Operation condition transmission path analyzing method based on crosstalk reduction technology

Abstract

The invention discloses an operation condition transmission path analyzing method based on a crosstalk reduction technology. The objects of the invention are to eliminate a problem of a conventional operation condition transmission path analyzing method of mutual crosstalk between vibration sources and improve transmission path contribution calculation analysis precision. The operation condition transmission path analyzing method comprises steps that a crosstalk reduction model is established; responding signals of reference points and target points of all of testing conditions of a to-be-analyzed mechanical system are acquired, and are substituted into the crosstalk reduction model; the crosstalk reduction signals under the testing condition are acquired; according to the crosstalk reduction signals under the testing condition and the responding signals of the target points, an OTPA linear system equation is established and solved to acquire a transmissibility function matrix; the responding signals of the reference points under actual conditions, the crosstalk reduction model is solved to acquire the crosstalk reduction signal under every actual condition, and the crosstalk reduction signals under the actual conditions are multiplied by the transmissibility function matrix to acquire a contribution proportion of every transmission path, and then the operation condition transmission path analysis is completed.

Description

technical field [0001] The invention relates to the field of vibration reduction and noise reduction of mechanical equipment, in particular to a transmission path analysis method of operating conditions based on crosstalk reduction technology. Background technique [0002] The acoustic stealth performance of underwater vehicles is an important index to measure its safety and combat capability; the vibration and noise of cars and high-speed trains is an important index to evaluate vehicle performance. Therefore, effective monitoring and control of mechanical equipment vibration and noise is of great engineering significance for improving equipment performance. Controlling the transmission path of vibration or noise by applying damping materials or sound-absorbing materials is a very effective method in vibration reduction and noise reduction. The identification of vibration or noise transmission paths is the key to the problem. At present, transfer path analysis (TPA) is ofte...

AI Technical Summary

Problems solved by technology

Controlling the transmission path of vibration or noise by applying damping materials or sound-absorbing materials is a very effective method in vibration reduction and noise reduction. The identification of vibration or noise transmission paths is the key to the problem. At present, transfer path analysis (TPA) is often used ) or operating condition transfer path analysis (OTPA) method to identify the vibration or noise transfer path, and the traditional transfer path analysis method is difficult to quickly and effectively identify in engineering practice due to its complex frequency response function test and load identification process The transfer path, the transfer path analysis method of operating conditions is a rapid analysis method of the transfer path that has emerged in recent years. This method uses the test condition data to identify the transfer rate function matrix and applies it to the actual condition data to obtain the transfer path Contribution results, this method is simple and fast, and is widely used in engineering practice

[0003] However, during the implementation of the OTPA method, there is often a serious cross-coupling between the vibration sources, which makes the measured reference point response signals crosstalk with each other and cannot accurately reflect the characteristics of the vibration source, making the path contribution calculated by OTPA large. error

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