一种薄壁吸能结构的设计优化
蒋致禹; 顾敏童;赵永生
Design and Optimization of an Energy-absorbing Thin-walled Structure
JIANG Zhi-yu;GU Min-tong;ZHAO Yong-sheng
研究了一种薄壁结构在耐撞指标下的轴向冲击吸能特性。采用非线性有限元软件ABAQUS对结构的冲击过程进行仿真,并结合径向基函数法(RBF),根据耐撞性指标优化了这种吸能结构的截面,得到了较为理想的结构形式。数值结果表明采用该方法可以精确地确定优化参数,使结构比吸能(Es)得到明显提高。
This paper presents a crashworthiness design of the hexagonal thin-walled columns stiffened at two corners with circular tubes and dealt with triggers in the body. To formulate the complex crashworthiness design problem, radial basis function (RBF) has been utilized as the metamodels. In the optimization process, the specific energy absorption(Es) is set as the design object and maximum crushing force(Pm) is set as the design constraint. By ABAQUS’s FEM simulation and through nonlinear optimization, the ideal section profile parameters of different methodologies are compared and analyzed.An optimal section profile is finally found with high specific energy absorption (Es) of the structure. Parametric studies are also performed to investigate the influences of the design variables on the crash performance of this designed structure.
固体力学 / 截面优化 / 径向基函数法 / 薄壁结构 / 吸能 {{custom_keyword}} /
solid mechanics / profile optimization / RBF / thin-walled structure / energy absorption {{custom_keyword}} /
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