Structural strength and weight

Hi all,

I did a distance&speed directed evolution experiment, resulting in creatures
with HUGE muscle power.

Does the model in any way take strength aspects into account? A stick
connected to a strong muscle should be stronger and therefore heavier than
one connected to a weak muscle.

Frans

### Re: Structural strength and weight

> I did a distance&speed directed evolution experiment, resulting in
creatures
> with HUGE muscle power.
>
> Does the model in any way take strength aspects into account? A stick
> connected to a strong muscle should be stronger and therefore heavier than
> one connected to a weak muscle.

no, muscle strength is not connected with stick weight. stronger muscle
allows the stick to move faster with no penalty (until muscle energy
consumption is functioning again).

sz.

### Re: Structural strength and weight

That's a pity. when there are no penalties on properties that are important
for scoring in the fitness evaluation, evolutions will never converge and
develop only exponentially in on direction.

When muscle power only affects the speed of motion, then do I understand
correctly then that muscle power is a measure of energy
only, and that the physical model is not concerned with forces?

A very simple model for stick mass would be:
constant*average_power_of_attached_muscles^(2/3)*stick_length.
here 2/3 represents the relative dimensions of section modulus(length^3) and
cross section area of structural material. Muscle mass roughly will have the
same rationing.
With the mass property the inertia property would of course also be
affected.

Is there a description of the physical model and the effects taken into
account in simulation somewhere?

Frans

"szymon" schreef in bericht
news:am8aua\$eih\$1@cancer.cs.put.poznan.pl...
> > I did a distance&speed directed evolution experiment, resulting in
> creatures
> > with HUGE muscle power.
> >
> > Does the model in any way take strength aspects into account? A stick
> > connected to a strong muscle should be stronger and therefore heavier
than
> > one connected to a weak muscle.
>
> no, muscle strength is not connected with stick weight. stronger muscle
> allows the stick to move faster with no penalty (until muscle energy
> consumption is functioning again).
>
> sz.
>
>

### Re: Structural strength and weight

> That's a pity. when there are no penalties on properties that are
important
> for scoring in the fitness evaluation, evolutions will never converge and
> develop only exponentially in on direction.
>
> When muscle power only affects the speed of motion, then do I understand
> correctly then that muscle power is a measure of energy
> only, and that the physical model is not concerned with forces?
[...]

it is not that bad. i said that muscle strength is not connected with stick
weight but the resulting stick movement is based on true physics.
moreover, energy consumption in framsticks v1.x (soon in v2.x) also takes it
into account, eg. waving the paw needs less energy than jumping.

> Is there a description of the physical model and the effects taken into
> account in simulation somewhere?

probably not... :-(
there is a basic description somewhere on www but not very useful.

but you can always ask here.

sz.