中国古代的飞行器械

 记述古代中国人不仅进行了滑翔飞行的尝试，或乘风筝飞行，而且还发明了许多与飞行相关的器 械或器物，如木鸢、竹蜻蜓、风筝、热气球、降落伞等. 还有指南针和万向支架(即陀螺仪 的雏形，古代称其为``被中香炉')的发现，也对早期航空发展起过一定作用.     

昆虫是怎样飞行的

简述昆虫翅的拍动运动及昆虫飞行的控制方式, 介绍昆虫飞行的空气动力学原理和人们对这些原理的认识过程.     

近代力学在中国的传播与发展——————评介武际可教授的力学史新作

 评论介绍武际可教授2005年出版的力学史新作《近 代力学在中国的传播与发展》.     

1920年以前力学发展史上的100篇重要文献

列举了1920年以前力学发展史中的100篇重要文献.     

一代宗师 风范长存——————记我国第一代工程力学教授罗忠忱

 记述我国第一代工程力学教授 罗忠忱先生致力于引进西方先进的工程教育思想, 按照美国工科大学的模式进行 工程力学教学的事迹. 介绍了罗教授热爱祖国、热爱唐山交大, 把毕生精力奉 献给力学教育, 培养了几代高水平的工程师的业绩, 以及他为唐山交大树立优良 的学风作出的卓越贡献.     

力学史与方法论研究应当肩负的重任

提出力学史与方法论研究和教学中应当关注的3个问题: 力学学科的性质问 题、发掘搜集和整理我国的力学学科的历史资料问题和力学史需要放眼世界的问题.     

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 科学发展的历史极富人文性. 力学丰厚的文化内涵决定着力学史中蕴含有丰富的人文素质教 育素材,从培育好奇与探索精神;树立科学的哲学理念;追求``真、善、美'; 培养怀疑意 识、批判与创新精神;弘扬实事求是的态度;掌握科学思想与方法;展示人格魅力培养社会 责任感,从7个方面论述了力学史的人文素质教育功能.     

漫话涂布流动

 介绍流体力学在感光材料工业涂布技术中的应用.     

中国古代计量弓力的方法及相关经验认识

通过对现存传统弓箭制作工艺的调查,在对弓匠认识和解决具体的实践力学知识方法的考察基础之上,从对物理知识历史认识论的视角,对中国传统弓箭制作及使用中的实践力学知识进行了系统研究. 总结了中国古代计量弓力的单位和测试弓力的方法,分析了中国古代对弓体力学性能的认识. 并对前人争论的``郑玄发现弹性定律'的观点,从解读郑玄注文的含义、测试和解析弓体的力学性能、调查弓匠们的经验认识等多方面进行讨论,指出以前的研究者对这个问题的认识是错误的.     

从欹器谈起:关于理论力学中的素质教育问题

由欹器的设计与制作讨论素质教育的几个因素,以及欹器在理论力学课堂教学中的具体应用。     

欹器的原理及设计

介绍中国古代的欹（ji）器．提出欹器有3种可能的形式,并详细介绍了其中一种原理及设计,最后对3种“欹器”的可能性进行了推测．     

Dynamic flight stability of a bumblebee in forward flight

The longitudinal dynamic flight stability of a bumblebee in forward flight is studied. The method of computational fluid dynamics is used to compute the aerodynamic derivatives and the techniques of eigenvalue and eigenvector analysis are employed for solving the equations of motion. The primary findings are as the following. The forward flight of the bumblebee is not dynamically stable due to the existence of one （or two） unstable or approximately neutrally stable natural modes of motion. At hovering to medium flight speed [flight speed Ue = （0-3.5）m s^-1; advance ratio J = 0-0.44], the flight is weakly unstable or approximately neutrally stable; at high speed （Ue = 4.5 m s^-1; J = 0.57）, the flight becomes strongly unstable （initial disturbance double its value in only 3.5 wingbeats）.     

Dynamic flight stability of a model dronefly in vertical flight

The dynamic flight stability of a model dronefly in hovering and upward flight is studied.The method of computational fluid dynamics is used to compute the stability derivatives and the techniques of eigenvalue and eigenvector used to solve the equations of motion.The major finding is as following.Hovering flight of the model dronefly is unstable because of the existence of an unstable longitudinal and an unstable lateral natural mode of motion.Upward flight of the insect is also unstable,and the instability increases as the upward flight speed increases.Inertial force generated by the upward flight velocity coupled with the disturbance in pitching angular velocity is responsible for the enhancement of the instability.     

人类飞起来前后--力学史杂谈之十五

简要地叙述了莱特兄弟发明飞机之前，前人对飞行的研究，并且介绍了莱特发明飞机和力学学科的关系，还介绍了围绕飞机发明权的诉讼。     

The centenary of powered flight: The next 100 years

Experimental Techniques -     

The reinforcement of ancient timber-joints with carbon nano-composites

The paper describes an experimental research activity on the application of a polymeric resin reinforced with carbon nanotubes on an ancient timber structures belonging to cultural heritage (Bertolini Cestari et al. in Proc. of SAHC2008. VI International Conference, pp. 941–947, 2008; Marzi in Ph.D. Thesis, 2010; Bertolini Cestari et al. in Proc. of ICRACM-2010—3rd International Conference on Recent Advances in Composite Materials, 2011). The proposed approach aims at the conservation of a specific wooden joint belonging to traditional constructions. Therefore the research was addressed to the definition and assessment of a methodology of preparation and application of the nano-composite with the aim of verifying an increased mechanical resistance in comparison with traditional reinforcement methods. Different wood species have been considered and the experimentation has been carried out in view of a possible in-situ application of the technique. Laboratory tests were carried out at first on small wooden samples, and afterwards on wooden elements having real dimension. These last ones were taken from ancient and decayed wooden floors belonging to an important historical building that were dismantled during restoration works. A numerical analysis of the structural behavior of the joint is provided, in order to assess the different possible collapse mechanisms. The results obtained from the tests are promising for future developments of the application of these nano-composite materials.     

Explosion of a body in flight

Little attention has been paid up to now in the theory of explosions to such an important and interesting problem as the explosion of a body in flight. A formulation of the problem presented by such an explosion in connection with the problem of simulating the explosion of a meteorite body flying at cosmic velocity is given in [1]. In this case the kinetic energy of the translational motion may be comparable to or even in excess of the internal energy of the explosive transformation, which will lead to a significant distortion of the flow pattern compared with the usual explosion process. An analysis of the effect of the initial velocity of particles on the course of an explosion in idealized formulations in the framework of one-dimensional flows with plane, cylindrical, and spherical waves was first made in [2–4]. The asymptotic flow properties were found in these papers. It is shown that if the internal energy E_o and the kinetic energy K_o are separated (the specification of the latter for a fixed mass is equivalent to specification of the initial momentum), some intermediate self-similar regimes corresponding to a short pulse [2] or to flows with a sink [3, 4] are observed, these becoming the solution for a strong explosion at long times [1]. The time of transition from one qualitative regime to another depends on the ratio K_o/E_o. In the present paper the next step in the investigation of the question is taken. An axisymmetric, basically realistic flow model is studied.Translated from Izvestiya Akademii Nauk SSSR, Mekhanika Zhidkosti i Gaza, No. 5, pp. 126–129, September–October, 1984.     

The influence of acceleration and deceleration on shock wave movement on and around aerofoils in transonic flight

This paper examines the shock wave dynamics of a biconvex aerofoil in transonic flight during acceleration and retardation. The aerofoil has a cord length of 1 m and air at infinity is at 101.325 kPa and 300 K. Using Fluent as the CFD software, constant velocity (steady state) simulations were conducted at transonic Mach numbers. The aerofoil was then accelerated at 1041m/s² (106 g), starting at Mach 0.1, and decelerated at −1041m/s², starting at Mach 1.6, through the same range of Mach numbers using time-dependent (unsteady) simulations. Significant differences were found in the transonic region between the steady and the unsteady aerodynamic forces. Analysis of the flow field in this region showed that acceleration-dependent variations in the position of the shock wave on the surfaces of the aerofoil were the main reason for this. As very high accelerations were used in order to emphasize differences, which do not have many practical applications, simulations using accelerations lower than 9 g were also conducted in order to confirm the results. The acceleration-dependent behaviour of other shock waves around the aerofoil, such as the bow shock in front of the aerofoil and the trailing wave were also examined. The trailing wave followed behind the aerofoil changing position with different accelerations at the same Mach number.