Tong Gao , Lei Tang  , Zhiguang Zhao  , Longlong Song  , Xueying Qiu  , Dihuan Wu , Guanghui Shi , Qianying Zhou , Dongliang Quan

DOI Number XXX-YYY-ZZZ

Conference Number HiSST 2018_2090907

Thermo-elastic structures play an important role in high-speed vehicles. Thermo-elastic problem is thus an important branch of structural topology optimization to meet the requirement of thermal loading structure design. In this work, the density method is adopted for topology optimization. The concept of thermal stress coefficient (TSC) defined as a function of the Young’s modulus, thermal expansion coefficient and Poisson’s ratio was introduced to connect the thermal stress loads to the design variables. RAMP (Rational Approximation of Material Properties) scheme, which has been demonstrated superior performance over the SIMP (Solid Isotropic Material with Penalization) scheme to avoid the undesirable parasitic effects, is adopted to parameterize material properties. A standard topology optimization of the global compliance minimization under the volume constraint is performed to obtain an optimized structural configuration. The sensitivity analysis is carried out and the topology optimization problem is solved by the ConLin (Convex Linearization) algorithm. A fin and a cabin of the high-speed vehicle are designed using the developed topology optimization technique. And then, the detailed CAD models of the structures are constructed and analysed. These applications indicate that the topology optimization technology has remarkable ability and provides a powerful tool to the engineering designers to achieve a good enough concept design within a short time.

In Categories: High-Speed Missions and Vehicles, HiSST 2018, Materials and Structures, Supersonic and Hypersonic Aircraft Design
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