定量模拟分析船体与空气枪间的安全距离  

Quantitative simulation analysis on the safe distance between the hull and the air-guns

作　　者：王立明[1,2] 胡毅[1] 许江[1] 刘保华[3] 

机构地区：[1]国家海洋局第三海洋研究所海洋与海岸地质实验室,福建厦门361005 [2]长安大学,陕西西安710064 [3]国家海洋局国家深海基地管理中心,山东青岛266061

出　　处：《应用海洋学学报》2016年第4期575-578,共4页Journal of Applied Oceanography

基　　金：国家自然科学青年基金资助项目(41204100);福建省自然科学基金资助项目(2013J05059);国家海洋局青年海洋科学基金资助项目(2013338);国家海洋局第三海洋研究所基本科研业务专项资助项目(海三科2011026);南北极环境综合考察与评估专项资助项目(CHINARE2016-03-03;CHINARE2016-04-03;CHINARE2016-01-03;CHINARE2016-04-01)

摘　　要：海洋地震勘探过程中,水中放置的空气枪与船体之间须保持一定安全距离,否则引起船载设施和仪器剧烈抖动,影响船舶设施和仪器的安全运行,甚至更严重情况下,有可能造成船体的损坏.利用海水压力脉冲与船体受到的冲击压力关系,结合建立的空气枪震源子波模型模拟近场震源子波,可计算出船体与空气枪间的安全距离.研究结果表明,根据震源子波模型模拟的近场子波主峰值,总容量150in3G枪、300 in3相干G枪及760 in3相干G枪的安全距离分别为3.90、6.57 m和9.13 m.由此可知,空气枪与船体间距离只有大于安全距离,才能避免船体大的振动或设备免遭损害,保证海洋地震勘探有效、安全的进行.During marine seismic exploration process,the position of air-guns in water must keep a safe distance with the hull. Without doing so,air-gun source will cause shipboard facilities and equipment severely shaking,which affects the safe operation of ship. Even worse,it may cause damage to the hull. With consideration of the relationship between seawater pressure pulse and the impact pressure towards the ship and combination of the air-gun source wavelet model which stimulates the near-field source wavelet,the safe distance between the hull and the airguns can be calculated. Research results show that the safe distance of total capacity 150 in^3 G gun,300 in^3 coherent G guns and 760 in^3 coherent G guns are 3. 90 m,6. 57 m and 9. 13 m,respectively,according to peak value of near-field wavelet simulated by air-gun source wavelet model. It can be known that the distance between the place of air-guns and the hull should be greater than a safe distance in order to avoid large vibration of the hull or equipment from damage and to ensure effective and safe marine seismic exploration.

关 键 词：海洋地质学 空气枪 安全距离 子波模型 近场震源子波 

分 类 号：P736[天文地球—海洋地质]