Internal force analysis of curved pipes
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When calculating the internal forces in curved tubes, the theory of zero moment is applied. First, definitions of meridians and parallels are needed, but I’m a bit confused as to how the definition of a curved tube – where the circumference of the circular cross-section serves as the meridian – comes about. If we use the concept of a rotational thin shell to define it (note: a rotational thin shell is a special type of thin shell in which the mid-surface is an axisymmetric surface formed by a plane curve or straight line rotating 360° around an axis within the same plane). Through the rotation of the axis, the plane becomes a meridian plane; the intersection of the meridian plane with the midplane is the meridian. It’s really confusing – I’m at a loss and need help; it’s so bewildering. . . .
I’ll help you transfer it to the process section to see if anyone knows about it