论文部分内容阅读
以某款集中驱动式电动车的动力总成为研究对象,考虑冷却液和润滑油的影响,建立详细的流体-机械耦合模型,进行模态及动态响应研究。首先,对比流固耦合模态仿真和动力总成模态试验结果,证明所提综合耦合模型的准确性;然后,单独考虑冷却液和润滑油的影响,分别建立考虑冷却液的模型和考虑润滑油的模型,通过模态仿真分析两类液体对动力总成固有频率的影响程度;最后,进行流固耦合模型在电机电磁激励下的振动响应仿真,并与不考虑液体影响的原始模型仿真结果进行对比分析。结果表明,所提综合耦合模型能够充分考虑冷却液、润滑油及机械部件对总成振动的影响,展现丰富的动力学现象,可为进一步的优化设计提供有效地仿真平台。
Taking a powertrain of a centrally driven electric vehicle as a research object, a detailed fluid-mechanical coupling model is established to study the modal and dynamic response considering the influence of coolant and lubricating oil. First of all, comparing the fluid-structure coupling modal simulation and the powertrain modal test results, the accuracy of the coupled model is proved. Then, considering the influence of the coolant and the lubricating oil separately, the model considering the coolant and the lubrication Oil model, the influence of the two types of liquids on the natural frequency of the powertrain is analyzed by modal simulation. Finally, the vibration response simulation of the fluid-solid coupling model under the electromagnetic excitation of the motor is carried out and compared with the simulation results of the original model without considering the liquid influence For comparative analysis. The results show that the proposed comprehensive coupling model can fully consider the influence of the coolant, lubricating oil and mechanical components on the assembly vibration, exhibit rich kinetic phenomena and provide an effective simulation platform for further optimization design.