Ship's hull gilder's structure calculation in the launching by the gasbags

According to the characteristic of the launching by gasbag establish the ship' s hull structure calculation model.Analyzing the mechanical character of the gasbag,combining to the energy conservation deduce the gasbag' s working height' s calculation formula which is suit for any gasbag,then calculate the gasbag's equivalent non-linear elastic coefficient k based on the H.Associating with the nonlinear formula of k,the balance formula which consist with the stiffness matrix,displacement matrix and the force matrix can be solved,so,the hull's bend stress can be calculated.Comparing the theoretical solve with the measured value to verify the solution of the FEM structure calculation model,looking forward to providing certain reference to the launching's structure calculation.