首页> 外文会议>ASME turbo expo: turbomachinery technical conference and exposition >NUMERICAL ASSESSMENT OF REDUCED ORDER MODELING TECHNIQUES FOR DYNAMIC ANALYSIS OF JOINTED STRUCTURES WITH CONTACT NONLINEARITIES
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NUMERICAL ASSESSMENT OF REDUCED ORDER MODELING TECHNIQUES FOR DYNAMIC ANALYSIS OF JOINTED STRUCTURES WITH CONTACT NONLINEARITIES

机译:接触非线性非线性结构动力分析的降阶建模技术数值评估

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This work presents an assessment of classical and state of the art reduced order modelling (ROM) techniques to enhance the computational efficiency for dynamic analysis of jointed structures with local contact nonlinearities. These ROM methods include classical free interface method (Rubin method, MacNeal method), fixed interface method (Craig-Bampton), Dual Craig-Bampton (DCB) method and also recently developed joint interface mode (JIM) and trial vector derivative (TVD) approaches. A finite element jointed beam model is considered as the test case taking into account two different setups: one with a linearized spring joint and the other with a nonlinear macro-slip contact friction joint. Using these ROM techniques, the accuracy of dynamic behaviors and their computational expense are compared separately. We also studied the effect of excitation levels, joint region size and number of modes on the performance of these ROM methods.
机译:该工作提出了对阶级阶阶建模(ROM)技术的经典和状态的评估,以提高具有局部接触非线性的关节结构动态分析的计算效率。这些ROM方法包括经典的自由界面方法(Rubin方法,Macneal方法),固定接口方法(CRAIG-BAMPTON),双CRAIG-BAMPTON(DCB)方法以及最近开发的联合接口模式(JIM)和试验载体衍生物(TVD)方法。有限元接合光束模型被认为是考虑到两个不同的设置:一个具有线性化弹簧接头的测试用例,另一个具有非线性宏观滑动接触摩擦接头。使用这些ROM技术,单独比较动态行为的准确性及其计算费用。我们还研究了激发水平,接合区域大小和模式的效果,对这些ROM方法的性能进行了影响。

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