纵骨间距 meaning in English

spacing of longitudinals

These four ship ' s class societies all use two holds length finite element modal near the central section . they mesh the finite element modal mainly according to the distance of longitudinal frames , we call this fine mesh finite element modal . the elements in the modal are mainly shells and beams
这四家船级社相同之处是都采用了船舯附近的两舱段长的有限元计算模型，有限元模型单元的划分主要依据纵骨间距和肋距，即所谓的细网格模型，结构单元以板壳单元和梁元居多。