中央空调配管系统动力学分析及软件开发

发布时间：2018-04-03 10:39

本文选题：中央空调配管系统　切入点：虚拟样机建模　出处：《合肥工业大学》2014年硕士论文

【摘要】：配管是中央空调器室外机最主要的部件之一，其设计问题是一大难点。传统配管设计中，工程师一般基于经验设计出初始方案，然后进行样机测试、方案整改等重复多次才能达到预期效果，成本高，效率低下。因此对中央空调室外机配管设计而言，开发一款动力学分析及优化平台对降低其研发成本和缩短研发周期有着重要的意义。本文对滚动转子式压缩机进行了载荷特点分析，介绍了一种通过压缩机振动测试数据反求出压缩机简谐激励载荷的方法。利用ANSYS软件对中央空调压缩机配管系统建立了虚拟样机模型，同时对系统进行了模态分析，获得了系统的模态分析结果，在施加载荷时，由于中央空调由多个压缩机系统组成，且各个压缩机激励的相角差在变化，，本文介绍了一种获得配管系统最大应力及对应相角差的方法，同时施加该相角差下的载荷激励进行谐响应分析，获得了配管系统的应力和位移特性，并对物理样机进行了应力测试，然后对测试结果和仿真结果进行了对比验证。在配管优化方面，本文对配管的U型弯位直线段方案设计、优化设计和配重优化等优化方法编写了标准APDL代码，并对其集成到软件平台，供工程师调用，有效的提高管路优化效率。最后，基于VC++程序平台，将配管系统数据提取、建模、分析和后处理等模块进行了集成，开发出了中央空调配管动力学分析及优化软件平台。该平台的投入使用免去了ANSYS繁琐的操作步骤，将大大提高新机型的研发效率，降低研发成本。
[Abstract]:Piping is one of the most important components of outdoor unit of central air conditioner, and its design problem is a big difficulty.In the traditional pipe design, engineers usually design the initial scheme based on experience, and then test the prototype. The plan can achieve the desired results with high cost and low efficiency.Therefore, the development of a dynamic analysis and optimization platform is of great significance to reduce the R & D cost and shorten the R & D cycle.In this paper, the load characteristics of the rolling rotor compressor are analyzed, and a method of calculating the simple harmonic excitation load of the compressor through the vibration test data of the compressor is introduced.The virtual prototype model of central air-conditioning compressor piping system is established by using ANSYS software, and the modal analysis of the system is carried out, and the results of modal analysis are obtained. When the load is applied, the central air conditioning system is composed of several compressor systems.And the phase angle difference of the compressor excitation is changing. This paper introduces a method to obtain the maximum stress and the corresponding phase angle difference of the piping system. At the same time, the harmonic response analysis is carried out by applying the load excitation under the phase angle difference.The stress and displacement characteristics of the pipe distribution system are obtained, and the stress of the physical prototype is tested, and the test results are compared with the simulation results.In the aspect of pipe distribution optimization, the standard APDL code is compiled for the design of straight line section of U-shaped bend position, optimization design and weight optimization, and integrated into the software platform for engineers to call.Effectively improve the efficiency of pipeline optimization.Finally, based on VC program platform, the modules of data extraction, modeling, analysis and post-processing are integrated, and a software platform for dynamic analysis and optimization of central air conditioning piping is developed.The input and use of the platform eliminates the tedious operation steps of ANSYS and will greatly improve the efficiency and reduce the R & D cost of the new model.
【学位授予单位】：合肥工业大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TB657.2

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