【摘要】 研究了充气压力的改变对充气梁变形性能的影响.考虑气梁的褶皱，通过数据拟合得到褶皱后惯性矩比与弯矩比的简化关系.同时，假设充气气体符合理想气体压力规律，对气梁结构的变形进行了理论推导，得到考虑充气梁内压影响的位移与弯矩的解析解.为验证理论的正确性，制作了一个长3.0m、直径0.3m的圆形充气梁，固定其一端从而形成悬臂梁结构.在不同长度、不同充气压力以及不同加载方式下进行了加载试验，得到位移与荷载曲线，同时还测得相应的内压数据.与本文的解析解进行对比，数据符合良好.结果表明，气梁的气压对充气梁结构性能有显著影响.加载方式对气梁位移影响较小，气梁位移与截面弯矩成函数关系.相同位移下，考虑内压时比不考虑内压情况下截面弯矩增加近28%.更多还原

【Abstract】 The influence of inflatable pressure on the deformation performance of inflatable beam is studied. Considering the wrinkle of inflatable beam, the simplified relationship between the inertia moment ratio and the bending moment ratio after the wrinkle is obtained by data fitting.At the same time, assuming that the air is in accordance with the ideal gas pressure law, the deformation of the inflatable beam structure is theoretically derived, and the analytical solution of the displacement and bending moment of the inflatable beam considering the influence of internal pressure is obtained. To verify the theory, a circular inflatable beam with a length of 3.0 m and a diameter of 0.3 m was made, and one end was fixed to form a cantilever beam structure. The loading tests were carried out under different beam lengths, different charging pressures and different loading modes, and the displacement and load curves were obtained, as well as the corresponding internal pressure data. Compared with the analytical solution in this paper, the data agree well. The results show that the internal pressure has a significant effect on the structural performance of the inflatable beam. The effect of loading mode on the inflatable beam displacement is small, and the inflatable beam displacement is a function of the bending moment of the section. With the same displacement, the section bending moment increases by nearly 28% when the internal pressure is considered.更多还原