针对某机型飞机舷窗有机中空透明件的载荷特点,建立了用于计算中空透明件变形和应力的迭代算法和有限元模型,并通过试验验证了该算法和有限元模型的准确性。对多种规格有机中空透明件进行了计算,分析了变形和应力与舱外气压、有机玻璃板厚度、气体层厚度的关系。
The iterative algorithm and finite element model were built to investigate the deformation and stress of PMMA hollow trans- parency used in porthole according to the specific loading characteristics. The deformation obtained from proof tests and calculations were consistent with each other, which implied the accuracy of the algorithm and finite element model. Then the calculations were per- formed to deal with different pressure out of cabin, different thickness of PMMA panel, and different thickness of gas layer. The rela- tions of deformation (or stress) and pressure out of cabin, thickness of PMMA panel, thickness of gas layer were obtained and ana- lyzed.