BV620LF可控震源平板挂钩结构分析及改进

Structure analysis and improvement of BV620LF vibroseis baseplate hook

BV620LF可控震源采用了KZ28AS可控震源的车架,除振动器的关键结构尺寸外,其余诸多结构的尺寸继承自KZ28AS可控震源。BV620LF震源在设计时增加了振动器平板及重锤的质量,但挂钩结构及尺寸未变,导致现有平板挂钩无法满足强度要求。随着BV620LF震源的逐步推广使用,平板挂钩变形问题日益突出。为了解决BV620LF震源平板挂钩的变形问题,减少挂钩更换频率,本文采用有限元方法对现有挂钩强度进行分析,找出其结构薄弱点,并在此基础上,重新对挂钩结构进行优化设计,最终得到一种新型挂钩结构。此种挂钩在不改变BV620LF震源其他结构的前提下,满足了强度要求。

The vibrator chassis of KZ28AS was used for the vibrator BV620LF. The parameters of BV620LF structure, except the shaker, inherit from vibroseis KZ28AS. The weight of reaction mass and baseplate was increased for the new design, but the size of the hook didn't change, which caused the hook strength cannot meet the requirement. With the vibrator BV620LF more and more widely used in the field productions, the problem of hook has become acute. In order to solve the deformation problem of hook and reduce replacement, the finite element method was used to analyze the strength of hook, which ensure the weak point of the hook. Base on the finite element method analysis, a new structure hook was proposed, which can meet the requirement without change any other structure.