· Mechanical System Dynamics (机械系统动力学)
· Dynamic Control (动力控制)
· Structural Strength (强度)
· Energy Management (能量管理研究)

· Research on Basic Theories of Mechanical System Dynamics and Multi-Physical Field Coupling Modeling Methods (covering basic dynamics research, suitable for all relevant researchers) (机械系统动力学基础理论与多物理场耦合建模方法研究（覆盖基础动力学研究，适配所有相关研究者）)
· Dynamic Characteristics and Experimental Verification Technology of Various Types of Mechanical Systems (Aerospace/Railway/Machine Tool, etc.) (多类型机械系统（航空/轨道/机床等）动力学特性及试验验证技术)
· Integrated Application of Basic Dynamic Control Algorithms and Intelligent Control (Machine Learning/Reinforcement Learning) for Mechanical Systems (机械系统动力控制基础算法与智能控制（机器学习/强化学习）融合应用)
· Power Distribution, Coordinated Control and Robustness Optimization of Mechanical Systems with Single/Multi-Power Sources (单/多动力源机械系统动力分配、协调控制及鲁棒性优化)
· Basic Theories and Engineering Evaluation Methods for Mechanical Structural Strength, Stiffness and Fatigue Life (机械结构强度、刚度及疲劳寿命基础理论与工程评估方法)
· Research on Strength Guarantee and Failure Mechanism of Mechanical Components Under Extreme Working Conditions/Complex Loads (极端工况/复杂载荷下机械部件强度保障与失效机制研究)
· Research on Efficient Energy Transfer, Conversion and Energy-Saving Management Strategies for Mechanical Systems (机械系统能量高效传递、转化及节能型管理策略研究)
· Energy Management Optimization of Mechanical Systems Under the Scenario of New Energy and Multi-Power Source Coupling (新能源与多动力源耦合场景下机械系统能量管理优化)
· Multi-Domain Collaborative Optimization of Mechanical System Dynamics, Dynamic Control, Strength and Energy Management (机械系统动力学-动力控制-强度-能量管理多领域协同优化)
· Application Research of Digital Twin/Data-Driven/Artificial Intelligence in the Four Core Fields of Mechanical System Dynamics (数字孪生/数据驱动/人工智能在机械系统动力学四大核心领域的应用研究)

Mechanical system dynamics, dynamic control, strength, and energy management are the core research fields of the Mechanical Engineering Discipline (E0503) in the Department of Engineering and Materials Science of the National Natural Science Foundation of China. They cover the key scientific issues and technical bottlenecks throughout the entire life cycle of mechanical systems from design, service to operation and maintenance, and serve as the core foundation for supporting the high-performance, high-reliability, and high-efficiency energy-saving operation of high-end equipment. Focusing on the cutting-edge directions and engineering needs of the E0503 field, this special topic systematically integrates four core research contents: mechanical system dynamics modeling and analysis, dynamic control strategy optimization, structural strength design and evaluation, and efficient energy management and scheduling. It constructs an integrated research framework of ""dynamic characteristics - dynamic control - strength guarantee - energy optimization"", which fully covers all research scopes of the National Natural Science Foundation E0503.

In terms of mechanical system dynamics research, the focus is on the dynamic modeling theories and methods of complex multi-body mechanical systems, nonlinear mechanical systems, and flexible mechanical systems. It explores the dynamic evolution laws, coupled vibration characteristics, dynamic response mechanisms, and parameter sensitivity of the systems, breaks through the bottleneck of dynamic modeling under multi-physical field (mechanical, electrical, thermal, etc.) coupling, and provides an accurate dynamic basis for the design of dynamic control strategies, structural strength verification, and energy optimization. Aiming at the problems such as uncertainty of dynamic loads, structural flexible deformation, and component wear and aging during the service process of high-end equipment, research on dynamic simulation and experimental verification is carried out to reveal the internal correlation between dynamic characteristics and equipment service performance, providing theoretical support for system optimization design.

In the field of dynamic control research, based on the core needs of power transmission and regulation of mechanical systems, advanced dynamic control strategies and methods are studied, including robust control, adaptive control, intelligent control (machine learning, reinforcement learning, etc.), and cooperative control. It realizes the precise regulation of the power output and motion state of mechanical systems, and improves the system response speed, control accuracy, and operation stability. Aiming at complex scenarios such as multi-power source coupling, variable working condition operation, and load fluctuation, the power distribution and coordinated control mechanism are optimized to solve the problem of cooperative matching between dynamic control and system dynamic characteristics, structural strength, and promote the development of dynamic control technology towards high efficiency, intelligence, and robustness.

In terms of structural strength research, the focus is on the strength, stiffness, fatigue life, and reliability evaluation of core components and the overall structure of mechanical systems. Research on structural strength design, load spectrum analysis, fatigue damage mechanism, strength verification, and optimization is carried out. Combined with advanced testing technology and numerical simulation methods, it explores the stress distribution, deformation law, and failure mechanism of structures under complex loads and extreme working conditions, establishes the correlation model between structural strength and dynamic characteristics, dynamic control parameters, proposes structural strength optimization design schemes, ensures the structural safety and reliable operation of mechanical systems throughout the entire service life, and breaks through the design contradiction between lightweight and high strength of high-end equipment.

In terms of energy management research, it focuses on the generation, transmission, conversion, and efficient utilization of energy in mechanical systems, studies energy management strategies and scheduling methods, optimizes energy distribution modes, improves system energy utilization efficiency, and achieves the goals of energy conservation, consumption reduction, and environmental protection and emission reduction. Combined with dynamic control strategies and structural strength constraints, a cooperative optimization model for efficient energy utilization and system performance guarantee is constructed, the influence mechanism of dynamic characteristics and dynamic control parameters on energy consumption is explored, and an intelligent energy management system is developed to adapt to new scenarios such as new energy access and multi-power source coordination, providing technical support for the efficient and energy-saving operation of mechanical systems.

Based on the research positioning of the National Natural Science Foundation E0503 field, this special topic integrates the internal correlation of the four core research directions, breaks through the technical bottlenecks of cross-integration of various fields, promotes the coordinated development of mechanical system dynamics, dynamic control, strength, and energy management. It provides important theoretical basis and technical support for the independent research and development, performance improvement, and reliability guarantee of high-end equipment, helps the high-quality development of China's mechanical engineering field, and provides reference for academic research and engineering applications in related fields.

机械系统动力学、动力控制、强度及能量管理是国家自然科学基金委员会工程与材料科学部机械工程学科（E0503）的核心研究领域，涵盖机械系统从设计、服役到运维全生命周期的关键科学问题与技术瓶颈，是支撑高端装备高性能、高可靠、高效节能运行的核心基础。本专题聚焦E0503领域的前沿方向与工程需求，系统整合机械系统动力学建模与分析、动力控制策略优化、结构强度设计与评估、能量高效管理与调度四大核心研究内容，构建“动力学特性-动力控制-强度保障-能量优化”的一体化研究框架，全面覆盖国自然E0503的所有研究范畴。

在机械系统动力学研究方面，重点围绕复杂多体机械系统、非线性机械系统、柔性机械系统的动力学建模理论与方法展开，探究系统动力学演化规律、耦合振动特性、动态响应机制及参数敏感性，突破多物理场（机械、电气、热学等）耦合下的动力学建模瓶颈，为动力控制策略设计、结构强度校核及能量优化提供精准的动力学基础。针对高端装备服役过程中的动态载荷不确定性、结构柔性变形、部件磨损老化等问题，开展动力学仿真与试验验证研究，揭示动力学特性与装备服役性能的内在关联，为系统优化设计提供理论支撑。

在动力控制研究领域，立足机械系统动力传递与调控的核心需求，研究先进动力控制策略与方法，包括鲁棒控制、自适应控制、智能控制（机器学习、强化学习等）、协同控制等，实现对机械系统动力输出、运动状态的精准调控，提升系统响应速度、控制精度与运行稳定性。针对多动力源耦合、变工况运行、负载波动等复杂场景，优化动力分配与协调控制机制，解决动力控制与系统动力学特性、结构强度之间的协同匹配问题，推动动力控制技术向高效化、智能化、鲁棒化发展。

在结构强度研究方面，聚焦机械系统核心部件与整体结构的强度、刚度、疲劳寿命及可靠性评估，开展结构强度设计、载荷谱分析、疲劳损伤机理、强度校核与优化研究。结合先进测试技术与数值仿真方法，探究复杂载荷、极端工况下结构的应力分布、变形规律及失效机制，建立结构强度与动力学特性、动力控制参数之间的关联模型，提出结构强度优化设计方案，保障机械系统在全服役周期内的结构安全与可靠运行，突破高端装备轻量化与高强度之间的设计矛盾。

在能量管理研究方面，围绕机械系统能量的产生、传递、转化与高效利用展开，研究能量管理策略与调度方法，优化能量分配模式，提升系统能量利用效率，实现节能降耗与环保减排目标。结合动力控制策略与结构强度约束，构建能量高效利用与系统性能保障的协同优化模型，探究动力学特性、动力控制参数对能量消耗的影响机制，开发智能能量管理系统，适配新能源接入、多动力源协同等新型场景，为机械系统的高效节能运行提供技术支撑。

本专题立足国自然E0503领域的研究定位，整合四大核心研究方向的内在关联，突破各领域交叉融合的技术瓶颈，推动机械系统动力学、动力控制、强度及能量管理的协同发展，为高端装备的自主研发、性能提升与可靠性保障提供重要的理论基础与技术支撑，助力我国机械工程领域的高质量发展，同时为相关领域的学术研究与工程应用提供参考与借鉴。