In addition, the solutions obtained from the presented approach are exact and may be the benchmark for evaluating the accuracy of solutions of the other approximate methods. Since the order of the eigenproblem equation derived from the presented approach is much smaller than that derived from the conventional finite element method (FEM), the computer time consumed by the former is much less than that by the latter.
Findy whirling free#
It is found that the above-mentioned equations for the rotating 3D shaft-disk system take the same forms as the corresponding ones for the associated stationary two-dimensional (2D) Timoshenko beam carrying the same number of disks, so that the approaches for the free vibration analyses of the stationary 2D beam-disk system can be used to solve the title problem for obtaining the whirling speeds and mode shapes of a rotating 3D shaft-disk system. Endless excuses.In theory, the whirling motion of a shaft-disk system is three-dimensional (3D), however, if the transverse displacement in the vertical principal xy-plane and that in the horizontal principal xz-plane for the cross-section of the shaft located at the axial coordinate x are represented by a complex number, then the mass moment of inertia for unit shaft length (at x) and that for each rigid disk i can be combined with their associated gyroscopic moments (GMs) to form the frequency-dependent equivalent mass moments of inertia, respectively, in the equations of motion for the rotating Timoshenko shaft carrying arbitrary rigid disks. I hope that you read this before you've wasted money on their hardware because they've shown no indication that I'll be getting my money back. You don't build a product in 2019 that requires a service that US carriers started shutting down in 2016. Findy devices require 2G cellular service to work, and that's just nonsense. They did give me 30-Days free for troubleshooting purposes, and that's when I learned about the 2G limitation. When I received my Findy, the subscription that I pre-paid for was already expired. They'll talk you in circles until you give up and go away, but they have no actual desire to fix anything.
Additionally, Findy support is non-existent. It requires a 2G cellular connection that is virtually non-existent in the US already, and those that remain are scheduled to be turned off by early 2020 (by Findy's own admission). You can attach it to your keys or wallet, put in on your bag, hang it on your dog’s collar…Ĭ.Don’t worry if you split water on your findy – it’s waterproof dust-proof!įindy does not work in most of the US, and by next year not at all in the US. More colors will be available soon!Ī)Use the app to activate findy’s buzzer and diode and find your stuff faster and easier.ī)You’ve lost your phone? Just press findy’s button and make your phone ring.Ĭ)Never separate from your valuable things! Your phone will ring every time you go away without your findy (optional).Ī)Find your things by playing “hotter, cooler”.ī)Share your devices with people you trust so they can find them for you.Ĭ)You can add us much findy devices as you wish in one account.ĭ)Personalize your findy devices by choosing a name, color and picture for each one of them.Ī.Never waste time again looking for your stuff!ī.Find anything that has findy on it within 20 meters.
After that just send your findy back to us and we’ll give you a new one at half price.Ĭ)findy is in the universal white color that goes with everything. No preorders are needed ‘cause we’ve already invested in our product )ī)findy has a long-lasting battery – up to 1 year. Register on and buy findy device from or our dealers, attach it to your stuff and never lose or forget them againĪ)Your findy is ready for shipping. Having findy device you can search it with this app or you can make your phone ringing when you click its button.
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