DF 2021: Air Filled Membrane Structure Room Sprayed by Mechanical Arm.

In the group of pattern design, we explored the possibility of construct spray path with parametric approach. We started from digital pattern design, while the construction group fill the membrane room with air. After that, we do the on site verification and observation to develop the design. The air membrane would change shape due to the changing air pressure. Taking into account of the structural characteristics of spraying technology and aesthetics. Here are two final pattern for sphere and water drop air membranes. Using square and contour as basic units. We tested the curve tension with kangaroo simulation. After several iterations, we choose the final one with a gradient of wavy pattern. This design satisfies the requirements for the bottom tamping of the film-filled sprayed pavilion. In order to best support the sphere itself, we started spray from the bottom up, with the bottom a lot thicker than the upper part. The overlapping components can stabilize sphere and decrease the shape morphing in strong liquid spraying. This design can meet the requirements of the behavior of robotic arm. On the meantime, it gives an appropriate time and temperature to initiate a chemical reaction when spraying from bottom to top.