摆盘发动机的虚拟设计与运动仿真

Virtual Design and Kinematic Simulation of Wobble Engine

应用虚拟样机技术,对水下航行器摆盘发动机进行了虚拟设计与动力学性能的仿真分析。在概念设计的基础上,建立了摆盘发动机的虚拟样机模型,虚拟样机包括了气缸、活塞、连杆、摆盘、斜轴、主轴以及推进器等摆盘发动机的主要部件。根据发动机的设计要求,确定了气缸分布圆直径、摆盘中心与气缸的距离、摆盘的倾角、连杆的长度作为发动机虚拟设计及仿真的重点。通过对发动机配气以及转速工况的模拟,分析了发动机的性能,主要部件的位移、速度与加速度,传动部件间的受力情况,探讨了发动机结构参数的修改对整机性能以及部件强度与振动的影响。在此基础上,确定了合理的发动机结构方案及参数。

The virtual design and kinematic simulation of the wobble engine adopted in the underwater vehicle were described. Based on the conceptual design, the virtual prototype of the wobble engine was established including the cylinders,the pistons, the connecting rods, the wobble disk as well as the slope shaft and the propeller. According to the requirements in the design of engine, several simulation parameters were determined, such as the diameter of the distribution circle of cylinders, the central position and the decline angle of the wobble disk, the length ol the connecting rod. Through the simulation of the work conditions, the dynamic properties of the engine such as the velocity and the acceleration of the main parts as well as the action forces among the engine components were investigated. The influences of the structural modification on the properties of the engine as well as the strength and vibration were discussed. The reasonable scheme of the engine structure with its fundamental parameters was finally determined based on the virtual design and simulation.