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  • Users: n1210933
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  1. n1210933

    Dynamic Simulation Constraints Problems

    Hi, I have a couple of questions about Dynamic Simulation. Firstly, what is it based on? Is it still ADAMS or have they moved to something else (I can't find anything about this on the net)? It seems reasonably powerful in terms of what it lets you do, how does it compare to the other...
  2. n1210933

    Help with ideas for cooling system...

    Hello, I'm working on a test stand for items of plant that are usually submerged in cold, fast moving water. They have a cooling demand of between 36kW and 900kW, and vary a lot in shape and size. Assuming that we can't just plumb directly into the onboard heat exchangers, what can we do to...
  3. n1210933

    Rough cost of reinforced concrete per metre cubed

    Good point! I'm in the UK.
  4. n1210933

    Rough cost of reinforced concrete per metre cubed

    Hello, I'm preparing a budget cost for a test stand and I'm after a very rough cost/m^3 of reinforced concrete. I know the cost varies a lot with the amount of reinforcement and shuttering required (and a host of other factors that a mechanical engineer can't even comprehend) but if anyone can...
  5. n1210933

    HPU Sizing from time history of forces

    Hi, Thanks for your input, its very helpful. We have two MTS HPUs in our facility already and we'd like to use them again so that we can borrow capacity from them when not in use. I'm in touch with them already but we are doing some preliminary design so that we can do some costings.
  6. n1210933

    HPU Sizing from time history of forces

    Thanks, just needed to check if my theory was correct!
  7. n1210933

    HPU Sizing from time history of forces

    Hi, I am designing a test rig which will apply forces to a rotating shaft via hydraulic cylinders. We have a spreadsheet giving the size of these forces against time, so my question is this: If we know the deflection to the shaft caused by a given force, can I use the gradient of the...
  8. n1210933

    Looking for a big flexible coupling...

    Thanks for all the answers, I've found a driveshaft on the Dana website that will do for now as it gives the dimensions of a driveshaft that will transmit 15MNm.
  9. n1210933

    Looking for a big flexible coupling...

    15MNm is the peak torque, fatigue loads would be half that or less.
  10. n1210933

    Looking for a big flexible coupling...

    Hi, I'm working on a big test rig for generators and gearboxes. The prime mover outputs at 10-30rpm and 15MNm torque, and we will be fatigue testing and doing ultimate load testing so it will have to handle shock loads. The coupling will have to accomodate radial, axial, and angular...
  11. n1210933

    Help with hydraulic circuit for wave energy device

    Thanks a lot, all the answers have been very useful! I figured out the check valve thing myself but I was glad to know I was more or less on the right track with an accumulator. You're right about the buoyancy forces, what I did was vary the mechanical advantage for the ones that pump on the...
  12. n1210933

    Help with hydraulic circuit for wave energy device

    I am a mechanical engineer with a small energy consultancy. I remember the basics of hydraulic circuits from university but I'm a bit stuck as for how to go about getting the power out of this wave energy concept I've been working on. The basic idea is a matrix of 25 large (5m x 5m x 5m)...

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