Define excavator load train

SOFiSTiK Teddy
1

Hi all,

I’m struggling with defining a load train for an excavator. The excavator has two “wheels” of 0.7x5.7 sitting at 3.9m across from each other. My current load train definition is as follows (using the Y parameter to offset the “wheels” but it doesn’t seem to work):

LC 906 TYPE none ; trai USER WIDT 4.6[m]
trpl P 570 PFAC 1 A 0 Y 1.95[m] BW 0.7[m] LW 5.7[m]
trpl P 570 PFAC 1 A 0 Y -1.95[m] BW 0.7[m] LW 5.7[m]

I end up with the first image which is the two “wheels” on top of one another. What I’m after is the second image.

Any help/explanation where I’m going wrong will be appreciated.

image
image567×800 71.1 KB

2

Hi,
Could you please share your code so I can review it in detail? There might be an issue in another part of the code!

3

Thanks for the reply, please find my code attached.

A workaround I found was to define a single track and copy it twice using the DY input. As an example:

LC 906 TYPE none ; trai USER  WIDT 3.9[m]
                   trpl P 570 PFAC 1 A 0 Y 0[m] BW 0.7[m] LW 5.7[m]

LC 500 TYPE 'L_E' Titl 'gr5: Excavator'
       COPY 906 TYPE GR0 REF #A.#m DX #dx3 DY 1.95 WIDE 4.5 YEX -
       COPY 906 TYPE GR0 REF #A.#m DX #dx3 DY -1.95 WIDE 4.5 YEX -

testBridge.sofistik (73.5 KB)
testBridge.dwg (368.5 KB)

4

Exactly, that’s what I usually do: I create a load case (LC) with the desired loading, then I create a set of load cases with a step, which allows the loads to move along the axis. You can also use the ELLA module!

5

Thanks :slight_smile: ELLA is next on my list to learn. For now I tried the SOFILOAD route as it appeared a bit more straightforward for a newbie.