冗余驱动地震模拟台虚拟样机动力学分析

Dynamic analysis of the actuated redundantly parallel seismic simulator by using the virtual prototype software

以实体造型软件SolidWorks及多刚体动力学软件ADAMS为工具,对一种冗余驱动地震模拟台进行虚拟样机搭建及动力学分析.首先在SolidWorks中搭建好冗余驱动地震模拟台的装配体模型,然后导入ADAMS中完成虚拟样机构建.利用ADAMS软件对地震模拟台末端添加运动,通过运动学与动力学逆解计算出滑块的位置、速度、加速度、驱动力矩及功率,采用后处理模块对驱动功率的绝对值积分求解出驱动电机的作功.根据给定的轨迹,仿真结果表明:在8个电机中,第3个电机的最大驱动力矩、驱动功率与作功均大于其余电机.该过程免去了繁琐的理论建模及编程工作,可快速实现冗余驱动地震模拟台的动力学分析,为物理样机的建造提供依据,体现了虚拟样机技术的优越性.

The process of building the virtual prototyping and the dynamic analysis of a kind of actuated redundantly parallel seismic simulator was carried out by using the solid modeling software SolidWorks and the multibody dynamics software ADAMS. The virtual prototyping was built by virtue of SolidWorks and ADAMS. Then the position, the velocity, the acceleration of the sliders, the driving torque and power were calculated when the motion of the moving platform was defined in ADAMS. Finally, the required output work was also achieved by means of Post- Processor. The simulation results show that the maximal driving torque, the maximal driving power and the output work of the 3rd motor are biggest among all the motors according to the given trajectory. The whole process reveals the advantages of the virtual prototyping technique since it not only reduces the work of complex modeling and programming, but also completes the dynamic analysis of the parallel seismic simulator rapidly for the building of the prototype.