基于Rayleigh-Ritz法的载人潜水器观察窗位移与应力分析(英文)

Displacement and Stress Analysis of Viewport Used in Human Occupied Vehicle Based on Rayleigh-Ritz

为了全面地描述整个观察窗上的位移和应力分布,基于Rayleigh-Ritz位移变分法提出了观察窗的位移和应力的理论计算模型,并以锥台形观察窗为例,得到自由边界和固定边界条件下的位移分量表达式。为了验证理论模型的有效性,对蛟龙号载人潜水器主观察窗在两种边界条件下由有限元法和Rayleigh-Ritz法计算的位移和应力结果进行了对比,结果表明:Rayleigh-Ritz法计算的位移与应力分量的结果与有限元法计算结果吻合较好。较传统的应力计算方法而言,基于Rayleigh-Ritz法提出的理论模型更适用于描述整个观察窗上的位移和应力分布。

In order to find out the distribution of displacement and stress on the whole viewport used in Human Occupied Vehicle （HOV）, a theoretical model based on Rayleigh-Ritz displacement varia- tion method is proposed. The displacement of conical viewport is derived under free and fixed bound- ary conditions. The main viewport used in JIAOLONG HOV is demonstrated to verify the model ac- curacy, comparing with Finite Element Method （FEM）. The displacement and stress components of the proposed model are similar to those using FEM. The results show that the theoretical model based on Rayleigh-Ritz method is an effective way to calculate the displacement and stress of the whole viewport, which is more suitable than the conventional method.