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针对推进系统薄壁壳体静子支承结构设计中支承载荷不稳定的问题,设计了一种具有自适应变刚度力学性能的支承结构,提取该结构主要特征参数建立单元体模型,并结合橡胶材料非线性本构模型进行有限元仿真,结果表明该结构能够在较大压缩量范围内保持载荷稳定。此外通过仿真对比分析获得了主要设计参数对其力学性能的影响规律,表明其变刚度拐点、平台载荷等均可以通过结构和材料参数进行优化。
Aiming at the instability of supporting load in the design of static bearing of thin-walled shell in propulsion system, a bearing structure with adaptive mechanical properties of variable stiffness was designed. The main characteristic parameters of the structure were extracted and the unit body model was established. The linear constitutive model is simulated by finite element method. The results show that the structure can maintain the load stability in a large range of compression. In addition, the influence of the main design parameters on the mechanical properties was obtained through simulation analysis. The results show that the inflection point of the stiffness and the platform load can be optimized by the structure and material parameters.