排序方式: 共有3条查询结果,搜索用时 62 毫秒
1
1.
Motohiko Murai Hiroshi Kagemoto Masataka Fujino 《Journal of Marine Science and Technology》1999,4(3):123-153
New numerical methods are presented for hydroelastic analyses of a very large floating structure (VLFS) of several kilometers
length and width. Several methods are presented that accelerate computation without an appreciable loss of accuracy. The accuracy
and efficiency of the proposed methods are validated through comparisons with other numerical results as well as with existing
experimental results. After confirming the effectiveness of the methods presented, various characteristics of the hydroelastic
behavior of VLFSs are examined, using the proposed methods as numerical tools.
Received for publication on Dec. 3, 1999; accepted on Dec. 15, 1999 相似文献
2.
Takuya Ohmori Masataka Fujino Hideaki Miyata 《Journal of Marine Science and Technology》1998,3(1):22-29
To estimate the maneuvering ability of a ship, an accurate estimation of the hydrodynamic forces and moment acting on the ship's hull is indispensable. For the purpose of developing a numerical method of computing the viscous flow field around a hull and evaluating its validity, the hydrodynamic pressure on the hull and the velocity field were measured. Two full ship models with different hull forms in the aft part were used for the experiment. From the results of pressure measurements, the distribution of hydrodynamic lateral forces was obtained. The simulation method is a numerical solution of the Navier-Stokes equation based on a finitevolume method and applied to the maneuvering motion. The measured and computed results agree qualitatively well, and the method is a valuable tool for estimating the maneuvering ability of a ship. The typical characteristics of the flow field in the steady turning condition are revealed by the numerical simulation, and the mechanism of the relations between hull form, flow field, and hydrodynamic forces are clarified.Translation and combination of articles that appeared in the Journal of the Society of Naval Architects of Japan, vols. 176, 177, 179 (1994–1996): The original article won the SNAJ prize, which is awarded annually to the best papers selected from the SNAJ Journal, JMST, or other quality journals in the field of naval architecture and ocean engineering.This work was conducted as part of the joint SR221 project supported by JSRA (Shipbuilding Research Association of Japan). The authors express their sincere gratitude to the persons concerned, and especially to M. Kanai, S. Eguchi, S. Usami, K. Tatsumi, and T. Kawamura. 相似文献
3.
A multilevel model was applied to the calculation of permanent current and density variation in Tokyo Bay, and the change
of the state of stratification and the accompanying current field was simulated. In the numerical simulation, the observed
field data such as wind conditions and atmospheric temperature were used as input to the calculation, and the results were
compared with the observed values of currents, salinity, and sea temperature. Comparison of simulation results and observed
data revealed that the numerical simulation could describe well the current and density field governed by wind under stratified
conditions. In particular, the long-term variations of the vertical structure of salinity and temperature from summer to autumn
could be predicted qualitatively, as could the long-term variations of the vertical structure of salinity and temperature
from summer to autumn. Additionally, the effects of boundary conditions on the results of numerical simulations were examined.
As a result, it was clarified that the simulation results of salinity stratification were strongly affected by the boundary
conditions such as river discharge and the vertical structure of salinity at the open boundary adjacent to the outer ocean. 相似文献
1