为拓宽非线性能量阱(nonlinear energy sink,NES)的频率变化范围,基于负刚度原理,通过预压弹簧构造负刚度系统,设计水平向的负刚度NES减震器。利用ABAQUS有限元软件对负刚度NES减震器进行数值模拟,在导杆无摩擦且弹簧不发生侧向屈曲的...
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为拓宽非线性能量阱(nonlinear energy sink,NES)的频率变化范围,基于负刚度原理,通过预压弹簧构造负刚度系统,设计水平向的负刚度NES减震器。利用ABAQUS有限元软件对负刚度NES减震器进行数值模拟,在导杆无摩擦且弹簧不发生侧向屈曲的状态下,分析弹簧行程长宽比、预压缩量、刚度和阻尼比对负刚度NES减震器抗震性能的影响。研究结果表明:在固定弹簧行程长宽比的条件下,增加弹簧的预压缩量,可提高减震器的抗震性能;在固定弹簧预压缩量的条件下,随着弹簧行程长宽比的增大,减震器的承载力逐渐减小,抗震性能下降;弹簧刚度和阻尼比的增加可显著增大减震器的承载力,提高抗震性能。研究结果为负刚度NES减震器的工程应用提供参考。
以桥梁与隧道专业硕士研究生为例,探讨了科教融合研究生实践能力和创新人才培养的模式,提出课程体系、教学设计、教学方法、教学资源、教学拓展要素改革是桥梁与隧道专业硕士研究生创新人才全过程培养的必要条件。指出科教融合可以培养研究生理论与实践相结合的创新能力、积累实践经验、培养研究生团队合作精神,而且实习基地作为教育与产业结合的重要桥梁,对于培养符合社会需求的研究生创新人才具有至关重要的作用。Using master’s degree students specializing in bridge and tunnel engineering as a case study, this paper examines the approach to developing practical skills and innovative capabilities among graduate students through the integration of scientific knowledge and educational practices. It posits that reforms in the curriculum structure, instructional design, pedagogical methods, educational resources, and the incorporation of experiential learning elements are essential for the comprehensive development of innovative talents among master’s students in this field. The study highlights that the integration of science and education fosters postgraduates’ ability to synthesize theoretical knowledge with practical application, enhances their practical experience, and nurtures their collaborative spirit. Furthermore, it emphasizes the significance of internship programs as a crucial link between academia and industry, which is instrumental in cultivating innovative talents that align with societal needs.
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