SESAM (Super Element Structure Analysis Module)是由挪威船级社(DNV-GL)开发的一款有限元分析(FEA)系统,它以 GeniE、HydroD 和 DeepC 等模块为核心,主要用于海工结构的强度评估、波浪荷载计算和系泊系统分析等。GeniE、HydroD 和 DeepC 分别是 Sesam 系统的固定式结构分析模块、漂浮式结构分析模块和系泊系统分析模块。HydroD is the software package for robust hydrodynamic analysis and stability analysis.
在 HydroD 中,多体模型(Muti-body)用于频域多体分析,即求解由刚度或阻尼耦合矩阵相连接的多刚体的频域势流问题。多体分析是由 Wadam 执行的,Wadam(Wave Analysis by Diffraction and Morison Theory)是 SESAM 系统中用于计算无航速浮体频域水动力的程序。
一个多体模型是基于已存在的水力模型(Hydro Model)创建的,它由 Hydro Model、Loading Condition(加载条件)、X-Traslation、Y-Traslation、Z-Rotation、Type 和 Damp 等参数确定。X-Traslation、Y-Traslation 和 Z-Rotation 用来平移和旋转所引用的水力模型,以确定其在多体模型中的位置。Damp 是阻尼系数,它确定了阻尼力的大小,通常在 0.005 ~ 0.1 内取值。
The bodies must be added in the order of floating bodies, fixed bodies, damping surfaces and internal lids. The description of a multi-body analysis in the user manual for Wadam describes three coordinate systems, the input system, the body system and the global system. When running from HydroD, the body system is positioned in the water line at the horizontal position of the model. The results from the multi-body models are reported separately, in the body system for each model.
编号 | 名称 | 含义 |
---|---|---|
01 | Regular Body | Regular body is a regular fixed or floating structure. |
02 | Internal Lid | Internal lid is a lid on the internal waterplane area, which will remove the irregular frequencies. |
03 | Damping Surface | Damping surface is a part of free surface where a damping term is applied to the boundary condition. |
[1]. HydroD User Manual.
[2]. HydroD/Tutorials Stability analysis and code checking.
[3]. HydroD/Tutorials Wadam, Wasim and Meshing tools.
[4]. 关于风机 叶片/荷载/控制 方面的介绍请访问:https://www.zhihu.com/column/c_1485646874003058688
[5]. 关于风机 有限元分析 方面的介绍请访问:https://blog.csdn.net/shengyutou
[6]. 联系作者 ,Email: liyang@alu.hit.edu.cn
[7]. 联系作者 ,WeChat/Weixin: 761358045