Light, wind-induced vibration measurement analysis of solar home lights

A linear elastic structure or mechanical system, while under outside incentive or dynamic load, the motion state depends on its physical properties, including its weight distribution and elastic properties ( Flexibility or stiffness) Distribution or damping and energy consumption mechanism, in the form of proper parameters to



as a linear elastic structure or mechanical system, while under outside incentive or dynamic load, the motion state depends on its physical properties, including its weight distribution and elastic properties ( Flexibility or stiffness) Distribution or damping and energy consumption mechanism, in the form of the appropriate parameter to characterize these features, forming mathematical model, it is dynamic analysis 【 Structural dynamic analysis is one of the main content of CAE analysis. 】 The starting point. An actual mechanical or engineering structure in the study of its vibration problems, always take it as a simplified, abstracts its main mechanics nature, form an ideal mechanical model. The characteristics of the model is expressed by several parameters. As a speaking, for example, a practical mechanical structure, as a continuous elastic body to consider its vibration problem, need unlimited since by degrees to describe the vibration state. In many cases, however, some parts of the structure can often as a rigid body, even as the number of rigid body by spring coupling. As a result, an infinite degrees of freedom' Degrees of freedom ( 自由度,df) In mathematics can free variable number of values, if you have three variables x, y, z, but x + y + z = 18, so its degrees of freedom equal to 2. 】 The system was simplified into a limited degree of freedom system. In fact, some of it looks very complicated structure, even can be simplified as a single degree of freedom system and use it to study of the structure under the condition of a certain vibration problem can still get a satisfactory accuracy. From the real structure to the simplified to single degree of freedom system' Refers to the single degree of freedom system at any time as long as a generalized coordinate system can completely determine its position. 】 Of some of the system, it is a kind of conditional extreme abstractions. Such as the design of the pendulum, single disc rotor vibration, heavy machinery The heavy machinery is the only comprehensive science and technology journals in China heavy machinery industry, hosted by xi 'an heavy machinery research institute of ministry of mechanical and electrical. 】 The active vibration isolation of the Install the machinery or equipment in appropriate measures of the elastic device to isolate vibration. 】 Such as simplified into single degree of freedom to analyze problems, still can get satisfactory results. More important is the meaning of single degree of freedom model reveals many nature of the system vibration is like as well as the research method is a structural vibration 【 With the principle of structural dynamics study vibration problems of various kinds of engineering structures. 】 The basis of the research.