期刊文献+
共找到2篇文章
< 1 >
每页显示 20 50 100
Biomechanical and dynamic mechanism of locust take-off 被引量:7
1
作者 Dian-Sheng Chen Jun-Mao Yin +1 位作者 Ke-Wei Chen Zhen Li 《Acta Mechanica Sinica》 SCIE EI CAS CSCD 2014年第5期762-774,共13页
The biomimetic locust robot hopping vehicle has promising applications in planet exploration and reconnaissance. This paper explores the bionic dynamics model of locust jumping by using high-speed video and force anal... The biomimetic locust robot hopping vehicle has promising applications in planet exploration and reconnaissance. This paper explores the bionic dynamics model of locust jumping by using high-speed video and force analysis. This paper applies hybrid rigid-flexible mechanisms to bionic locust hopping and studies its dynamics with emphasis laid on the relationship between force and jumping performance. The hybrid rigid-flexible model is introduced in the analysis of locust mechanism to address the principles of dynamics that govern locust joints and mechanisms during energy storage and take-off. The dynamic response of the biomimetic mechanism is studied by considering the flexi- bility according to the locust jumping dynamics mechanism. A multi-rigid-body dynamics model of locust jumping is established and analyzed based on Lagrange method; elastic knee and tarsus mechanisms that were proposed in previous works are analyzed alongside the original bionic joint configurations and their machinery principles. This work offers primary theories for take-off dynamics and establishes a theoretical basis for future studies and engineering applications. 展开更多
关键词 Locust take-off- Dynamics hybrid rigid- flexible Hopping mechanism
下载PDF
刚柔混合输流管的流致振动稳定性研究
2
作者 刘明俊 张振久 +2 位作者 杨显清 吕建行 李月安 《机械强度》 CAS CSCD 北大核心 2023年第3期548-554,共7页
弹性管和刚性管串联而成的混合输流管是典型的刚柔耦合系统。基于Hamilton原理,建立了刚柔混合输流管的动力学模型,利用悬臂梁的模态函数对方程进行Galerkin离散,分析了混合管的流致振动稳定性问题,讨论了两管连接处转动弹簧的刚度、刚... 弹性管和刚性管串联而成的混合输流管是典型的刚柔耦合系统。基于Hamilton原理,建立了刚柔混合输流管的动力学模型,利用悬臂梁的模态函数对方程进行Galerkin离散,分析了混合管的流致振动稳定性问题,讨论了两管连接处转动弹簧的刚度、刚性管与弹性管的质量比和长度比对系统临界流速的影响。结果表明,刚性管长度比的增加能显著降低混合管的临界流速,并且主要发生2阶模态失稳。当刚度和质量比取某些值时,随着内流流速的增加,混合管可能出现“失稳(2阶模态)-稳定-再失稳(3阶模态)”的变化过程。此外,随着弹性管质量比的增加,还观察到了混合管由2阶模态过渡到4阶模态的失稳模式。 展开更多
关键词 刚柔混合输流管 流致振动 特征值 临界流速 失稳
下载PDF
上一页 1 下一页 到第
使用帮助 返回顶部