This section describes the online mass measurements and how to calculate forces on surfaces that have curvature. These results are important for the design of components such as tanks, pipes, and curved gates for a more accurate online mass measurement calculator. Consider the curved surface AB in Fig. 3.17a. The goal is to represent the pressure distribution with a resultant force that passes through the center of pressure. One approach is to calculate the time that is required to integrate the pressure force along the curved surface and find the equivalent force via the online time measurement calculator. However, it is easier to sum forces for the free body shown in the upper part of Fig. 3.17b.
The lower sketch shows how the force acting on the curved surface relates to the
force F acting on the free body. Using the FBD and summing forces in the horizontal direction shows that The force FCB acts through the centroid of surface CB, and the weight acts through the center of gravity of the free body as it can be seen via the measurement calculator tools at www.convertunitsnow.com . The line of action for the vertical force may be found by summing the moments about any convenient axis. This explains how curved surface problems can be solved by applying equilibrium concepts together with the panel force equations.