碳纤维等级对迫击炮复合身管多目标优化设计的影响

Influence of Carbon Fiber Types on Multi-Objective Optimum Design of Mortar Composite Barrel

将高性能碳纤维用作迫击炮身管外部增强层,可大大降低身管质量。在湿法缠绕工艺中,针对缠绕张力对金属内衬的强化效应,基于正交各向异性材料的厚壁圆筒理论和基于小变形假设的弹性叠加理论,提出了适用于多角度分层缠绕的内衬预应力离散叠加算法。针对复合身管中受内压的薄壁内衬碳纤维缠绕圆筒典型结构,以复合身管质量和抗弯刚度为优化目标,提出了基于多岛遗传算法的复合身管多目标优化设计方法。通过不同材料搭配方案的Pareto解集对比表明,M46方案相比T300和T700方案质量更轻、刚度更高,其中Ni_2/M46方案优化效果最好,说明高模量碳纤维更具轻量化优势,并通过有限元仿真和水压试验验证了优化结果的有效性。

The application of high performance carbon fiber as the mortar barrel external enhancement layers can greatly reduce the mass of barrel made by pure metal.During the wet-winding process of composite barrel,the winding tension of carbon fiber will enhance the metal liner performance greatly with an internal loading pressure.A discrete superposition algorithm of liner prestress,which coated by a multi-angle layered winding carbon fiber layers,was proposed,based on thick-cylinder theory with the orthotropic mechanics and elastic superposition theory with the small deformation assumption.For the typical structure of filament winding cylinder with thin wall liner in composite barrel,a multi-objective optimization design method was proposed.The optimization targets are the strength and bending stiffness of composite barrel.The Pareto solution sets of different materials collocation schemes show that the M46schemes are more light and rigid than T300and T700schemes,indicating that carbon fibers with high modulus has more lightweight advantages,and the Ni2/M46scheme is more light and rigid than all other schemes.The validity of the optimization results is verified by the finite element simulation and the hydraulic pressure test.