Hybrid Dynamic Testing for Structural Model and Numerical Model

开展了用于复杂和/或巨型结构试验研究的混合动力试验系统的研制。该测试系统由两个组件系统组成。单部件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。另一个是真实结构模型的测试系统。数值模拟模型与实际结构模型之间的干涉是用称重传感器测量的，并由个人计算机控制。对以下三种情况进行了实验研究：(1)弹簧质量系统一个弹簧质量被数值模拟，另一个由螺旋弹簧和金属重量制造。船舶运动数值模拟了船舶在横浪中的横摇运动。货舱内流体的晃动由外侧装有称重传感器的水船模拟。该系统实质上实现了船舶运动与水中晃动的耦合。(3)浮式海洋结构物--浮式结构物在入射波浪激励下的弹性响应的数值模拟。动力阻尼器是由弹簧质量制成的。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.