高速人字行星齿轮系统多场耦合激励机理及振动噪声优化研究

There are complicated service conditions, multiple excitation sources and strong coupling effects between internal temperature field, fluid field and structure field for high-speed herringbone planet gear system of aircraft engine. It presents the strong coupling characteristics between external excitation of varying load, internal excitation of gear pair and flexible supports. Problems about system vibration and noise are highlighted. For the key scientific problems of the mechanisms of multi-field coupling and the mechanisms of generation and propagation of vibration and noise under multi-source excitation, the theoretical and experimental study on high-speed herringbone planet gear system will be carried out in this project. The refinement modeling and solution approaches of heat fluid coupling of gear system will be studied. Establishing the mathematical representation of internal dynamic excitation under external excitation of varying load and multi-field coupling, the influence of design parameters, machining error and operation conditions on multi-source dynamic excitation can be clarified, and the multi-field coupling excitation mechanisms of high-speed herringbone planet gear system will be revealed. Based on the multiple surrogates technology, the mapping relationship between vibration response, radiated noised and system parameters can be built, and optimal system parameters will be searched through multi agent model with vibration and noise as optimization objectives. The combined optimization model which integrates the response, the acoustic and the mass of gear system is put forward along with effective solution method. It has an important theoretical and engineering value for mastering the design technology of high speed herringbone planet gear system, as well as the realization of reduction of vibration and noise, reduction of weight and reliable operation.

航空发动机高速人字行星齿轮系统使役条件复杂多变，激励源多，其内部温度场、流场及结构场间存在较强的耦合效应，且变载荷外部激励、齿轮副内部激励和柔性支撑间呈现强耦合特征，系统振动噪声问题尤为突出。本项目针对高速人字行星齿轮系统的多场耦合激励机理和多源激励下振动噪声产生传播机制两个关键科学问题进行理论与实验研究，开展齿轮系统热流固耦合精细建模及求解方法研究，建立变载荷外部激励与多场耦合下内部动态激励的数学表征，阐明设计参数、制造误差及运行工况对多源动态激励的影响规律，揭示高速人字行星齿轮系统多场耦合激励机理；进而基于多代理模型技术建立振动响应、辐射噪声与系统参数间的映射关系，构建振动噪声优化目标的多代理模型搜寻最优系统参数，提出齿轮系统响应-声学-质量联合优化建模及高效求解方法。该研究对掌握高速人字行星齿轮系统设计技术，实现发动机齿轮传动的减振降噪、轻量化与可靠运行有着重要的理论和工程价值。

航空发动机高速人字行星齿轮系统使役条件恶劣，其内部温度场、流场、结构场之间存在较强的耦合作用，内外部动态激励复杂，系统振动噪声问题突出。本项目以齿轮传动涡轮风扇发动机高速人字行星齿轮系统为研究对象，开展了多物理场耦合多源激励机理、响应-声学-质量联合优化等方面研究，构建了人字行星齿轮系统热流固多场耦合仿真模型，明晰了运行工况、润滑参数、齿面形貌与润滑状态、系统温升的关联关系；建立了基于多物理场耦合的多源动态激励计算模型，研究计及支点不对中、机翼颤振、轮齿修形、多场耦合效应的齿轮系统动态激励，揭示了高速人字行星齿轮系统多场耦合多源激励机理；构建了人字齿轮系统刚柔耦合瞬态动力学模型、均载模型及声振耦合数值分析模型，分析了齿轮系统非线性动力学特性，阐释了运行工况、轴承参数对均载性能的影响规律，实现了辐射噪声预估；基于振动响应、噪声响应代理模型与系统重量函数，提出了振动-噪声-质量联合优化数学模型，实现了齿轮系统参数优化设计，形成了人字行星齿轮系统低振动、低噪声及轻量化多目标联合优化设计方法，项目研究成果可促进对我国人字行星齿轮传动装置技术创新能力和产品竞争力的提升。本项目执行期间发表了SCI/EI论文16篇；申请了发明专利2项，其中授权1项；登记了软件著作权1项。