新颖波纹截面薄壁圆管的耐撞性

提出一种新颖的波纹薄壁圆形结构,采用数值对比分析方法,分析不同波纹截面形状对薄壁结构耐撞性的影响.结果表明:对于同一外截面形状的波纹,波纹内截面形状的变化使吸能相差10%;外截面是矩形的不同内截面波纹结构的吸能性要高于外截面是圆形的不同内截面波纹结构,其中,外截面为矩形,而内截面为圆形的波纹结构具有最优的吸能性,比外截面为圆形,内截面为矩形的波纹结构的吸能性提高34.5%;波长对薄壁结构的耐撞性也具有较大的影响,波长为7.8 mm的波纹管具有较好的耐撞性;与无波纹结构的圆管相比,外截面为矩形,内截面为圆形的波纹薄壁管在不影响吸能的情况下,可以使峰值力降低50.8%.

Crashworthiness of Novel Thin-Walled Circular Tube With Novel Corrugated Cross Section

A novel corrugated thin-walled structure was proposed, and the crashworthiness of the structure with different corrugated cross section were studied using numerical analysis method. The research results show that the corrugated structure with same outer cross section and different internal cross sections can change energy absorption rate by approximately 10%. Moreover, the energy absorption rates of corrugated structure with rectangular outer cross section and different internal cross sections are higher than that of round outer cross sections. Meantime, corrugated structures with rectangular outer cross section and round internal cross section have the most excellent energy absorption capacity, 34.5% higher than that of round outer cross section and rectangular internal cross section. In addition, the corrugated length has an important influence on crashworthiness of thin-walled structure, and corrugated length of 7.8 mm has better crashworthiness performance. Furthermore, compared to traditional thin-walled circular tubes, the tubes with the proposed corrugated structure reduce peak force by 50.8% if energy absorption is not influenced.