Ferris Wheel: The Tension Structure of Spokes

A close-up, low-angle view of an 80-meter diameter Ferris wheel, focusing on the structural principle: the outer ring is a hoop made of multiple segments of steel pipe, and the center is a thick axle. The two are connected not by rigid beams but by dozens of thin steel cables—the cables can only withstand tension, not compression, so the entire wheel acts like an enlarged bicycle wheel, maintaining its shape through pre-tension. The steel cables are only 40mm in diameter, appearing as thin as lines against the sky. The cabins are suspended from the outer ring, naturally maintaining a horizontal position due to gravity. Backlit, the structure forms dark lines against a bright sky. Avoid: spokes drawn as thick steel beams, too few steel cables, cabins fixed to the outer ring unable to swing, shot from a distance making the structure unclear.

Translated from Chinese by AI.

一座直徑 80 公尺的摩天輪的近景仰視,重點在結構原理:外圈是一道由多段鋼管接成的環,中心是一個粗大的軸,兩者之間不是靠剛性的樑而是靠數十根細鋼索連接——鋼索只能受拉不能受壓,所以整個輪子像一個放大的腳踏車輪,靠預張力維持形狀。鋼索的直徑只有 40mm,在天空的背景下細如線。座艙懸掛在外環,以重力自然保持水平。逆光,結構成為深色的線,天空是亮的。避免:輪輻畫成粗大的鋼樑、鋼索數量過少、座艙固定在外環上不能擺動、拍成遠景看不出結構。