Schematic drawing of a tensile membrane in fan shape

Quick answer：

A tensile membrane structure with a fan shape is a type of architectural design that utilizes a fabric membrane stretched over a curved framework. These structures are known for their aesthetic appeal and innovative design, often used for covering large open spaces, such as sports facilities, event centers, and recreational areas. The membrane is typically tensioned tightly across the frame to create a smooth, tensioned surface, which can be illuminated or decorated for added visual effect.