Hydroelastic responses of two adjacent large mat-like structures floating in waves are numerically simulated by developed modal analysis method. In the simulation, two large structures, one is rectangular-shaped with length of 300 meters and width of 60 meters,and the other is L-shaped assembled from three pieces of the rectangular-shaped structure, are considered to be elastic. Since draught of structures is relatively small, it is assumed as zero draught. After numerical investigation,it is found that relative motions between facing edges of the two structures are much smaller when the smaller rectangular-shaped structure is put to the lee-side of the larger L-shaped structure than those put to the weather side.%应用模态分析方法[1]数值模拟了两个相邻大型浮式箱形结构物在波浪上的水弹性运动响应.在数值模拟时,把结构物近似为弹性体.考虑到吃水相对比较小,计算时作为零吃水处理.文中的两个结构:一个是300米长、60米宽的矩形结构物,另一个则是由三个同样大小的矩形结构拼接而成的L形结构物.计算结果表明:如果把较小的矩形结构物放置在较大的L形结构物的下游,两个结构物相邻自由边之间的相对运动幅值远远小于放置在迎浪一侧时的幅值.
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