Hybrid Dynamic Testing for Structural Model and Numerical Model

本文研究了一种混合动力试验系统的研制，该系统可用于复杂结构和大型结构的试验研究。所提出的测试系统由两个组件系统组成。单组分系统是由个人计算机和数字信号处理器组成的数值模拟系统。二是真实的结构模型试验系统。数值模拟模型与真实的结构模型之间的干扰通过使用称重传感器测量并由个人计算机控制。针对以下三种情况进行了实验研究。(1)簧上质量系统一个簧上质量是数值模拟的，另一个是由螺旋弹簧和金属配重制成的。该测试系统再现了耦合振动现象。(2)对横浪中船舶的横摇运动进行了数值模拟。货舱内流体的晃动是用一艘在其外侧装有测压元件的水船来模拟的。该系统虚拟地实现了船舶运动与水面晃荡的耦合。(3)海洋浮式结构物数值模拟了海洋浮式结构物在入射波激励下的弹性响应。动态阻尼器由簧载质量制成。利用上述计算机辅助测试系统进行了振动控制实验。

A study on the development of a hybrid dynamic testing system is carried out, The hybrid dynamic testing system is intended to be used for the experimental studies of complicated and/or huge structures. The presented testing system consists of two component systems. The one component system is the numerical simulation system with the personal computer and digital signal processor. The another one is the testing system of the real structural model. The interference between the numerical simulated model and the real structural model is measured by use of load cells and is governed by the personal computer.The experimental studies are carried out for the following three cases.(1) Sprung Mass SystemOne sprung mass is numerically simulated and the another one is manufactured from a helical coil spring and a metal weight. The coupled vibratory phenomenon is reappeared by the presented testing system.(2) Ship MotionThe rolling of the ship in beam sea is numerically simulated. The sloshing of the fluid in the cargo hold is modeled by a water vessel with load cells in its out sides. The Coupling of the ship motion and the water sloshing is virtually realized by the presented system.(3) Floating Marine StructureThe elastic response of the floating structure excited by the incident wave is numerically simulated. The dynamic damper is manufactured from a sprung mass. The experiment of the vibration control is carried out by means of the computer aided testing system mentioned above.