The analytical solution of 1st order cnoidal wave induced seepage force on the bottom of a circular cylinder resting on porous elastic seabed is presented in this paper. By using this solution, some results are given for several sets of wave parameter and compared with those obtained by using linear wave theory. In order to verify the theoretical results, model tests were done in the wave flume. Test results show that the theoretical results calculated by using cnoidal wave theory are quite close to the data measured in the tests, and those obtained by using linear wave theory give too small values compared with the test data.
In latest years, wave induced seepage force acting on structure gradually became researcher's interest subject. This is because seepage load is an important load in the design of coastal and offshore structures. But in shallow water zone close to seashore, wave appears obvious nonlinearity due to the effect of the water depth, thus wave character isn't suitable to be described by linear wave theory. In these zones, it can be expressed by cnoidal wave theory quite well. So far, cnoidal wave induced seepage force on the bottom of the circular cylinder has been studied little. Based on 1st order cnoidal wave theory, the nonlinear wave induced seepage force on the bottom of the circular cylinder is studied in this paper, and analytical solution of the seepage load on the bottom of the cylinder is also given here. In order to verify the theoretical results, model tests were done in the wave flume. The results obtained from the experiments agree with the results obtained by using cnoidal wave theory quite well. The results calculated by using linear wave theory is also given in this paper for comparison.