Experiences From Structural Dynamic Analysis Projects of BWR Plants Within the Scope of Power Uprate Projects Using FEA

2010 ◽  
Author(s):  
Bjo¨rn Sva¨rd ◽  
Jan-Anders Larsson ◽  
Philip Ma˚rtensson ◽  
Bjo¨rn Lundin
Keyword(s):  
Finite Element Analysis ◽  
Dynamic Analysis ◽  
Structural Models ◽  
Dynamic Interactions ◽  
Element Analysis ◽  
Structural Dynamic ◽  
Global Models ◽  
Dynamic Verification ◽  
Strong Dynamic ◽  
Reactor Pressure

During recent years, power-uprate projects have been executed at several BWR-units in Sweden. As part of these projects, structural verification of the safety-related buildings as well as the new and old internal parts of the reactor pressure vessel, RPV, has been performed. In this document, some experiences will be presented from structural dynamic verification, using finite element analysis, FEA, within the scope of these power uprate projects. From this work, a number of conclusions can be drawn. Global models with dense meshes can successfully be used for a broad range of applications. Today, large FEA-models can be used efficiently, e.g. in global vibration and structural verification analyses, if suitable dynamic analysis methods are used. There can be strong dynamic interactions between the containment, fluids, the RPV and RPV-internals. Stress calculation and evaluation can be executed efficiently on large models. The structural models can with advantage be re-utilized in future projects.

Interfacing FEA and Multibody Simulation Through Component Mode Synthesis

2005 ◽  
Author(s):  
Hassan N. Bayoumi
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Dynamic Analysis ◽  
Multibody Systems ◽  
Simulation Software ◽  
Component Mode Synthesis ◽  
Multibody Simulation ◽  
Element Analysis ◽  
Structural Dynamic ◽  
Systems Software

Many of the currently available commercial multibody systems simulation packages are limited to rigid bodies linked by joints. Accurate dynamic analysis of multibody systems might require consideration of the flexibility of some components. Finite element analysis is generally the method of choice for structural dynamic analysis. Implementation of a fully featured reliable finite element capability within well-established commercial multibody systems software is not an easy task. A practical solution is to interface commercial finite element analysis software with commercial multibody systems software. This paper describes the theory and implementation aspects of such an interface. The interface is based on the Craig-Bampton method of component mode synthesis. The power of this technique is that it presents customers of commercial multibody simulation software with a practical and reliable tool to address component flexibility. The technique has been implemented to interface two major commercial simulation packages. Two practical applications, a flexible connecting rod and a flexible hard disk drive head-stack assembly, are discussed.

scholarly journals Vessel-Bridge Collision Reliability Assessment Based on Structural Dynamic Analysis

2021 ◽  
Vol 2021 ◽  
pp. 1-9
Author(s):  
Fu Tao ◽  
Ren Xiaoqian ◽  
Wang Kai
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Dynamic Analysis ◽  
Method Of Moments ◽  
Reliability Assessment ◽  
Impact Angle ◽  
Element Analysis ◽  
Structural Dynamic ◽  
Dynamic Finite Element ◽  
Dynamic Finite Element Analysis

Reliability analysis of vessel-bridge collision plays an important role in the construction of inland bridges. In this paper, a new method is proposed based on structural dynamic analysis. The random characteristics of three factors—impact angle, deadweight tonnage of vessels, and impact velocity—are considered. This method combines the method of moments with nonlinear dynamic finite element analysis, which can enhance the efficiency of calculating failure probability.

Interval Finite Element Analysis of Structural Dynamic Problems

2015 ◽  
Vol 8 (2) ◽  
pp. 382-389 ◽  
Author(s):  
Naijia Xiao ◽  
Rafi L. Muhanna ◽  
Francesco Fedele ◽  
Robert L. Mullen
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Dynamic Problems ◽  
Element Analysis ◽  
Structural Dynamic

Finite Element Analysis for the Welding Column of CNC Boring Machine

2014 ◽  
Vol 852 ◽  
pp. 447-451
Author(s):  
Yan Fang Yue ◽  
Zhi Bo Xin ◽  
Jin Ye Wang
Keyword(s):  
Finite Element Method ◽  
Finite Element Analysis ◽  
Finite Element ◽  
Dynamic Analysis ◽  
The Finite Element Method ◽  
Element Analysis ◽  
Construction Design ◽  
Inherent Frequency ◽  
Working Frequency ◽  
Loaded Column

The finite element method was applied in the construction design of the welding column of CNC boring machine for dynamic analysis and modal analysis. The laws of deformation and stress of a loaded column were obtained, and the natural frequency of each step and modes of column were also given according to this method. The results implied that the strength and the stiffness of welding column were met the machining requirements. Machine working frequency far less than inherent frequency, thus resonance is not easy to occur. Through the way, the optimization proposals of structure were given.

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