VB.NET和NASTRAN混合编程在船体梁振动计算中的应用

摘要

A hull girder vibration calculation software applied to the initial design stage was developed by VB.NET and NASTRAN mixed programming approach based on Visual Studio.NET platform.It's convenient for user to input and select the relevant control parameters in the graphical user interface.The functions include hull girder vertical vibration empirical formula estimate, added mass calculation, one-dimensional beam finite element model parameter modeling, hull girder vertical and horizontal vibration calculation using NASTRAN, natural frequency and modal shape automatically extract.A 35 000 m3 LEG carrier was taken as the research object, the calculated values using the software were compared with the ones of empirical formula method and global finite element analysis method, indicating that the software is reliable and applicable for the low order hull girder vibration analysis.%以Visual Studio.NET为开发平台,基于VB.NET和NASTRAN采用混合编程的方法开发适用于方案设计阶段的船体梁振动计算软件.通过图形化用户界面控制参数的选择和输入实现船体梁垂向振动经验估算、附连水质量计算、一维梁有限元模型的参数化建模、后台调用NASTRAN计算船体梁垂向和水平振动,以及固有频率和模态振型自动提取等功能.以35 000 m3液化乙烯运输船为例,对比软件计算值与经验估算值和整船三维有限元分析值,结果表明,该软件对于低阶船体梁振动计算具有良好的可靠性和实用性.