Adams中振动后台运行
Adams中振动后台运行本文主要说明利用Adams/Vibration模块在频域范围内进行后台分析,在这实际工程中有一定的应用。要完成这一分析流程，需要借助Python编译环境，Python作为一款应用广泛的编程软件，在很多工程仿真软件上都有其拓展应用的身影。基本步骤：l利用Adams创建振动分析用的模型，并以Adm方式保存，还需要有控制仿真过程的脚本文件，即Acf文件；l利用Adams与Python的接口功能定义激励信号，输入通道，输出通道；l利用Adams与Python的接口功能定义输出，将线性系统的频响特性保存在Xml文件中，同时生成Cmd文件用于Adams后处理；具体执行过程如下：第一,启动cmd命令窗口，并将工作路径指定到相关位置：C:\Users\cnzc8469\Desktop\batch。http://www.caetecc.com/data/attachment/forum/201407/30/093943jd89888erjwlrpsl.jpg
点击回车后会产生如下变化，但最关键的是如下文件的生成：http://www.caetecc.com/data/attachment/forum/201407/30/093944jl61jn4cd0wd1o7m.jpg
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这里面关键的设置在Python脚本文件中，需要工程师首先熟悉Python的语法格式以及同Adams相关的API，可以参考帮助下的Testing your model章节，又详细地接口函数说明。frommsc.ADAMS.Vibration.AvActuator import *frommsc.ADAMS.Vibration.AvOutputChannel import * frommsc.ADAMS.Vibration.AvInputChannelimport * frommsc.ADAMS.Vibration.AvLinearize import * frommsc.ADAMS.Vibration.AvUtils import *fromAvPPTCmdExporter import *############################################这一部分相当于Include包含文件功能 defmessage_handler(msg, type, data): """Message handler forvibration""" if type == "i": print "ADAMS/Vibration Info: %s"% (msg) elif type == "w": print "ADAMS/Vibration Warn: %s"% (msg) else : print "ADAMS/Vibration Error: %s"% (msg) if __name__ =='__main__':# open a log file for logging messageslogFile = open("sla_batch.log","w")try: # Check out the vibration license vib_ok = AvAPI.AcquireLicense() if vib_ok: # set message handler AvAPI().PushMessageHandler(message_handler, []) # 创建激励信号 act_vert = AvActuatorSweptSine('SS1','Displacement', 5, 0) #创建输入通道，注意相关参数 InChVert =AvInputChannelMarker("PadDispInput", 114, "Translational","Global", "Z", act_vert) inList = # 创建输出通道 CVA=AvOutputChannelPredefined("ChassisVertAccl", 105,"Acceleration", "Z") # Measure acceleration at steering rack. TRA=AvOutputChannelPredefined("TieRodAccl", 100,"Acceleration", "X") outList = base_name = "sla_batch" MDI_CPU = os.environ['MDI_CPU'] TOPDIR = os.environ['topdir'] if MDI_CPU == "win32": if os.path.isdir(TOPDIR) != 0: TOPDIR = os.environ['SHORT_TOPDIR'] base_path =TOPDIR+'/vibration/examples/python_batch_analysis/'+base_name model = base_path+".adm" acFile = base_path+".acf" #上面两行读取对应模型与脚本控制命令文件 mList = [] # 创建振动仿真分析参数，如模型名称，频域设定等 Model = AvLinearModel(model, inList,outList, acFile, True, base_name, mList) if Model: # set the frequencies f = AvMakeFrequency(0.1, 250, 500,True) Freq = AvAPI_Matrix(len(f), f) # 计算频响 FR = Model.FrequencyResponse(Freq) # 传递函数 TF = Model.TransferFunction(Freq) # 将计算结果写入到XML文件中 matFile =open(base_name+".xml", "w") writeXMLHeader(matFile) writeMatrixXML(matFile, Freq,"Frequency range" ) writeMatrixXML(matFile, FR, "Frequency Response") writeMatrixXML(matFile, TF, "Transfer Function" ) writeXMLFooter(matFile) matFile.close() # 生成CMD文件用于后处理中 amdModel = AvAMD(model) pptCmdExporter =VibPPTCmdExporter(".sla_basic", base_name+".cmd", amdModel,inList, outList, 0.1, 250.0, 500, True) pptCmdExporter.writeCmdForPPT(base_name) else: logFile.write("Could not producelinear model check execution display for errors.") AvAPI().PopMessageHandler() # 检查口令许可 AvAPI.ReleaseLicense() else: logFile.write("Could not getADAMS/Vibration Solver license")except Exception: formatExceptionInfo(logFile) 最后，可以直接打开Adams后处理界面，将生成的CMD文件导入，查看相关信息，如频响等内容。
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