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首页> 外文会议>International Symposium on Stability Control of Rotating Machinery(ISCORMA-4); 20070827-31; Calgary(CA) >Investigation of Transient Response under Shock Load in a High Speed Separator with Nonlinear Support Elements
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Investigation of Transient Response under Shock Load in a High Speed Separator with Nonlinear Support Elements

机译：带有非线性支撑元件的高速分离器在冲击载荷下的瞬态响应研究

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摘要

High speed separators used in naval ships are required to be tested with shock load and to be certified for shock resistance. ALFA LAVAL experience of separator operations shows that contact or rubbing between rotating a bowl and a frame hood at full speed could cause severe damage to the separator. In order to prevent this kind of contact under shock testing, it is very essential and important for us to predict rotor vibration amplitude under various shock loads. This paper describes a computational model predicting the transient response of a rotor and a frame of a separator under a shock load. There are three main major difficulties in solving transient response of a high speed separator. These are 1) Ill-conditioned matrices need a carefully selected numerical method in order to obtain numerical convergence; 2) Nonlinear effect of some supporting elements occurs because of large vibration amplitudes of the rotor and the frame; 3) Damping values play a key role in transient response of the separator. However it is extremely difficult to get a good damping model. A shock test on one of our newly developed separators has been carried out and the results from the computation and the testing have been compared. The comparison gives us sufficient information on how to perform the transient calculation for our separators with the same shock requirement.
机译：海军舰船上使用的高速分离器必须经过冲击载荷测试并获得抗冲击性认证。 ALFA LAVAL分离器操作的经验表明，全速旋转转鼓和机架罩之间的接触或摩擦可能会严重损坏分离器。为了防止在冲击试验中发生这种接触，预测各种冲击载荷下的转子振动幅度对我们来说非常重要和重要。本文介绍了一种计算模型，该模型可预测转子和分离器框架在冲击载荷下的瞬态响应。解决高速分离器的瞬态响应存在三个主要困难。它们是：1）病态矩阵需要认真选择数值方法以获得数值收敛； 2）由于转子和机架的振动幅度较大，因此会产生某些支撑元件的非线性作用； 3）阻尼值在分离器的瞬态响应中起关键作用。但是，要获得良好的阻尼模型非常困难。我们对其中一个新开发的隔板进行了冲击测试，并对计算和测试结果进行了比较。比较结果为我们提供了有关如何在具有相同冲击要求的情况下对隔板进行瞬态计算的足够信息。

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