风浪成长关系的分析及其对3/2指数律的支持

系统地分析比较了迄今根据观测已提出的一些风浪成长关系。通过研究发现 :这些风浪成长关系式存在较大的不协调性。然而 ,当消去无因次风区后 ,由这些关系式得到的无因次波高与无因次周期关系却与 3/ 2指数律有着非常好的协调一致性。还分析 Wen etal构造出的代表平均状况的风浪成长关系。发现由这一风浪成长关系得到的无因次波高与无因次周期关系是与平均状况的 3/ 2指数律完全一致的。上述风浪成长关系构成对 3/ 2指数律的观测支持 ,从而说明了 3/ 2指数律的普遍性。并提出这些风浪成长关系间不协调性的一个可能解释

Analysis of Wind Wave Growth Relations and Their Support to the 3/2 Power Law

Several wind wave growth relations (WWGR), which a re presented on the basis of field and laboratory measurements, are systematically analyzed and compared. It is found that significant discrepancies exist in thes e relations while the relationships between dimensionless wave height and period deduced from these relations by eliminating dimensionless fetch are fairly cons istent with those obtained from the 3/2 power law proposed by Toba. A mean WWGR is also analyzed, which is constructed by Wen et al. on the basis of 5 WWGRs of representative and authoritative domestically and abroad. It is also found that the relationship between dimensionless wave height and period deduced from the m ean WWGR is completely consistent with those obtained from the 3/2 power law, co rresponding to the mean status. It is concluded that the 3/2 power law is suppor ted experimentally by these WWGRs and its universality is manifested to a great extent. A probable explanation to the discrepancies among these WWGRs is given.