Howto calculate the thickness resonace frequency of a 1-3 composites?

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Comsol, mechanical damping, not convergence?

When I compute a piezoelectric transducer in a water domain, the solution works well and convergence. However, when I add mechanical damping to the piezoelectric material and keep others all the...

04 May 2017 8,745 1 View

Anybody have experience on simulate the transducer fabricated by 1-3 composites(piezoelectric rods embed in epoxy)?

I simulate the transducer model by comsol. However, the results are weird for the far field level, what I want to know is if it is not easy to simulate this composites? The files are attached.

06 July 2016 4,109 3 View

How to calculate the output electric power of transducer with Comsol?

When I apply 1V on the PZT disc, I want to know how much electric power transfer into mechanical power, how much is consumed by itself?

06 July 2016 7,608 1 View

Nonuniform acoustic field is generated by simulating the transducer,why?

Hi, when I simulate the 1-3 piezoelectric composite transducer, the generated acoustic field is nonuniform. the acoustic field picture is attached, I want to know why？

05 June 2016 7,562 9 View

Why not the far field calculation does not work in Frequency-Domain, Perturbation ?

Hi, I simulate the transducer performance under pre-stressed, and I reference the template "tonpilz transducer prestress" in the library. Far field pressure works under frequency domain, but I can...

04 May 2016 9,105 3 View

Comsol, When I simulate the impedance of 1-3 piezoelectric composite, how to remove the resonance mode of polymer?

Hi, all I want to simulate the impedance of 1-3 piezoelectric composite using piezoelectric device interface, however the results resonance peaks always couple with polymer vibration, I don...

04 May 2016 1,878 1 View

How to constraint the transducer by comsol?

hi, when I simulate the transducer by comsol, I found that the constrain position effects the impedance spectrum significantly, I want to know the proper restrain which has little influence...

03 April 2016 6,214 4 View

The model heat transfer established by comsol can not convergence?

The heat transfer model convergence at first, but when I increase the electric potential or calculation time, it turns do not convergence, I want to know why, wrong boundary condition, or...

03 April 2016 731 5 View

How to simulate the band width and sensitivity of transducer using Comsol?

Hello, everyone, using far- field calculation to compute band width, however I don not know how to postprocess the data obtain from the polar plot data? Thank you all!

03 April 2016 3,009 2 View

Geotechnical Engineering (Proceedings of the ICE) time review?

Hello everyone, I recently submitted an article to Geotechnical Engineering (Proceedings of the ICE), and the current status has been listed as "EiC Pre-assessment: Ready" for the past 20 days. I...

10 August 2024 6,493 1 View

I have get this error when i calculated the geometrical optimization for prco3, it takes 12 hours until gives this message in the outputfile?

Fatal error in MPI_Allreduce: Other MPI error, error stack: MPI_Allreduce(1628)......: MPI_Allreduce(sbuf=000002459254A180, rbuf=000002459F86A140, count=4851, MPI_DOUBLE_COMPLEX, MPI_SUM,...

09 August 2024 7,615 1 View

Regarding LBM in Boiling?

What should be the equation for halfway bounce back boundary condition for flow field with forcing term?

08 August 2024 7,938 1 View

How can I apply boundary conditions in an orthotropic steel deck numerical model using ABAQUS software?

I am trying to simulate vehicular loading on an orthotopic steel deck bridge section in ABAQUS software. The red arrow mark in the attached figure indicates the direction in which the vehicle will...

08 August 2024 719 0 View

How are iso-frequency contours plotted?

Let's say we have a standard, regular hexagonal honeycomb with a 3-arm primitive unit cell (something like the figure attached; the figure is only representative and not drawn to scale). The...

07 August 2024 1,937 1 View

Stability of the Solar System: Insights from Einstein’s Equations ?

The stability of the Solar System is a complex subject that blends the classical framework of Newtonian mechanics with the modern insights provided by General Relativity (GR). Understanding this...

07 August 2024 2,569 1 View

What is the prepared reference material that can be used in inductively coupled plasma optical emission spectrometry (ICP-OES) to measure REE and U ?

What is the prepared reference material that can be used in the ICPE-9820 Shimadzu Japan instrument, which employs inductively coupled plasma optical emission spectrometry (ICP-OES) to measure...

06 August 2024 1,896 1 View

How effective is the Citi Bloc standard basket in enhancing the accuracy and comparability of international construction cost assessments?

Citi BLOC Standard Basket Definitions: A standardized unit representing a fixed basket of construction materials, labor, and equipment costs priced in various cities. Purpose: To create a common...

04 August 2024 8,997 1 View

How to correctly use the UTE and ZTE pulse sequences in Bruker's ParaVision software?

I am using a Bruker 600M solid-state NMR spectrometer with a Micro 2.5 microimaging system. The test sample is a tube of 1M LiCl aqueous solution, and the nucleus detected is 1H. I am trying to...

01 August 2024 9,227 1 View

Some new emerging problems on application of RL for scheduling in IoT networks?

I have seen plenty of existing works on applied Reinforcement Learning (RL) policies for optimized scheduling in IoT networks including Q-learning, DQNs, and the newer ones including PPO for...

01 August 2024 8,754 2 View