不同类型近破波作用下沉箱式防波堤动力响应分析  

Dynamic Analysis of Caisson Breakwater under Various Breaking Wave Impact Forces

作　　者：王元战[1] 周云亮[1] 华蕾娜[1] 

机构地区：[1]天津大学建筑工程学院港口工程系,天津300072

出　　处：《中国港湾建设》2004年第3期1-4,共4页China Harbour Engineering

基　　金：国家自然科学基金资助项目(批准号:50279027)

摘　　要：采用质量-弹簧-阻尼器集总参数模型模拟防波堤-地基动力系统,对不同类型近破波作用下沉箱式防波堤的动力响应特性进行分析,研究、比较了单峰值冲击型近破波冲击力持续时间、双峰值冲击型近破两波峰值间隔、冲击-振荡衰减型近破波振荡周期等对沉箱式防波堤动力响应特性的影响。结果表明,在近破波冲击力幅值相同的条件下,不同类型近破波作用下沉箱的动力响应有很大差别,单峰值近破波冲击作用下沉箱的动力响应要小于双峰值近破波和冲击-振荡衰减型近破波冲击作用下的情况。The mass-spring-damper model of caisson-base system is used to analyze the dynamic responses of caisson breakwater under various breaking wave impact forces. The effects of the duration of the single peak impact, the interval of the double peak impact, and the oscillation period of the shock-damping oscillation impact on dynamic response behaviors of caisson breakwater are investigated. It is shown that the dynamic responses of the caisson are significantly difference under different types of breaking wave impact forces even in case the amplitudes of impact forces are equal, and the dynamic response amplitude of the caisson are lower under the single peak impact excitation than that under the double peak impact and the shock-damping oscillation impact excitation.

关 键 词：防波堤 近破波 冲击力类型 动力响应 

分 类 号：U656.101[交通运输工程—港口、海岸及近海工程]