伞绳和伞衣处理成非线性弹性构件。
The radial members and gores are regarded as non linear elastic materials.
考虑伞衣中线上的子午向应力，得到了一个双轴应力模型。
The meridional stress in the gore centerline is considered, and a biaxial stress model is got.
利用模型计算了主充气阶段伞衣形状变化、伞衣投影面积变化及伞绳张力。
The model was used to calculate the variations of the canopy shape, the variations of canopy projection area and the tension of the suspension line during the final inflation phase.
接着介绍了伞系统的建模方法，重点讨论了主伞衣的模型和降落过程的实现。
Then, it introduces the modeling method of the parachute system, emphasizes the model of the main cloths and the realization of the landing process.
最后利用模型计算了初始充气阶段伞衣形状变化、伞衣投影面积变化及伞绳张力。
Finally, the model is used to calculate the variations of canopy shape, the variations of canopy projection area and the tension of suspension lines during initial inflation phase.
前体、伞绳及伞衣离散为一系列弹性连接的质量节点，伞衣内部流场为二维无粘、不可压流。
The forebody, suspension lines and canopy were modeled as a series of elastically connected mass nodes. The flow field inside the canopy was two-dimensional inviscid, incompressible flow.
建立的尾流再附动力学模型包括：伞系统运动方程、尾流运动方程、伞衣-尾流动量交换方程。
The model includes three parts: equations of the motion for the parachute-store system, equations of the motion for the wake, equations of the momentum transfer between parachute and wake.
将充满的伞看成柔软的壳体，用力学原理建立伞绳(伞衣上径向加强带)和伞衣幅中线的力平衡方程。
The canopy under inflation is regarded as a soft shell, and the equilibrium equations in the radial member and gore centerline are established by mechanics theorems.
将充满的伞看成柔软的壳体，用力学原理建立伞绳(伞衣上径向加强带)和伞衣幅中线的力平衡方程。
The canopy under inflation is regarded as a soft shell, and the equilibrium equations in the radial member and gore centerline are established by mechanics theorems.
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