不同标准下外压筒体轻量化设计

Lightweight Design of External Pressure Cylinder under Different Standards

LNG运输半挂车根据GB 1589-2016《汽车、挂车及汽车列车外廓尺寸、轴荷及质量限值》的规定最大允许总质量不能超过40t,轻量化LNG运输车是今后市场发展方向之一。LNG运输车外筒体由于受外压作用,往往通过设置较多加强圈来防止其失稳。在材质、直径、壁厚、长度均相同条件下的外筒体,按GB/T150《压力容器》、JB 4732《钢制压力容器》、ASME B&P Code VIII-2等不同标准下进行失稳计算,同种规格角钢圈数量大不相同,按ASME B&P Code VIII-2标准计算得出的角钢圈数量最少,轻量化程度更高,更具有市场竞争力。

The maximum allowable total mass of LNG transport semi-trailer according to GB 1589 shall not exceed 40 tons,lightweight LNG Transport Vehicle is one of the future market development directions,In order to the external pressure,the outer cylinder of LNG transport vehicle often prevents its instability by setting more reinforcement rings.The outer cylinder with the same material,diameter,wall thickness and length,According to different standards such as GB/T 150,JB 4732 and ASME B&P Code VIII-2,the number of angle rings of the same specification is quite different.According to ASME B&P Code VIII-2 standard,the number of angle steel rings is the least,the degree of lightweight is higher,and the angle steel rings are more competitive in the market.