Tensile membrane structures are architectural structures that utilize lightweight, flexible materials such as ETFE (Ethylene Tetrafluoroethylene) or PTFE (Polytetrafluoroethylene) to form a self-supporting shell. The design of these structures involves calculating the optimal shape and tension distribution to achieve structural stability, aesthetic appeal, and functional requirements. Factors such as material properties, environmental conditions, and load considerations are crucial in the design process.