濟南伸縮蓬廠

　　由于膜資料自身沒有抗壓和抗彎剛度，抗剪強主芤很差，因而其剛度和穩定性需要靠膜曲面的曲率變化和其中預應力來進步。

　　Due to the membrane material itself no compressive and flexural stiffness, shear strength and be very poor, so its stiffness and stability depends on the membrane surface curvature changes and the prestress to progress.

　　對濟南遮陽蓬而言，任何時候不存在無應力狀況，因而膜曲面形狀終究有必要滿意在必定邊界條件、必定預應力條件下的力學平衡，并以此為基準進行荷載剖析和裁剪剖析。

　　In Ji'nan the awning, any time there is no non stress condition, so the membrane surface shape with all necessary mechanical equilibrium in a certain boundary conditions and must be satisfied under the prestress, and used as the basis for load analysis and cutting analysis.

　　現在膜構造找形剖析的辦法首要有動力松懈法、力密度法以及有限單元法等。濟南遮陽蓬思考的荷載通常是風載和雪載。

　　At present, the methods of membrane structure analysis include dynamic relaxation method, force density method and finite element method. The wind load and snow load are usually thought of in Ji'nan.

　　在荷載效果下膜資料的變形較大，且隨著形狀的改動，荷載散布也在改動，因而要準確核算構造的變形和應力要用幾許非線性的辦法進行。

　　Under the load effect, the deformation of the membrane material is large, and the load distribution is changed with the change of the shape, so it is necessary to use the nonlinear method to calculate the deformation and stress of the structure accurately.

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