大型煤气柜优化设计方法

OPTIMIZATION DESIGN METHOD OF LARGE GAS CABINET

以某工程为背景,以通用有限元结构分析软件MIDAS/Gen为计算工具,建立大型煤气柜的仿真模型并进行分析和研究。结果表明：1）对于起围护作用的钢板而言,日照温差产生的应力起控制作用,而风荷载则传递到立柱及横向加劲肋上;2）计算围护结构受力时,日本规范的阵风系数比中国规范大7%~22%;3）日照温差产生的最大应力点位于加载区域同未加载区域交接的地方,风荷载的方向应与加载区域剖断线的方向相同;4）煤气柜内部气压对结构的自振频率有微弱影响,实际设计时可忽略。

Based on a project,simulation model of the large gas tank was analyzed and studied by using finite element structural analysis and design software MIDAS/Gen as a calculation tool.The results showed that：1）for the retaining effect of steel plates,stress controlled the production of sunshine temperature effect,and the wind load was transferred to the column and transverse stiffeners;2）for the force calculation of retaining structure,the gust factor of Japanese norms about 7%~22%larger than China specification;3）the maximum stress point generated by sunshine time and temperature difference was loaded with no regional loading area where the handover,wind load direction should be the same direction with the section break;4）the effect of internal pressure of gas cabinet on the natural vibration frequency of the structure has a weak effect,which could be neglected in the actual design.