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| 1 | 机械工程学科基础研究成果的重要载体——贺《机械工程学报》创刊60周年显示文摘《机械工程学报》(Journal of Mechanical Engineering,JME)和《Chinese Journal of Mechanical Engineering》(CJME)统称为《学报》,作为机械工程领域基础研究成果的有效载体,报道战略性、前瞻性和创新性基金项目研究成果,在引领机械工程领域前沿发展方向、鼓励基础理论创新、促进学科建设、发现和培养人才等方面发挥了重要的导向作用。据不完全统计,1987-2012年,《学报》共刊登国家自然科学基金委员会(National Natural Science Foundation of China,NSFC)机械工程学科(简称E05)资助项目论文3 446篇,占发表论文总数的33.63%,充分展示了NSFC资助下机械工程领域基础研究所取得的创新成果,加强了国内外学术交流。值此《学报》创刊60周年之际,对E05资助项目在《学报》发表论文情况进行统计,分析资助项目成果对人才培养、团队建设及学科发展的引领作用,并对资助项目较多的4个学科代码下的代表性成果进行介绍。谨以此文表示祝贺。 | 王国彪 赖一楠 宋建丽 黎明 | 2013 | 机械工程学报2013，49，19： | 3 |
| 2 | 随从力作用下悬臂裂纹梁的稳定性分析显示文摘基于Adomian修正分解法研究悬臂裂纹梁的稳定性,悬臂梁的自由端具有弹簧支承和轴向随从力。将梁的裂纹模拟为无质量的等效扭转弹簧。通过Adomian修正分解法可以把裂纹梁的特征微分方程转换成递归代数公式,利用边界条件和裂纹位置的连续性条件推导得到该裂纹梁的量纲一固有频率及相应的振形函数解析表达式。通过与前人的计算结果比较,验证了所提方法的有效性。讨论裂纹位置和深度对颤振或屈服失稳的临界随从力的影响。讨论不同失稳形式时裂纹梁支承的临界弹簧刚度。数值计算结果表明,当裂纹位于悬臂梁固定端附近时,对梁的固有频率影响最大。研究还表明裂纹的存在有可能提高梁的稳定性。 | 毛崎波 | 2014 | 机械工程学报2014，50，1： | 2 |
| 3 | Four-Beam Model for Vibration Analysis of a Cantilever Beam with an Embedded Horizontal Crack显示文摘As one of the main failure modes, embedded cracks occur in beam structures due to periodic loads. Hence it is useful to investigate the dynamic characteristics of a beam structure with an embedded crack for early crack detection and diagnosis. A new four-beam model with local flexibilities at crack tips is developed to investigate the transverse vibration of a cantilever beam with an embedded horizontal crack; two separate beam segments are used to model the crack region to allow opening of crack surfaces. Each beam segment is considered as an Euler-Bernoulli beam. The governing equations and the matching and boundary conditions of the four-beam model are derived using Hamilton's principle. The natural frequencies and mode shapes of the four-beam model are calculated using the transfer matrix method. The effects of the crack length, depth, and location on the first three natural frequencies and mode shapes of the cracked cantilever beam are investigated. A continuous wavelet transform method is used to analyze the mode shapes of the cracked cantilever beam. It is shown that sudden changes in spatial variations of the wavelet coefficients of the mode shapes can be used to identify the length and location of an embedded horizontal crack. The first three natural frequencies and mode shapes of a cantilever beam with an embedded crack from the finite element method and an experimental investigation are used to validate the proposed model. Local deformations in the vicinity of the crack tips can be described by the proposed four-beam model, which cannot be captured by previous methods. | LIU Jing ZHU Weidong CHARALAMBIDES Panos G SHAO Yimin XU Yongfeng WU Kai XIAO Huifang | 2016 | Chinese Journal of Mechanical Engineering2016，29，1： | 2 |
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