摘要
高精度的三维仿真可以满足复杂的动力学分析要求,覆盖全循环的一维动力学计算,可减少三维计算量,节约计算成本。以二冲程航空重油发动机的曲柄连杆机构为例,探讨一维和三维联合动力学仿真方法的可行性和适用性,以期在提高计算效率的同时保证计算精度。一维分析基于GT-POWER的发动机热力循环与动力学模型;三维动力学分析为基于ABAQUS的考虑几何与状态非线性的运动弹性动力学理论的有限元方法。分析表明两种分析方法相符性好,精确度高,并与理论模型的解析解对比,误差保持在3%以内。一维和三维联合动力学仿真方法为二冲程重油航空发动机的设计及结构优化提供理论依据。
High-precision three-dimensional simulation can meet complex dynamic analysis requirements,one-dimensional dynamics calculation covering full cycle can reduce three-dimensional calculation and save computational cost.This paper takes the crank-connecting rod of two-stroke aviation heavy oil engine as an example,exploring the feasibility and applicability of one-dimensional and three-dimensional dynamics co-simulation methods,in order to improve calculation efficiency while ensuring calculation accuracy.One dimensional analysis based on the one dimensional co-simulation of GT-POWER engine thermal cycle and dynamics model;Three dimensional analysis based on ABAQUS finite element method for kineto-elastic dynamics theory considering geometry and state nonlinearity.The results show that the two analytical methods are consistent and accurate,and compared with the analytical solution of the theoretical model,the error is kept within 3%.The one-dimensional and three-dimensional dynamics co-simulation methods provide theoretical basis for the design and structural optimization of two-stroke heavy oil aeroengines.
作者
蔺红鹏
杜发荣
徐征
周煜
Lin Hongpeng;Du Farong;Xu Zheng;Zhou Yu(School of Energy and Power Engineering,Beihang University,Beijing,100191,China)
出处
《小型内燃机与车辆技术》
2019年第1期30-38,共9页
Small Internal Combustion Engine and Vehicle Technique
基金
国家自然科学基金面上项目(51775025)
国家自然科学基金青年基金(51205015)
