摘要
海洋潮差浪溅区结构物不仅存在海水环境物理化学生物因素引起的腐蚀问题,还存在海面风浪力周期作用引起的腐蚀疲劳问题.本文分析了海洋潮差浪溅区风浪力作用于构筑物的产生附加载荷变化,计算了作用于结构物桩柱的平均波浪力、最大波浪力及作用力的周期性等附加应力载荷谱特征,分析了水深、桩柱直径和波浪高度对波浪冲击力的影响.结果表明,波浪因素对附加应力载荷谱具有较大的影响;作用于小直径桩柱波浪力呈正弦周期性变化,其周期和入射波周期一致,且周期最大作用力与波高,圆柱直径,水深有密切关系;我国海区沿岸的应力载荷具有明显的季节性变化.这些工作为典型海域构筑物腐蚀疲劳波浪力附加载荷谱的建立和应用提供了方法和依据.
For the offshore engineering structures in tidal and splash zone of ocean,it is not only suffered from corrosion caused by seawater but also suffered from corrosion fatigue,which may be enhanced by wave force.It was studied in this paper that the additional load spectra on offshore engineering structures caused by wave force,including average wave force,maximum wave force,its periodicity as well as the effect of water depth,of dimension of the structure and of wave height on the wave force spectra.The analysis results indicated that the period and height of wave have great influence on the additional load spectra;the wave force varied in the same sinusoidal form with the wave;and the maximum wave force was related to wave height,structure diameter and water depth.The additional load spectra on offshore structures along coastal of China sea varied with season and location.This work provided a basis to estimate the additional load spectra of wave force which was surely expected to enhance the corrosion fatigue of offshore engineering structures in oceans.
出处
《腐蚀科学与防护技术》
CAS
CSCD
北大核心
2010年第4期289-293,共5页
Corrosion Science and Protection Technology
基金
国家自然科学基金资助项目(50971118)
国家科技支撑计划项目(2007BAB27B05)资助
