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提出了用迁移矩阵法分析长大舱口船弯扭耦合动力特性的理论和方法。将船体简化成全自由的非均匀断面薄壁梁,根据Timoshenko梁理论,考虑剪切、转动惯量和翘曲,导出了开口薄壁单元和闭口薄壁单元的场迁移矩阵,在不同梁段间,提出了一组合适的协调条件,建立了点迁移矩阵。计算了大舱口船和三根梁的动力特性,表明本文的理论可靠,其方法具有重要实用价值。
The theory and method for analyzing the dynamic characteristics of bending and torsion coupling of long-expansive hatches are presented using the mobility matrix method. The hull was simplified into a full-free, thin-walled beam with a non-uniform profile. According to the Timoshenko beam theory, considering the shear, moment of inertia and warpage, the field transition matrix of the open thin-walled element and the closed thin-walled element was derived. A set of suitable coordination conditions established a point migration matrix. The dynamic characteristics of the large hatch ship and three beams are calculated, which shows that the theory of this paper is reliable and its method has important practical value.