How to Perform Structural Analyses Using Shock Response Spectra

Henrik Sönnerlind January 30, 2019

You can perform response spectrum analyses with a study type introduced in version 5.4 of the COMSOL Multiphysics® software. In this blog post, we will give an introduction to how you can analyze a structure subjected to a short transient excitation being described by a response spectrum.

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Thomas Forrister January 29, 2019

When you think of fire protection measures, what might come to mind first is the logistics of getting everyone out of the building safely (i.e., without exposure to hazardous smoke, chemicals, and hot temperatures). Supporting these procedures are active measures like alarm and sprinkler systems, and passive measures built into the structure to minimize damage. To ensure that a building is designed with fire protection in mind, engineers can simulate actions on structures exposed to fire.

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Bridget Paulus January 28, 2019

Cables provide power to sky-high airplanes, underground mines, and offshore wind farms. Depending on the use case, cables can have vastly different shapes, sizes, and environments — all of which affect their performance. In his keynote talk at the COMSOL Conference 2018 Lausanne, Adrien Charmetant of Nexans explained how multiphysics modeling is used to optimize cable designs. Below, you can find a summary and video of his presentation.

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Emily Ediger January 24, 2019

Known for her work in radium research, Berta Karlik is one of two scientists credited with the discovery of the 85th element, astatine. Berta Karlik is also recognized as a pioneer for women in STEM and was the first female professor at the University of Vienna.

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Brianne Christopher January 22, 2019

The EPFLoop team took the stage at the COMSOL Conference 2018 Lausanne with their hyperloop pod design, setting it down for the crowd to see. Learn about the different ways that the team of students and faculty from the École Polytechnique Fédérale de Lausanne, led by Mario Paolone and including Nicòlo Riva, Zsófia Sajó, and Dr. Lorenzo Benedetti, used multiphysics simulation to land in the top spot for hyperloop design at the 2018 SpaceX competition.

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Brianne Christopher January 21, 2019

In a fluid-structure interaction (FSI) scenario, the fluid can affect the structure, the structure can affect the fluid flow, or both. When modeling a device that relies on FSI, you may want to simulate one of these options, a combination, or all three. The Fluid-Structure Interaction multiphysics coupling in the COMSOL® software makes it easy to implement FSI in your analyses. In this blog post, we study the flow through a ball check valve for different flow directions and pressures.

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Thomas Forrister January 18, 2019

You just got the latest smartphone, game console, or tablet. Eager to use it, you set it down to read the directions — but your child grabs it and starts shaking it around. The good news is that the device probably still works, as the internal electronic components have to be certified to function after experiencing certain shock loads. To analyze the shock response of an electronic part (like a circuit board), engineers can use numerical modeling.

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James Gaffney January 17, 2019

As the story goes, Archimedes was struggling with a case of suspected golden crown fraud. While taking a bath, inspiration hit: Submerging an object displaces the same amount of water as the object’s volume, so he could expose any dilutions to the gold. Archimedes was so pleased, he yelled “eureka!” But would anyone have heard the now-famous shout? Using simulation, we can evaluate the acoustics of resonant and reverberant enclosed spaces, like bathrooms, and how they respond to fundamental sources.

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Erik Melin January 16, 2019

The goal of mesh adaptation is to modify the mesh to solve a problem more efficiently. We want to use as few elements as possible to obtain an accurate solution. Typically, we would like a coarser mesh in regions that are not very important and a more refined mesh in regions of interest. We might even consider anisotropic elements. As of version 5.4, the COMSOL Multiphysics® software includes enhanced tools to adapt a mesh. Let’s take a look.

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Bridget Paulus January 14, 2019

How can teachers improve student learning in undergraduate science, technology, engineering, and mathematics (STEM) courses? To find out, Ivana Milanovic, a professor at the University of Hartford, developed a simulation-based approach that combines problem-based learning (PBL) and inquiry-based learning (IBL). Milanovic discussed her strategy and its benefits during her keynote talk at the COMSOL Conference 2018 Boston. Below, you can find a summary and video recording of her presentation.

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Bridget Paulus January 11, 2019

From blood pressure sensors to electronic money cards, planar coils are widely used. Found on circuit boards, these coils are a good choice for inductive coupling, especially when space is limited. When designing these coils, it’s important to calculate both their inductance and resistance, as these factors play a key role in the device’s performance. To do just that, engineers can use layered shell functionality in the COMSOL® software, which enables them to model all coils on one plane.

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