Recent content by Zirkus

I see, that is an important aspect when accounting for the residual flexibility as I probably can't measure natural shapes corresponding to high frequencies. But if I only work with a FE model, I usually compute all of the eigenvalues and eigenshapes of the components. For example in Matlab I...

I see, so this very good result is in fact an exception caused by the problem being too simple. I was planning to consider a truss system as a second example, but in that case the interface would again consist of only several DOFs, so I will rather attempt one of your tips. Could I ask you...

Dear engineers and physicists, I would like to ask you a question about Component Mode Synthesis (CMS), which is the topic of my bachelor thesis. My primary resource is the classical AIAA article "Coupling of Substructures for Dynamic Analyses: an Overview" by Prof. Craig. For now I am...

Thank you Chris, it does indeed seem to be a trend for the future. However I haven't yet found any description of how the automatic control is implemented (PWM presumably, but that doesn't say much). Any tips where and how to look please? Googling "vehicle with electric water pump" is not too...

Hi everyone, I am conducting a small research on how many manufacturers (if any) use electric water pumps in production vehicles. So far I found that many Audi models have auxiliary electric pumps which help the main mechanical one when needed (and maybe to run for some minute after turning the...

That is completely true, as a matter of fact I won't be doing the measurment at all in the end, so your nice answer goes in vain...sorry about that. At least I lerned a bit about dimensional analysis, mostly from these lecture notes from MIT, which describe the abovementioned situation of...

I see, that is what I suspected, thank you. If I tried to list all the relevant quantities in this problem I would get to something like: T_i=T_i(u_{air}, T_{air},\rho_{air},c_{p,{air}},\nu_{air},\dot{m}_{coolant},\rho_{coolant},c_{p,{coolant}},\nu_{coolant},P_b(t),N(t),\beta(t)), where the...

We defined it similarly like the article on wiki does, so I won't rewrite it...Stress on Wikipedia Most likely there are other methods or other terminology, I'm not a native speaker so i can't tell the subtle differences that well, sorry about that.

Hi, I have a problem with measuring cooling performance of a car on a chassis dynamometer. But maybe I should start with the theoretical part of my problem, namely with the dimensional analysis. If I have a physical system and I am interested in finding one variable as a function of all other...

Hello, I am not an expert on elasticity but this really looks quite straightforward. Let's first find the stress vector T (I'm using T instead of σ to avoid confusion with the stress tensor). You will get it by multiplying the (diagonal) stress tensor by your normal vector as T=(σ1l, σ2m, σ3n)...