实验室井架模型的动态测试研究

井架倒塌事故时有发生,因而合理地预报出井架结构的实际承载能力,已成为石油井架安全评定理论研究的重要内容。首先用振动分析理论研究了井架结构承载能力与其动态参数之间的关系,并通过实验室井架模型的动态测试结果从实验方面验证了二者之间的关系。在此基础上,提出井架结构安全承载力动态参数评定方法,并应用此方法对实验室井架模型进行了安全评定。为了保证评定结果的可靠性,提出在实际应用中测试大于井架额定钩载的10%的2种不同载荷值下,井架结构固有频率的井架安全承载力评定方法。该方法揭示了井架承载能力与其结构固有频率参数之间的关系,开辟了石油井架动态测试与安全评定新的途径。

Dynamic testing study of the lab derrick model

For many years, some accidents of derrick collapse have happened occasionally, so to forecast the actual bearing capacity of derrick structure reasonably, which has become the important content of the rig derrick safe evaluation research. This paper first analyzed the relationship between the dynamic parameter of derrick structure and the load acting on it by vibration theory, and to confirm it through the laboratory derrick model dynamic test. On this basis, the dynamic parameter evaluation method of the derrick safety bearing capacity had been proposed. And this method was used to the laboratory derrick model. In order to guarantee the reliability of the evaluation result, the method to evaluate derrick safety bearing capacity was proposed by testing the natural frequencies of the derrick under two different loads acting on it, the load is more than 10 of the security hook load in practical application. This method has promulgated the relationship between derrick bearing capacity and the natural frequency of it, and inaugurated the new way to test and evaluate petroleum derrick.