dymola

I am integrating a relative small Finite Element (FE) model into Modelica. In doing so, I created a Model (Modelica class) that can read the mass (M) and stiffness (K) matrix in Matlab binary file format. I connected the FE model with some components from the Modelica Standard Library (Modelica.Mechanics.MultiBody). If M and K are very small (say 20x20), then Dymola is able to run the Model and provides pretty accurate results compared to Abaqus (but computational not that efficient). However, if I increase the complexity of the FE model that includes larger M and K (e.g. size(M)=[200,200]),

Using Dymola 2017. Case A) Calling an external c-script I have had success implementing simple external c functions that have no “# include <-->” statements: Modelica Function: function chirp input Modelica.SIunits.AngularVelocity w_start; input Modelica.SIunits.AngularVelocity w_end; input Real A; input Real M; input Real t; output Real u "output signal"; external "C" u=chirp(w_start,w_end,A,M,t) annotation(IncludeDirectory="modelica://ExternalFuncTest/Resources/Source/", Include="#include \"chirp.c\""); end chirp; C-script: double chirp(double w1, double w2, double A, double M, double time)

I have data of an experiment in a .mat file and a model written in dymola. I use the dymolaM.m file to send commands from matlab to dymola. In that way I can use matlab to optimize a parameter of my model. Matlab reads in the data from the .mat file, initialises dymola in a correct way, lets dymola simulate the model, reads in the output of dymola and compares it with the experimental data. This all works fine for a wile, but if I repeat the matlab dymola connection too much I always get the following error: ??? Error using ==> ddeexec The first argument 'channel' is not valid. Error in ==>

I want to use non-SI units in a Modelica model in a medical context. I am using Modelica in Dymola. Being an engineer I prefer the SI units. But my model parameters are sourced from medical publications and I want to avoid conversion mistakes. Medical units also simplify communication with doctors. For example, the unit "mmHg" (millimetres of mercury) is used instead of "Pa" for pressure. Pressure variables are defined in the model as follows: type Pressure_mmHg = Real (final quantity="Pressure", final unit="mmHg") Translating the model for simulation yields the following warning for every

Some settings in Dymola can be altered by setting flags in the "Commands" window: Some examples for flags are: Advanced.AutoFormatting Advanced.PedanticModelica Advanced.LogStartValuesForIterationVariables Hidden.PrintFailureToDifferentiate Is there a comprehensive list of all Dymola flags? Or, even better, a command to print such a list? Or, even better, something like the about:config in Firefox? Especially, I would like to change the default setting for the Save contents in one file checkbox to Directories - No Questions because version control software (git in my case) works better with