Polyurethane membranes modified with silk fibroin protein(SF) and silk fibroin peptide(SP) had good flexibility. They could overcome rigid and brittle weaks of SF membrane.
用丝素蛋白或丝素肽表面改性的聚氨酯膜表现出良好的柔韧性，它能够克服丝素膜刚而脆的弱点；
2
Taking an open membrane roof, which covers the central square of Great Shanghai Pedestrian Street in Zhengzhou City, as an example, a wind tunnel test on a rigid model was carried out.
以郑州大上海步行街中心广场膜结构屋盖为工程背景，进行了刚性模型的同步测压试验。
3
Tensioned membrane structures is made of soft fabric and clenched by flexible cables or rigid supports to produce stiffness and cover a large space.