How to obtain the mass, stiffness, and damping matrices of a shear structure with TMDs distributed in the structure's floors?

16 December 2022 1 9K Report

K, M, and C of shear building with Distributed TMDs

To obtain the mass, stiffness, and damping matrices of a shear structure with TMDs (tuned mass dampers) distributed in the structure's floors, you can use a combination of analytical and experimental methods. Here are some general steps you can follow:

Analyze the structure's natural frequencies and modes of vibration using a finite element analysis (FEA) software or other analytical method.

Measure the structure's response to an excitation, such as ambient vibrations or a controlled input, using sensors such as accelerometers.

Use the measured response data to identify the modal properties of the structure, such as natural frequencies and mode shapes.

Determine the mass, stiffness, and damping matrices for the TMDs based on the design and properties of the TMDs.

Incorporate the TMD matrices into the overall mass, stiffness, and damping matrices of the structure using a modal combination method, such as the Craig-Bampton method or the component mode synthesis method.

Validate the model by comparing the predicted response of the structure with TMDs to the measured response.

Note: the TMDs can be modeled as a point mass-spring-damper system and added to the main structure matrices using substructuring method or Craig-Bampton method, this will change the natural frequency and damping ratio of the main structure.

Badges
Science topic

More Mahdi Sadeghi's questions See All

Which SAR dataset to use for generating coherency matrix and performing target decomposition (Description) ?

Working on chandrayaan-2 DFSAR data, there are three datasets available: 1) Slant range image data product: The slant range complex image file. Each pixel is represented by two 4-byte floating...

02 March 2021 8,481 3 View

How to design a boost converter for a mppt controller?

I have a doubt on how to select the inductor and capacitor value when I want to implement MPPT controller. This is because we always take a maximum output voltage and current but in this case, we...

28 February 2021 3,637 2 View

How to identify what type of fillers are in a polymer?

Hello everyone, I have some PHAs blended with fillers and nucleating agents, yet I don't know what kind of fillers or nucleating agents. The producer has shut down and there's no way to get in...

24 February 2021 1,356 8 View

How to calculate refractive index (n and kvalue) against energy (in eV) data for alloyed nanomaterials through Independent Phase Approximation method?

Suggest me the method or some other software to calculate the above said data for nanoparticles.

21 February 2021 3,350 7 View

How to find the air side pressure drop in a spiral fin tube bundle cross flow heat exchanger?

How to find the air side pressure drop in a spiral fin cross flow heat exchanger? The pressure difference at the inlet and outlet is very low compared to the experimental results, which I...

18 February 2021 1,109 2 View

Any methods to train a neural network with random (stochastic) and non-measurable variable?

Dear scholars, I was wondering if there are any scientific methods to train a neural network or ANFIS when one of the input variables is stochastic (random) and more importantly non-measurable?...

17 February 2021 1,909 3 View

How to visualize stress in a coating defined by "Skin" in Abaqus?

Hello All! I'm trying to model a contact between a coated substrate and a tip in Abaqus. The coating is ultra-thin compared to the geometry of the substrate. So I defined the coating using the...

16 February 2021 1,594 3 View

What is best technique to quantify necrotic cell death of specific cell populations?

I currently using FACS (Aurora Cytek) to quantify necrotic Gr1+ cell death from the spleens of immune competent mice. I target Gr1+ cells in the spleens of tumor-bearing mice using a photodynamic...

08 February 2021 733 6 View

How can I convert permeability unit from barrer to m^2 for using COMSOL MultiPhysics?

I am looking for gas permeability of PDMS for simulation in COMSOL MultiPhysics and using creeping flow , fluid and matrix properties. The permeability unit in COMSOL is m^2 whereas I have the...

08 February 2021 4,305 2 View

Can I modify vermiculite or perlite by adding nutrients to control a certain situation?

I need to assimilate a determining condition for the plant. However, I need to ask you if it is possible to change the properties and concentration of plant nutrients in this material like perlite...

04 February 2021 8,616 11 View

How to classify strictly upper triangular matrices by similarity?

Let F be a field. Consider U, the set of n times n strictly upper triangular matrices in F. For X, Y in U, we call them similar if there exists some S, which is non-degenerate and upper...

01 March 2021 2,957 8 View

How can I generate random samples from Bingham distribution in R? How can I construct those symmetric matrices?

in the function rbingham(n,A) in R software how can I construct that A (symmetric) matrix?

24 February 2021 3,528 3 View

What is the damping coefficient of Well's/impulse turbine that may be introduced into a mechanical oscillation model to simulate the PTO damping?

In tank experiments, it is easy to simulate the PTO damping by the use of orifices, however in modeling full scale and real conditions the trurbine damping coefficient must be added to the water...

31 January 2021 7,325 1 View

Matrix based scientific data analysis: extrapolating to matrices of sets?

Data sets, when structured, can be put in vector form (v(1)...v(n)), adding time dependency it's v(i, t) for i=1...n and t=1...T. Then we have a matrix of terms v(i, j)... Matrices are important,...

30 January 2021 9,295 6 View

Standard addition calibration without blank matrix available?

I have a problem of analytical chemistry. We are working on a spectroscopy technique (FTIR) for the quantification of a mineral phase in complex matrices. We intended to use chemometric techniques...

12 January 2021 7,739 1 View

Is there any suitable methods available to overcome efflorescence in earthen walls?

Many of us assuming that dampness cause efflorescence over the walls, Is that right? How to avoid these issues in a newly constructed walls? Comment your ideas

28 December 2020 3,883 2 View

How to export Mass and Stiffness matrices using Ansys Workbench?

Hello, I am trying to export Mass and Stiffness matrices using Ansys Workbench via Modal analysis modular, with APDL commands inserted. However, there is no .matrix file generated. Could anyone...

17 December 2020 1,196 5 View

Confusion matrix interpretation - does my class imbalance result in the difference in precision?

I the LightGBM algorithm to predict the outcome of tennis matches. Next I made two confusion matrices, one for the training set and one for the test set. I calculated stats as precision, recall,...

08 December 2020 2,969 3 View

How does the performance of AgNPs vary when they are directly coated on a substrate vs when they are embedded in solid matrices before application?

Is the surface area and accessibility entirely different in these two cases? If yes, then, does that have a significant influence on the performance? Since my work pertains to antibiofouling...

07 December 2020 6,285 3 View

How do I linearize a model that contains the min() function, to derive state space matrices?

I'm trying to linearize a non-linear model and write it in state-space form (derive state-space matrices) for control and optimization purposes. The nonlinear model is: x(k+1)=f(x(k),u(k),d(k)),...

06 December 2020 9,029 3 View