Distributed loads can be converted to nodal forces / moments by integration. For example, a uniformly distributed force distribution F(x) dx along a beam of length L yields a force of F L/2 at each end and moments of M1 = -F L^2/12 and M2 = F L^2 / 12. You can think of this intuitively: half the force goes to each node, and the moment is the integral of pressure load * distance.
You can also think of this in terms of finite elements -- integrate the pressure load times the element shape functions. SUGAR uses a standard Euler-Bernoulli beam model. You can find the description in your favorite finite element book (e.g. by Hughes or Reddy).
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Is it possible to define uniformly distributed force. Like pressure on membrane?
Distributed loads can be converted to nodal forces / moments by integration. For example, a uniformly distributed force distribution F(x) dx along a beam of length L yields a force of F L/2 at each end and moments of M1 = -F L^2/12 and M2 = F L^2 / 12. You can think of this intuitively: half the force goes to each node, and the moment is the integral of pressure load * distance.
You can also think of this in terms of finite elements -- integrate the pressure load times the element shape functions. SUGAR uses a standard Euler-Bernoulli beam model. You can find the description in your favorite finite element book (e.g. by Hughes or Reddy).