【作者】 林涛；

【导师】 于建华；

【作者基本信息】 四川大学 ， 结构工程， 2003， 硕士

【摘要】 对离心力—振动复合环境的研究，有着广泛的工程应用。用分时独立的试验手段不能正确预测复合环境影响下设备的可靠性，因此，研究复合振动环境试验有着重要的意义，它可以预测在单一环境试验中所不能估计的潜在故障，有利于提高其在工程应用上的使用可靠性。本文主要是对振动—离心复合环境数值模拟问题进行一些探索和尝试。 本文在深入研究离心机以及振动台的实验机理，尤其是复合离心机振动台的实验设计机理后，基于多刚体动力学分析，建立了振动台顺臂安装于离心机机臂上的力学模型，基于Hamilton原理得到的拉各朗日运动方程，得到了复合动力学环境下的运动支配方程，并给出了相应的数值求解方法；将离心机臂作为柔性梁，用瞬态有限元的方法进行仿真分析，采用计算软件ANSYS分析了离心机臂和复合系统的模态，并得到了柔性机臂—振动台系统的动力学特性。 最后，在C++Builder环境下编制相应计算程序求解动力学方程，并对不同建模结果进行了比较，算例仿真结果表明，本文建立复合离心机振动台系统力学模型是正确的，从精度、效率、可靠性上均可满足实际工程需要。因此，本文为复合环境下系统的减振、隔振设计和控制系统的设计提供了理论的依据。更多还原

【Abstract】 The research of centrifugal force-vibration compound environment has comprehensive engineering application. As the reliability of equipments in compound environment can’t be forecasted exactly by means of time-sharing unattached tests, the research has important significance. The compound test can forecast latent failure that can’t be estimated in single environment test and favor to improve the reliability of equipments.In this paper, firstly, the experimental mechanism of centrifuge as well as vibrator, especially centrifuge-vibrator compound system is introduced. On the base of multi-rigid body dynamics, the mechanics model of vibrator installed on the arm of centrifuge is founded. Then the dominant motion equation that is based upon Hamilton principle and Lagrange motion equation is obtained. Thereby, relevant numerical solution methods are given. Subsequently, this paper looks the arm of centrifuge upon soft beam and uses transient FEM in simulation analysis. The mode of the arm of centrifuge and the dynamic characteristic of soft beam-vibrator compound system are solved by ANSYS.At last, the simulation analysis of numerical examples demonstrates that the mechanics model of centrifuge-vibrator compound system is right and satisfies the demands of practical engineering. Therefore, this paper provides with academic foundation of system design of decreasing vibration, separating vibration and control in compound environment.更多还原