"authors":[],"datetime":null,"description":"

Surface acoustic wave (SAW)-based acoustofluidics combines microfluidics with active microacoustic fields. 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