Internet of Things (IoT)

Engineering IoT with ANSYS

MaryamNemaziePicWhat is the Internet of Things (IoT)? Our world is more connected than ever, thanks to the growing web of smart electronics that surround us every day. IoT is about enabling connectivity and embedded intelligence in devices. This connectivity will greatly streamline communications among our electronic devices, improving the way we live, work and play.

For Ozen Engineering, Inc. and ANSYS customers, creating innovative products with technologically demanding qualities is nothing new. The complete simulation and workflow technologies used to develop the ground-breaking products all around us are ready for the next generation of ubiquitous connectivity. Whether for stress, thermal, antenna, and power design applications, our simulation technologies are speeding the development of IoT devices, networking infrastructure, and cloud computing platforms.

Why are simulations so important in an IoT world?

IoT is here and it’s growing fast. Many companies don’t realize the power of conducting simulations, especially in the context of IoT. Generally speaking, ANSYS simulation technology allows innovators to develop higher quality products, reduce the cost of prototyping, and improve time to market. In essence, ANSYS simulation software allows you to predict with confidence that your products will thrive in the real world. In the context of IoT, simulations are now more important than ever because as all of these devices are connected, signal and power integrity become crucial. Innovators have to monitor the electromagnetic compatibility among all of these devices to ensure that the various signals are not interfering with one another.  What’s the point of embedding intelligence in devices if signals interfere, undermining the power of the device? However, electromagnetic interference is not the only issue to watch out for. There are a whole host of considerations, such as thermal and reliability issues, just to name a few! This is where ANSYS simulation software, such as an ANSYS Multiphysics package, unleashes the power to alleviate such concerns and would be just the tool in creating a reliable, high-performance prototype.

Find out how ANSYS simulation solutions can help you engineer high-performance electronic devices and systems for the Internet of Things by watching this brief video. Hungry to learn more? Please visit our ANSYS training schedule for upcoming courses: http://www.ozeninc.com/ansys-training-events/.  If you are interested in a technology demonstration, please contact Casey Heydari at 408-732-4665 or casey.heydari@ozeninc.com to schedule a demo today.

By Maryam Nemazie


 

Force Based Submodeling

CanOzcan_VesikalikEven with today’s increased computing power and optimized software, submodeling is a powerful technique to perform analysis on detailed regions of assemblies. Recent versions of ANSYS Mechanical software have easy to use implementation for submodeling, where one can perform cut boundary interpolations all in Workbench environment, without the need of writing good old APDL code.

Submodeling in ANSYS Mechanical (and APDL) is based on interpolation displacements from global level to submodel level at cut boundaries. This approach comes with the assumption that the stiffness of the submodel region does not differ much in stiffness from the global model. This assumption holds most of the time. However, there are cases where one would like to apply structural loads from global model, rather than the displacements. This is especially a requirement when the stiffness of the model is reduced in the modeled sub region. The technique can be also called “Force Based Submodeling”. Below is a naïve implementation of force based submodeling for solid-to-solid case.

Can Pic 1

Need: We would like to apply the force being carried by supports in a submodel, rather than performing a displacement based submodel. The design of the support is changed such that it will invalidate global displacement results. Therefore we propose a way to extract reaction forces at cut boundaries rather than displacements in classical submodeling sense.

Algorithm:

  1. Perform global analysis with coarse mesh
  2. Generate a submodel(a.k.a. initial submodel) analysis, with exact same geometry of global analysis with coarse mesh. This will allow one to get reaction forces where cut-boundary displacements are applied
  3. Extract reaction forces on cut-boundary faces
    1. Can extract reaction forces on whole surfaces and apply them as remote forces with deformable boundary option
    2. Can extract reaction forces on each node and apply in final submodel by ensuring same mesh on cut-boundaries between initial submodel and final submodel
  4. Generate a submodel (a.k.a. final submodel) with updated support design
  5. Apply reaction forces calculated from initial submodel
  6. Solve for final submodel and post-process

Example Case#1

I have built a simple model to test the above mentioned concept:

Set 1

 

 

 

 

Fig. Boundary conditions (a) Global model (b) Initial submodel

When I compare the stress at fixed support surface I get identical Von Mises stress distribution.

Set 2

 

 

 

 

Fig. Von Mises stress at fixed support surface (a) Global model (b) Initial submodel

An APDL code is developed to extract nodal reaction forces from the initial sub model as follows:

Can Image

The text file generated by APDL code based on “initial submodel”, is then manually copied to solver directory of the “final submodel”. This process can be automized by saving the file to “user files” directory instead.

The content of the reaction force text file is then read into “final submodel” by the following APDL code:

APDL code to read submodel data

Comparing the stresses and displacements there is perfect match between global, initial and final submodel models.

Set 3

 

 

 

Fig. Von Mises Stress (a) Global Model (b) Initial submodel (c) Final submodel

Set 4

 

 

 

Fig. Total displacements (a) Global Model (b) Initial submodel (c) Final submodel

 

By Can Ozcan


White Paper-Electric Machine Design Methodology

There is a clear global demand for a comprehensive electric machine design methodology to satisfy power efficiency requirements and support new applications. By employing finite element methods early in the design process, Engineers can accelerate development and achieve higher machine efficiencies using less material, which reduces costs. Electric machine design is a multi-physics problem. Multi-physics analysis accelerates the design process, increases design accuracy, and can be used to optimize the performance of the electrical machine before the first physical prototype.

This white paper is an overview of electric machine design methodology which is a multi-physics problem.

Download Whitepaper

ANSYS Maxwell is a powerful tool for electric machine design and it can be directly coupled with ANSYS Simplorer for electric drive and digital control system design. ANSYS Mechanical/ANSYS CFD can be used for multi-physics– thermal, stress and acoustical analysis.

Check our industry solution page-Electric Motors for relevant technical papers, workshop problems and videos to download.

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Tech Tip: What is new in ANSYS HFSS R17

Modelithics CLR Library for ANSYS Electronics Desktop/HFSS

Modelithics models are now compatible with ANSYS Electronics Desktop and HFSS circuit design. The Modelithics CLR Library for ANSYS HFSS improves the accuracy level of RF/Microwave electronic design. Once, the Modelithics CLR Library is installed into the ANSYS Electronics Desktop under the Component Libraries, designers can access the high accuracy simulation models by Modelithics from within the ANSYS HFSS design environment.

Modelithics

Modelithics CLR Library can be imported and solved with HFSS accurate EM co-simulation

The Modelithics CLR library contains Resistors, Inductors and Capacitors from the leading and popular vendors. The Modelithics models are measurement-based, scalable, statistical analysis capable and well-documented which make ANSYS HFSS EM simulation more accurate and valuable. The Modelithics models enhance ANSYS HFSS Electromagnetic (EM) co-simulation.

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Tech Tip: New Display Features

Two simple ease-of-use features have been introduced to improve graphics display for Mechanical applications in ANSYS R17.

“Color by Material”
While preparing material properties in Engineering Data, users can designate colors for materials. After assigning materials to geometry in Mechanical, change the “Display Style” (under Details of Geometry) to color by material.

ANSYS 17 Display Cap Slice & Color Material

This Mechanical R17 screenshot highlights tools to color by material and display by capped slice.

“Cap Sliced View”
The sliced view graphics display now includes the option to cap solid interiors with cross-hatches. The cap surface can be displayed by body color or entirely in red. Access the sliced view tool by clicking on the “New Section Plane” icon in the toolbar.

These new display feature help to better understand large assemblies and to export more-detailed images of geometry.

Please call Ozen Engineering Inc. and ask to speak with an engineer to learn how ANSYS tools can improve productivity and innovation in product development.
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