## Analyzing Vibrations in Rotating Machinery Due to Bearing Misalignment

##### Prashant Srivastava June 25, 2019

You can use structural analysis to compare the angular velocity, axial displacement, and bearing reaction moment on the shaft for rotating machinery with aligned and misaligned bearings.

### Introduction to Modeling Acoustic-Structure Interactions in COMSOL®

##### Jinlan Huang June 12, 2019

To model an ASI problem, you need to account for the behavior of elastic waves in solids, pressure waves in fluids, and their interaction. The COMSOL® software includes interfaces for doing so.

### Frequency Response of Mechanical Systems

##### Henrik Sönnerlind June 5, 2019

Read this blog post for a detailed look at damped mechanical systems, a guide to setting up frequency-response analyses in COMSOL®, and a discussion of how to interpret your results.

### How to Use Lumped Elements to Model a Mechanical System

##### Ajit Bhuddi May 29, 2019

Modeling a large, complex system? You may want to simplify configurations in the model setup to better understand it, but how? Enter the Lumped Mechanical System interface in COMSOL Multiphysics.

### Analyzing Slope Stability Through the Shear Strength Reduction Method

##### Emily Ediger May 28, 2019

Dams that are poorly designed or constructed are likely to fail. However, geotechnical engineers can account for the stability and reliability of a dam long before the structure is even built.

### Evaluating the Impact of Bearing Misalignment on Rotor Vibration

##### Bridget Paulus May 14, 2019

Bearings are found in devices ranging from MEMS and turbines to electric motors and even ships. How we account for a bearing’s misalignment (and the resulting rotor vibration) depends on its use.

### Verification Model: Postbuckling Analysis of a Spherical Cap

##### Thomas Forrister April 16, 2019

Think about what happens to a soda or beer can when you crush it. This phenomenon is called buckling, in which compressive stress causes sudden failure in a structure.

### Defying Gravity with a Realistic Acoustic Levitator Model

##### Thomas Forrister March 27, 2019

It’s not just science fiction: Objects really can levitate. 1 way this is possible is by using sound waves to lift and suspend particles midair. Simulation can broaden the use of this technology.

### Modeling Multi-Ply Materials with Composite Materials Technology

##### GuestEric Linvill March 26, 2019

In a follow-up to a previous blog post on paper mechanics modeling, Eric Linvill of Lightness by Design compares 3 methods of analysis for multi-ply materials such as paperboard.

### Modeling Fluid-Structure Interaction in Multibody Mechanisms

##### Soumya SS March 20, 2019

To model advanced FSI scenarios, such as swimming mechanisms or airflow around a wind turbine blade, you can use the Fluid-Structure Interaction, Pair multiphysics coupling.

### Evaluating the Necking of an Elastoplastic Metal Bar Benchmark Model

##### Thomas Forrister March 18, 2019

To determine the strength of elastoplastic materials, engineers often use uniaxial testing to analyze necking instability. This benchmark model proves that simulation is also a reliable method.