船舶气囊下水过程结构应力变化的测试与分析  

Measurement and analysis of the stress change of the structure during the ship launching by using gasbag

作　　者：马剑[1] 钱少明[1] 胡夏夏[1] 

机构地区：[1]浙江工业大学之江学院,杭州310024

出　　处：《船舶工程》2008年第3期16-18,12,共4页Ship Engineering

基　　金：浙江省科技厅社会发展重大科技项目(2006C13094)

摘　　要：为研究船舶重力式气囊下水过程对船体结构应力的影响,采用动态应变仪对某21,500t散货船在下水过程中的船底及上甲板应力变化分别进行了测试,测试点布置在船中附近,设置同步信号进行采集;同时,用倾角仪对下水过程中船体纵向角度的变化进行了记录;测试结果表明:该船舶在气囊下水过程中,发生了艉落现象,船体局部出现应力较大区域.采取局部结构加强、延伸船台长度、改变船台坡度及船台改造成半潜等措施可以提高大吨位船舶气囊下水的安全性.In order to study the effect on the ship structure during the ship launching by using gasbag, the test has been carried out to investigate the stress change of upper deck and bilge near the midship of 21500 t bulk cargo ship using dynamic strain gauge. The test results were collected by setting in-phase signal and the change of longitudinal obliquity was memorized by goniometer at the same time. The test results indicate that stem＇s decline accident happened during the launching by using gasbag, the higher stresses were occurred in the part area of the ship. Measurements such as strengthening the part structures, extending the length of slipway under water, changing the grade of slipway, altering the slipway into the semi-submerged slipway should be taken to enhance the security during the high tonnage ship launching by using gasbag.

关 键 词：船舶 气囊 船舶下水 应力测试 应力分析 

分 类 号：U671.5[交通运输工程—船舶及航道工程]