This marks our 25th year presenting the Hands-On Modal Testing Seminar. Join the more than 1000 engineers and technicians who have tested a Navcon JimBeam and a fully race prepared Porsche (One of the classes this year will be the first to conduct a modal test on the new Porsche 991 GT3). It is our goal, that upon completing this 4-day, 40 hour intensive short course, attendees will be able to plan, setup and conduct a modal test from start to finish. This training is about methods & applications. Modal theory is presented from the experimentalist’s point of view. Attendees acquire their own data and conduct their own analysis. There is no other modal testing seminar like this; it is truly is a Hands-On training.
Each class is limited to 10 attendees. Attendees are paired in groups of 2 and each group is provided a complete data acquisition system, test instrumentation, test structures, etc. Everyone will have their own computer with ME’scope and will do their own data reduction and analysis.
Hands-On Laboratories: More than 50% of the time is spent conducting lab exercises.
Fourier Analysis • Digital Signal Processing • Modal Measurements
Shaker Excitation Techniques and Linearity Measurements
JimBeam Impact Modal Test & JimBeam Shaker Laser Modal Test
Porsche Multi-Channel Modal Test & Porsche Sine Dwell Test
Box Beam Modal Test, Box Beam Time & Frequency Domain ODS & FRF-ODS
Modal Test Parameter Estimation
Modal Pretest Analysis • FEM-Test Correlation • FE Model Updating
You will create a finite element (FE) model of JimBeam; perform a dynamic analysis and calculate the FE modes; use the FE modes to conduct a modal pretest analysis; conduct a JimBeam modal test; correlate and pair the FE modes and Test modes using Mac and Orthogonality; and you will update your FE model to match your test results.
When you complete this training (1) you will know modal and (2) you will know ME’scope.
JimBeam Modal Test:
More than 1000 engineers and technicians have tested JimBeam since 1991. It is a bolted plate structure with stiffeners and masses which can also be used for structural dynamics modification (SDM) laboratories. Attendees will (1) create a finite element model of "JimBeam", (2) conduct a modal pretest analysis to identify the optimal excitation & response locations, (3) conduct an impact modal test of JimBeam, (4) correlate the FEM and Test results and (5) update the FEM to match the test data. JimBeam is a featured modal demo project in Vibrant Technology ME’ScopeVES and was the Round-Robin test article at IMAC 2009.
Porsche Race Car Modal
More than 1000 seminar attendees have conducted a multi-channel (SIMO) modal test on Navcon’s Porsche 930 or 916 since 1991. The 916 was retired from racing in August 2009 The Porsche modal is conducted Wednesday evening (~ 6:30 pm to 10 pm) and is a truly unique experience. The students develop the modal model geometry, acquire the modal data and animate the mode shapes. The evening culminates with a sine dwell test allowing the students to see and feel both the vehicle’s suspension and flexural modes and compare them with the animated mode shapes. The Porsche is also used to demonstrate shaker excitation methods (random, burst random, chirp, burst chirp, etc.)
Tuesday 8:30 am to 5:30 pm - Modal Training Wednesday 8:30 am to 5:30 pm - Modal Training,
5:30 pm to 6:30 pm - Dinner (Sandwiches or Pizza)
6:30 pm to 10:00 pm - Porsche Modal Test Thursday 8:30 am to 5:30 pm - Modal Training,
5:30 pm to 6:30 pm - Laser Vibrometry Laboratory Friday 8:30 am to 3:00 pm - Modal Training
[The seminar will end about 3 pm on Friday. If flying out of Orange County or Ontario, we recommend arranging for flights after 6 pm. If flying of of LAX (OUCH), we recommend flights after 7 pm. Attendees might also consider spending the weekend. There are many places to see in the LA area including: Disneyland, Knott Berry Farm, Universal Studios, Hollywood, Beverly Hills, Venice Beach, etc. You might also catch a car race at Willow Springs ...]