共查询到20条相似文献,搜索用时 93 毫秒
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本文针对汽车转向节静载试验及耐久性分析进行了研究。主要对转向节单孔静载和主轴静载试验进行了验证,记录了试验数据并处理了试验结果。通过不同工况下的耐久性试验,处理了各工况试验结果。根据耐久性试验结果,利用渗透探伤方法分析转向节裂纹,观察裂纹长度、深度及裂纹源,分析了转向节裂纹出现的原因并进行了改进。利用试验台架再次进行试验验证,并将有限元仿真预测结果和台架试验结果进行对标分析,分析了仿真与试验结果的差异性。 相似文献
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针对超声波车铣加工,设计了一种谐振频率30 kHz的圆环斜槽传振杆,阐述了30 kHz圆环斜槽传振杆纵扭共振的基本原理。利用有限元分析方法,计算了圆环斜槽传振杆的尺寸和斜槽的位置以及力学特性,并比较了有限元分析结果和理论结果。有限元分析结果比理论值结果小,是由于将圆环斜槽传振杆作为理想的模型。用阻抗分析仪对圆环斜槽传振杆进行了测试,并比较了测试结果和有限元分析值,偏差较小,相对偏差符合要求。实验测试结果表明,测试参数和设计结果一致。 相似文献
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介绍了电液比例控制系统,应用Pspice对电液比例放大器的主要电路进行了较全面的仿真。对该电路进行了实物测试,测试结果与仿真结果相符,符合设计要求。研究结果为电液比例放大器的设计提供了依据。 相似文献
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E. G. Bazulin A. E. Bazulin S. A. Kokolev T. M. Gur’eva 《Russian Journal of Nondestructive Testing》2014,50(6):307-317
A method of automated ultrasonic testing based on the use of a PAA flaw detector for the recording of echo signals followed by the reconstruction of the image of reflectors by applying the 3D variant of the method of projection in the spectral space (3D-PSS) is considered. Customized setting of the PAA flaw detector makes it possible to simulate the operation of many single-element transducers with different angles of incidence. This approach allows one to obtain the images of reflectors with a high resolution and a high signal-to-noise ratio at a depth of more than 100 mm. A procedure for the calibration of an antenna array on a prism operating in the mode of emulation of several piezoelectric transducers with different angles of incidence is discussed. The results of a testing a fragment of the support billet for the ITER diverter when obtaining the images by the classical PAA method and with the use of 3D processing, which demonstrate the efficiency of the developed testing technology, are presented. 相似文献
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提出一种简单的回波搜索法——滑动矩形窗回波搜索算法,该法可以排除因数据偶然突变而引起的搜索错误,通过对现场采集的1万多条数据处理分析,能取得很好的效果。 相似文献
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中国采用计算机控制技术进行气瓶水压试验装置已逐步投入使用,计算机控制的水压试验与传统的人工水压试验相比较具有效率高,精度高的特点。本文将介绍计算机控制气瓶外测法水压试验装置设计、试验压力和试验排水量测定的控制方法,讨论了气瓶外测法试验装置的状态监测方法。 相似文献
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I. A. Rastegaev V. P. Gomera S. A. Tyupin A. D. Smirnov A. V. Grigor’eva 《Russian Journal of Nondestructive Testing》2018,54(9):619-629
A method is proposed for assessing the quality of nondestructive testing and the technical condition of tanks and vessels used in petrochemical industries, depending on the methods of nondestructive testing employed in technical diagnostics. The probability of revealing a defect was used as a criterion when assessing the quality of technical diagnostics. Estimates are given for the probability of detecting a delamination in the vessel-body wall material of different area using various schemes of applying the basic methods of nondestructive testing. It is shown that the acoustic-emission method makes it possible to significantly increase the probability of detecting a delamination in the equipment wall without increasing the scope of work by virtue of local methods of nondestructive testing. A positive effect is achieved through the use of acoustic-emission testing data (the location maps and hazard levels of acoustic-emission sources) at the stage of planning the procedure of nondestructive testing during technical diagnostics of equipment. 相似文献
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Aleshin N. P. Krysko N. V. Skrynnikov S. V. Kusyy A. G. 《Russian Journal of Nondestructive Testing》2021,57(6):446-454
Russian Journal of Nondestructive Testing - The problems of detecting operational plane surface defects by the ultrasonic method of nondestructive testing with the use of Rayleigh surface waves... 相似文献
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V. K. Kachanov I. V. Sokolov S. L. Avramenko D. V. Timofeev 《Russian Journal of Nondestructive Testing》2008,44(12):820-831
A new multichannel acoustic method for testing large-size concrete building constructions is considered. The method is based on the use of a method of free vibrations (the resonance and impactecho methods) with the subsequent multiplication of partial spectral characteristics. The multichannel multiplicative method allows performance of acoustic testing of large-size compact concrete building constructions (blocks, beams, columns, supports, and other standard articles). 相似文献