6/29/2023 0 Comments Tuning fork vibration mechanicsTo export the mesh to Elmer format we can right click it from Salome’s Object Browser, select Export and then UNV File. This because we will use $p$-elements within Elmer to set the order.Īfter we get our first results, we will inspect the resulting displacement field and figure out whether our mesh needs additional refinement. Note how the mesh has been kept to first order. Note that Salome 9.6.0 will automatically create the necessary mesh groups from geometry: we do not need to follow that step anymore. The full mesh parameters are reported below together with a picture of the mesh. In this episode we will use Justin’s tuning fork, which is a $512$ $\text$. I should also mention that tuning fork CAD models are available in other places online, for example on GRABCAD. In fact, we will use the same CAD model for the tuning fork as provided by Justin. The analysis we will be performing is largely inspired by those done by Ben Qui and Justin Black ( archived here), which I invite you to read beforehand. Today we solve for the normal modes of a tuning fork. In the Elastic Modes of a Metal Bar episode we used Elmer to solve for the normal modes of vibration of a metal bar. This is why a new series is being introduced now. Rather to conclude a series before taking up the next, I decided to develop all series in parallel, so to prevent the project to focus too much on the details of each single problem and instead allowing us to explore Elmer (and possibly other solvers) capabilities more freely. In fact, each topic could be followed up by many further episodes, as I plan to do. Sorry for the confusion… A Note About SeriesĪs you have probably noticed, in this project there are multiple series going on, for example the Home Studio or the Rigid Walled Room series. This due to the study having been setup with this terminology originally. In this episode, quite inappropriately, the handle of the tuning fork will be referred as prong while its prongs will be referred as tines. Project FilesĪll the files used for this project are available at the repositories below: In this new series of episode we will explore vibration further, integrating in it what we learned so far, and we will explore vibro-acoustic coupling with Elmer. In that episode we introduced Elmer by solving a linear elasticity eigenproblem, and mentioned how vibration is an integral part of acoustics, being vibrating bodies one of the principal causes of airborne sound radiation. The very first episode in which we introduced Elmer was the Elastic Modes of a Metal Bar episode.
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