Frames are rigid, stationary structures designed to support loads and must include at least one multi-force member. Machines are non-rigid structures where the parts can move relative to one another. Generally, they have an input and an output force and are designed to produce a mechanical advantage.

Solve for the support forces on the entire frame (FBD) if possible. Draw a FBD of each member: Consider all two-force bodies first.

Drawing a correct free-body diagram is the first and most important step in the process of solving an equilibrium problem. It is the basis for all the equilibrium equations you will write; if your free-body diagram is incorrect, your equations, analysis, and solutions will also be wrong.

In physics and engineering, a free body diagram (FBD; also called a force diagram) [1] is a graphical illustration used to visualize the applied forces, moments, and resulting reactions on a free body in a given condition. It depicts a body or connected bodies with all the applied forces and moments, and reactions, which act on the body(ies).

For the indeterminate frame subjected to the point loads shown, find the support reactions and draw the bending moment diagram for the frame. EI is the same for both the horizontal and vertical members. Primary structure is not unique – there are several choices. Calculate relevant deflections at points where redundants were removed.

Solve for the support forces on the entire frame (FBD) if possible. Draw a FBD of each member: Consider all two-force bodies first.

Oct 17, 2024 · In a rigid body FBD, you have to be precise about pointing the head of the force arrow to the location where it applied. For example. if we wanted to make a FBD of you and me high-5’ing, you would apply the force from your hand onto my hand, not at my center of mass.

Rigid frames are identified by the lack of pinned joints within the frame. The joints are rigid and resist rotation. They may be supported by pins or fixed supports. They are typically statically indeterminate. Frames are useful to resist lateral loads. and behave like beam-columns.

We should always begin by drawing the free body diagram (FBD). Knowing all the externally applied forces and moments, we can determine the reactions at the support by summing the forces and moments. From the FBD, we know that there is even distributed loading across the length of the top frame member.

In a rigid body FBD, you have to be precise about pointing the head of the force arrow to the location where it applied. For example. if we wanted to make a FBD of you and me high-5’ing, you would apply the force from your hand onto my hand, not at my center of mass.