The research of this dissertation is focused on how to simulate numerically the steady and unsteady subsonic , transonic and supersonic viscous flows around wing and aircraft by computational fluid dynamics method . on this basis , several kinds of aeroelastic problems of aircraft are investigated 本文的主要工作是利用计算流体力学( cfd )方法，数值模拟机翼和全机的定常及非定常粘性绕流，并在此基础上耦合结构动力学方程研究了飞行器的多种气动弹性问题。
The paper derived the formulae for the strain response mode with the knowledge of dynamics of structures , of materiaj mechanics , of elastic mechanics , and pointed out their use range . a computer program is worked out with fortran power stations 4 . 0 , it can compute the characteristic value , the characteristic vector and the strain mode for a bridge structure , and it is verified correct 论文综合结构动力学、材料力学、弹性力学等知识推导出桥梁结构应变响应模态模型的数学公式，指出了该方法的适用范围，基于fortranpowerstation4 . 0计算机工作平台，用fortran语言编制了能h算桥梁结构特征值及特征向帛羽小于变模态的哭小m序。
Based on the current research achievements on durability under chloride environment , probability theory , structural reliability theory , concrete structures theory , neural network theory and structure dynamic theory are employed comprehensively in this dissertation . some problems of durability of reinforced concrete structures under chloride environment were studied through the exploitation of experimental data , the rule of chloride ingress and steel bar corrosion , the performance of corroded member , and residual life prediction . the main issues and results in this dissertation are as follows : 1 、 the probability method for the prediction of durable life based on the stipulated reliability index for concrete structures under chloride environment is presented in this dissertation 本论文在国内外对氯离子侵蚀环境下混凝土结构耐久性研究成果的基础上,综合运用概率理论、结构可靠性理论、混凝土结构理论、神经网络理论、结构动力学理论等基本理论和方法,结合实际检测数据,按照氯离子侵蚀、钢筋锈蚀、锈蚀构件性能、锈蚀构件寿命预测的思路对氯离子侵蚀环境下钢筋混凝土结构耐久寿命预测的有关问题进行了深入系统地研究,完成以下主要研究工作并取得相应成果: 1 、提出了氯离子侵蚀下基于规定可靠指标的混凝土结构耐久寿命的概率计算方法。
The main achievements are as follows : based on the research of principles and methods of data collection and processing , the dissertation put forward using vxd to accomplish break response of hardware and utilizing control principle of dma to realize data transfer of high speed . so the dissertation conquers the defect of bad real - time characteristic of windows because of multitask function and message mapping and accomplish real - time of collection and analysis . and the dissertation develops the system of signal collection and analysis to test vibration and noise and analyze structure dynamics 主要工作及创造性成果如下：提出了利用vxd来实现硬件中断响应，并运用dma控制原理实现了高速数据传输，克服了windows操作系统多任务功能及消息映射机制所带来的实时性差的弊端，从而实现采集和分析的实时性，开发出适用于振动噪声测试、结构动力学分析和机械在线检测的信号采集分析系统。
Abstract : according to the dynamic demand of main shaft system , the structural dynamic modification method is used for correcting the stiffness of the supportings member and joints , so that the dynamic characteristic of main shaft system should meet the need of design . a practical structure of elastic supporting and elastic joints has been designed on the basis of corredcted stiffness of supporting and joint . the numeric simulation of main shaft system with elastic supportings and elastic joints are compared with its design requirement . their coincidence verifies the effectiveness of sdm method and the correctness of design method 文摘:根据细纱机主轴系统的动特性要求,应用结构动力学修改方法来修正支承和联轴节单元的刚度,以使主轴系统的动特性满足设计要求.根据修正过的支承和联轴节的刚度,一个弹性支承和弹性联轴节的实际结构已经被设计出.比较具有弹性支承和弹性联轴节的主轴系统的数字仿真与设计要求.其一致性证明了sdm方法的有效性和设计方法的正确性
Make use of the commercial software to built the virtual prototyping , and the kinetic and dynamic behaviors of the tilt - rotor have been systematically simulated and studied . the main research include as follows : the virtual prototyping model has been built , and on the platform of adams the dynamic property of virtual prototyping of v - 22 1 / 5 scale model ’ s rotor and wing system have been simulated and studied , according to the compared result to show the feasibility to analyze the tilt - rotor with the technology of virtual prototyping 本文的主要研究内容有:建立了多体系统动力学虚拟样机模型,在adams软件平台下对其旋翼/机翼系统的结构动力学特性进行仿真分析,并以v22倾转旋翼机1 / 5缩比模型为例进行对比分析,结果表明本文所建立的多体动力学模型能够应用于倾转旋翼机的运动学和结构动力学分析、研究。
The method of measuring acceleration by fiber bragg grating has been studied , kinetics model of fiber bragg grating accelerometer has been established , dynamic response of fiber bragg grating accelerometer has been analyzed , fundamental dynamic parameter ' s achieving technique of fiber bragg grating accelerometer have been offered 系统地研究了光纤光栅传感技术实现动态测试的原理，通过建立加速度传感器结构的动力学模型，分析了光纤光栅加速度传感器动态响应特性，提出了光纤光栅传感器结构动力学参数的基本实现技术。
