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离散奇异卷积法结构分析 被引量:2
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作者 徐素明 王鑫伟 于殿君 《南京航空航天大学学报》 EI CAS CSCD 北大核心 2009年第6期704-708,共5页
离散奇异卷积法是近几年内提出的一种新型的、具有潜力的数值计算方法。目前该法已被成功地用于结构元件的力学分析。本文介绍了离散奇异卷积法的原理,尝试用该方法分析工程结构中常用的梁、矩形板结构的弯曲、自由振动性能,并将计算结... 离散奇异卷积法是近几年内提出的一种新型的、具有潜力的数值计算方法。目前该法已被成功地用于结构元件的力学分析。本文介绍了离散奇异卷积法的原理,尝试用该方法分析工程结构中常用的梁、矩形板结构的弯曲、自由振动性能,并将计算结果与解析法和微分求积法的所得结果进行比较。结果表明,离散奇异卷积法是一种简单、可靠的数值计算方法。 展开更多
关键词 离散奇异卷积法 微分求积 自由振动分析 矩形板
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EFFICIENT NUMERICAL METHOD FOR DYNAMIC ANALYSIS OF FLEXIBLE ROD HIT BY RIGID BALL 被引量:1
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作者 徐春铃 王鑫伟 《Transactions of Nanjing University of Aeronautics and Astronautics》 EI 2012年第4期338-344,共7页
Impact dynamics of flexible solids is important in engineering practice. Obtaining its dynamic response is a challenging task and usually achieved by numerical methods. The objectives of the study are twofold. Firstly... Impact dynamics of flexible solids is important in engineering practice. Obtaining its dynamic response is a challenging task and usually achieved by numerical methods. The objectives of the study are twofold. Firstly, the discrete singular convolution (DSC) is used for the first time to analyze the impact dynamics. Secondly, the efficiency of various numerical methods for dynamic analysis is explored via an example of a flexible rod hit by a rigid ball. Three numerical methods, including the conventional finite element (FE) method, the DSC algorithm, and the spectral finite element (SFE) method, and one proposed modeling strategy, the improved spectral finite element (ISFE) method, are involved. Numerical results are compared with the known analytical solutions to show their efficiency. It is demonstrated that the proposed ISFE modeling strategy with a proper length of con- ventional FE yields the most accurate contact stress among the four investigated models. It is also found that the DSC algorithm is an alternative method for collision problems. 展开更多
关键词 impact dynamics finite element method discrete singular convolution algorithm spectral finite ele- ment method
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