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螺栓连接广泛应用于航空发动机结构中,对航空发动机动力特性有重要影响.薄层单元法能够很好地模拟复杂连接结构并保持结构完整性.以薄层单元法为基础,给出航空发动机螺栓连接结构薄层单元法参数化建模原理,研究薄层单元材料参数对螺栓连接刚度的影响规律,并从理论推导出发确定薄层单元相关材料参数,最后将该方法应用到实际结构中,并与精细有限元模型结果对比,从而验证薄层单元法的正确性和应用前景.研究结果表明:薄层单元法能够很好地模拟航空发动机螺栓连接结构;对轴向、弯曲刚度起决定作用的是薄层单元轴向弹性模量,对剪切刚度起决定作用的是薄层单元xy、xz平面的剪切模量;薄层单元材料参数能够用螺栓连接结构参数示出.
Bolted connections are widely used in the structure of aeroengines and have an important impact on the dynamic characteristics of aeroengines. The thin-layer element method can well simulate the complicated connection structure and maintain the structural integrity. Based on the thin-layer element method, The principle of parametric modeling of the thin-layer element method of the connection structure is used to study the influence law of the material parameters of the thin-layer element on the rigidity of the bolted joint. From the theoretical deduction, the material parameters of the thin-layer element are determined. Finally, the method is applied to the actual structure. Compared with the results of the finite element model, the correctness and the application prospect of the thin-layer element method are verified.The results show that the thin-layer element method can well simulate the connection structure of the aero-engine bolt, and plays a decisive role in the axial and flexural rigidity Is the axial elastic modulus of the thin-layer element, which plays a decisive role in the shear stiffness of the shear modulus of the xy, xz plane of the thin-layer element; the material parameters of the thin-layer element can be shown with bolted structural parameters.