A violin was suspended on a frame to a imitate free-free boundary condition. Sentek Dynamics’ BT-100M shaker was used to excite a violin at the base of its front panel. Polytec’s PSV500 laser scanner was used to measure and acquire the data from the back panel of the violin. Crystal Instrument’s EDM Modal software processed and analyzed the dataset to provide the modal parameters of the violin.
Read moreUpdated Ground Vibration Testing Video
Ground Vibration Testing (GVT) includes the modal analysis of an aircraft and its sub-assembly components to analyze and detect any changes to their structural properties.
Read moreNEW – Patented GPS Time Stamping Technology Available on the CoCo-80X
Crystal Instruments CoCo-80X handheld dynamic signal analyzer allows users to acquire measurements with unparalleled convenience in the field. The rugged design features a compact display for quick, easy, and accurate data recording and analysis. This powerful hardware system is now combined with Crystal Instruments patented GPS time synchronization technology, featuring a time accuracy of 100 ns. Users can now execute Operational Modal Analysis to study the dynamic characteristics of large structures such as bridges and buildings.
Read moreOperational Modal Analysis featuring GPS Time Stamping Technology
The rugged and intuitive CoCo-80X handheld system is now combined with Crystal Instruments’ patented GPS time synchronization technology (featuring a time accuracy of 100 ns) to further expand field measurement capabilities. Users are now able to execute Operational Modal Analysis using the handheld CoCo-80X to study the dynamic characteristics of large structures such as bridges and buildings.
Read moreAnnouncing EDM 11.1
Our team is thrilled to announce the 11.1 version of Engineering Data Management (EDM) software. Packed with a range of new features and improvements, this update is designed to elevate the user experience.
Read moreModal Analysis Seminar with Dr. Pete Avitable
Seminar attendees learned everything from the basics of setting up a modal test to best practices in testing and in-depth modal theory. Modal testing variations included hammer excitation, SIMO shaker excitation, and MIMO shaker excitation.
Read moreHow to use GPS signals in dynamic signal measurement applications
I recently created a new PPT to explain how GPS time stamping technology can help conduct dynamic signal measurements for both indoor and outdoor applications. Download a copy.
Read moreModal Analysis of Satellite using EDM Modal
The Canadian Space Agency recently performed the Modal Analysis of a RADARSAT Satellite using five modal shakers. It is important to obtain the modal analysis of the unit-under-test because information about the natural frequencies, damping coefficients and mode shapes can be used to optimize its design and improve its structural behavior. The modal parameters about the mechanical properties of a structure help users understand its vibration characteristics during operating conditions.
Read moreNovember 2022 modal training seminar with Dr. Pete Avitabile (Vancouver, BC)
The latest Experimental Modal Analysis Seminar was held from November 8-9, 2022 in Vancouver, British Columbia. Crystal Instruments partnered with Dalimar Instruments to present these modal training seminars in Canada. During the seminar, Dr. Peter Avitabile covered the basics of modal measurements, impact hammer tests, and shaker tests. The modal training seminar participants learned the theory behind techniques, performed measurements, and received hands-on training experience.
Read moreMaking Modal Measurements in Montreal
Dalimar Instruments and Crystal Instruments recently hosted an Experimental Modal Measurement and Analysis Seminar with Dr. Peter Avitabile from September 19th to September 20th in Montreal, Quebec. This joint seminar was held at Château Vaudreuil, an excellent facility with convenient amenities.
Read moreCoCo Hammer Impact Testing Plan in EDM Modal
The rugged and portable CoCo hardware allows users to perform convenient measurement recordings and analysis in the field. Field operations are extended with the integration of EDM Modal software to provide a seamless modal analysis procedure.
Read moreDynamic Stiffness Measurement or Conversion
Frequency Response Function (FRF) is widely used in structural testing. Accelerometers are typically used and the acceleration vs. excitation force is measured as FRFs.
Read moreModal Testing to Improve Team Icewave’s Battle Performance
Written in collaboration between PCB Piezotronics, Inc., Crystal Instruments, and Team Icewave
Icewave has an overall record of seven wins and six losses. Marc DeVidts, Icewave creator and team lead, believes some of the losses may have been due to the blade not impacting opponents effectively. Because of the power behind Icewave, some of these losses can be attributed to self-inflicted damage from its own rotating horizontal blade. The modal testing will be used to help increase striking effectiveness.
Read moreModal Analysis of Hood Fan Using EDM Modal
The experimental object in this modal test is a hood cross-flow fan with an overall structure that includes a roulette wheel, rotor frame and cross-flow blades that are composed of metal materials. The fan is hung using bungee cords to imitate free-free boundary conditions.
Read moreModal Analysis of Locomotive Wheel Using EDM Modal
This article examines the acquisition of modal characteristics from a train wheel through experimental modal analysis. Train wheel and rail interactions are critical components worth studying. If the wheel-rail interactions while accelerating or braking excite any of the system modes during the ride operation, it can induce an undesirable effect upon the passengers’ ride and comfort. Hence, the execution of modal analysis is vitally important.
Read moreModal Analysis of Headlight Assembly Using EDM Modal
Modal testing provides a crucial verification link in structural design by verifying the accuracy of simulation results and determining the structural characteristics of the actual product.
Read moreEDM 10.0 Release
Crystal Instruments is excited to announce the release of EDM 10.0, the latest software version for all Spider and CoCo products serving advanced and fundamental industries in addition to furthering academic advancements.
Read moreModal Data Acquisition Using CoCo Testing Plan on CoCo-80X/90X
The Modal Data Acquisition (MDA) function for the CoCo-80X/90 allows users to conveniently acquire modal data in the field. The CoCo Testing Plan provides an overview of the measurement process and also provides the ability to customize the measurement entries.
This article describes a step-by-step process of the CoCo MDA function along with the CoCo Testing Plan feature. A brief overview of transferring the data from the CoCo to EDM Modal in order to post-process the data is also presented.
Read moreModal Analysis of Bullet Train Wheel using EDM Modal
This article examines the acquisition of modal characteristics from a bullet train wheel by performing experimental modal analysis. The wheel vibrations affect the dynamics of the wheel-rail interactions. Understanding these vibration characteristics will help mitigate the vibration and noise at high speeds.
Read moreOregon State University Purchased High Channel Count Spider-80SGi System for Geotechnical Projects
Oregon State University in Corvallis, OR recently purchased a 64-channel Spider-80SGi data acquisition system. Dr. Armin W. Stuedlein, professor of geotechnical engineering said the Spider DAQ will be used for studies on in-situ liquefaction and cyclic softening studies, performance of ground improvements, and testing of full-scale foundations.
Read more