TWO ENGINEERING APPROACHES TO HYDROELASTIC ANALYSIS OF SLENDER SHIPS
TWO ENGINEERING APPROACHES TO HYDROELASTIC ANALYSIS OF SLENDER SHIPS
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发表时间：
1990
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通讯作者：
Yujia Wu;J. Xia;S. Du
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作者：
Yujia Wu;J. Xia;S. Du
本文将纽曼提出的细长体统一理论推广到物体变形的情况。基于这种一般细长体方法，建立了一种新的波浪中船舶水弹性行为的线性理论，它考虑了沿着船长方向的水动力相互作用，并可预报整个频域的动力响应。还描述了动态模式细化方法。这种方法避免了结构的全尺寸有限元分析，并且允许以大大减少的计算工作量获得在规定的主体子结构中的位移和应力分布的细节。这种方法提供了一种有效的方法来预测结构的水弹性响应。文中以均匀梁、薄壁箱为例，给出了模态位移和模态应力的精确计算方法，并以3000 DWT远洋船舶为例，给出了甲板应力的精确计算方法。
The unified slender body theory presented by Newman is extended to admit of the distortion of the body. Based on this general slender body approach a new linear theory of hydroelastic behaviour of ships travelling in waves is formulated to allow for the hydrodynamic interaction along the ship length and the predictions of the dynamic responses over whole frequency domain. A dynamic mode refinement approach is also described. This approach avoids the full size finite element analysis of the structure, and allows the detail of the displacement and stress distributions in a prescribed substructure of the body to be obtained with greatly reduced computational effort. This approach provides an efficient way of predicting the hydroelastic responses of the structure. The applications of this approach are illustrated with reference to a uniform beam, a thin wall box for obtaining the refined modal displacements and modal stresses, and a 3000 DWT oceangoing ship travelling in irregular waves for predicting the stress in the deck.