单-双联卡箍管路系统建模及动力学特性分析

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振动与冲击 ›› 2020, Vol. 39 ›› Issue (19) : 114-120.

论文

柴清东1，付强 1，马辉1, 2，韩清凯1, 2，张大志3

作者信息 +

Modeling and dynamic characteristics analysis for a pipeline system with single double-clamp

CHAI Qingdong1, FU Qiang1, MA Hui1, 2, HAN Qingkai1, 2, ZHANG Dazhi3

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文章历史 +

摘要

以航空发动机中的双联卡箍为研究对象，采用线性弹簧对其进行离散化等效处理。通过刚度测试装置获得双联卡箍的角刚度和部分线刚度；基于铁木辛柯梁理论建立两端固支条件下的双联卡箍管路系统的动力学模型，采用遗传算法结合模态试验搜索未能测定的双联卡箍刚度，其中仿真与试验固有频率误差不超过4.46%，两者频响函数吻合较好。在获得双联卡箍刚度的基础上，建立了单-双联卡箍管路系统的动力学模型，并通过锤击试验验证了模型的有效性，仿真与试验固有频率误差不超过3.86%，各阶振型对比较好，单-双联卡箍管路系统的动力学模型可用于卡箍管路系统振动特性分析工程实际之中。

Abstract

A double-clamp in aero-engine was taken as the study object and discretized equivalently into several linear springs. The stiffness testing device was used to obtain the double-clamp’s angular stiffness and parts of line stiffnesses. The dynamic model of a pipeline system with a double-clamp under the boundary condition of two fixed ends was established based on the theory of Timoshenko beam. The genetic algorithm (GA) combined with modal tests was adopted to search the double-clamp’s stiffnesses not being able to be measured by the stiffness testing device. It was shown that the error of the natural frequency between simulation and test is less than 4.46%; the frequency response functions of the two agree well with each other. Based on the obtained stiffnesses of the double-clamp, the dynamic model of a pipeline system with single double-clamp was established, and the hammer test was used to verify the effectiveness of the model. It was shown that the maximum error of the natural frequency between simulation and test is about 3.86%; modes simulated and those tested are consistent with each other; the established dynamic model here for pipeline systems with single double-clamp can be applied to analyze vibration characteristics of pipeline systems with clamps in engineering.

导出引用

柴清东1，付强 1，马辉1, 2，韩清凯1, 2，张大志3. 单-双联卡箍管路系统建模及动力学特性分析[J]. 振动与冲击, 2020, 39(19): 114-120

CHAI Qingdong1, FU Qiang1, MA Hui1, 2, HAN Qingkai1, 2, ZHANG Dazhi3. Modeling and dynamic characteristics analysis for a pipeline system with single double-clamp[J]. Journal of Vibration and Shock, 2020, 39(19): 114-120

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