In the actual low noise pipeline system installation construction, due to ship installation space constraint, there always have no space near the vibration source to install the flexible pipe, in that time the installation location of flex-ible pipe usually will be changed. Because of the change of the flexible pipe installation position, the pipeline system vibra-tion characteristic is also changed. In view of the problems above, the finite element model of the flexible pipe is set up, the installation position of the flexible pipe is changed, and the vibration characteristic of the specified point in the unit excita-tion is calculated. The results show that although the theory of flexible pipe arrangement should be as close to the source, but in the actual installation process, if the installation space does not allow, the relative position between the flexible pipe and vibration source can be adjusted according to the space, experiments show that reasonable adjustment of the installation posi-tion between flexible pipe and the vibration source have little effect on pipeline system vibration and noise control. This re-search will provide practical reference and theoretical basis for the low noise installation of pipeline system.%在实际管路系统低噪声安装施工中,由于受船舶安装空间因素的限制,振源附近通常没有位置安装挠性接管,此时往往会改变挠性接管的安装位置.由于挠性接管安装位置改变,管路系统振动特性也随之改变.针对以上问题,建立安装有挠性接管管路系统的有限元模型,改变挠性接管安装位置,计算指定点在单点激励下的振动特性,最后进行实验验证.结果表明:尽管理论上挠性接管的布置应尽量靠近振源,但在实际安装过程中,若安装空间不允许,可根据空间位置适当调整挠性接管与振源的相对位置,实验证明合理地调整其安装位置对管路系统振动噪声控制影响较小.这一研究将为管路系统挠性接管的低噪声安装提供实践参考和理论依据.
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