drum shell造句

• Hr 8309 packed in 220kg steel drums shell life are 6 months under20 , keep away from fire , high temperature , and sunlight . high temperature can make the shell life short ,
  Hr 229树脂包装为每桶净重220kg的金属桶，在20以下储存期为六个月，同时不宜靠近明火高温及阳光直射等，温度升高会相应缩短储存期,
• Hr 8310 packed in 220kg steel drums shell life are 6 months under20 . keep away from fire , high temperature , and sunlight . high temperature can make the shell life short
  Hr 8260树脂包装为每桶净重220kg的金属桶，在20以下储存期为六个月，同时不宜靠近明火高温及阳光直射等，温度升高会相应缩短储存期。
• Hr 8520 packed in 220kg steel drums shell life are 6 months under20 , keep away from fire , high temperature , and sunlight . high temperature can make the shell life short copyright 2005 - 2006 changzhou huarun composit materials co . , ltd
  Hr 8520树脂包装为每桶净重220kg的金属桶，在20以下储存期为六个月，同时不宜靠近明火高温及阳光直射等，温度升高会相应缩短储存期。
• Package , storage and carriage hr 8209 packed in 220kg steel drums shell life are 6 months under20 , keep away from fire , high temperture , and sunlight . high temperature can make the shell life short copyright 2005 - 2006 changzhou huarun composit materials co . , ltd
  Hr 8209树脂包装为每桶净重220kg的金属桶，在20以下储存期为六个月，同时不宜靠近明火高温及阳光直射等，温度升高会相应缩短储存期。
• Introducing the theory and application of boundary element method on the sound radiation , giving the process of solving vibration noise radiation problem using boundary element analysis software ; presenting the coupling theory and the combination analysis of finite element method and boundary element method , and doing relevant analysis based on close drum shell ; programming the noise data simulation program using the numerical calculation software , simulating the acoustic and pressure data of a key point in the transient response acoustic field of the close drum shell , realizing the audibility of the noise , using the virtual reality tools to simulate the vibration noise of the drum shell ; combining the finite element method and boundary element method to analyze the vibration noise radiation of some gear box , and completing the whole simulation process of the vibration noise of the gear box
  综合介绍了边界元法在声辐射问题上的理论及应用；并给出了运用边界元法分析软件求解振动声辐射问题的过程。阐述了有限元法和边界元法的耦合理论及组合分析方法，并以封闭鼓形薄壳为分析对象进行了相应的分析。利用数字计算软件编制了噪声数据模拟程序，并模拟了通过组合方法分析封闭鼓形薄壳瞬态响应声场而获得一关键点的声压数据，实现声音的可听化，随后通过虚拟现实工具实现了该情形下椭球壳振动噪声的虚拟仿真。
• The main content of this paper contains : summarizing the foundational theory of vibration and noise , and establishing the analysis and computation flow chart of noise acoustic field of mechanical vibration ; taking a close drum shell as the research object , analyzing its dynamic characteristics and vibration response using finite element method , then going with the structural - acoustic coupling analysis based on the acoustic model analysis of the aerial intracavity of the close drum shell
  论文的主要内容包括：对振动和噪声的基础理论进行了概述，并建立了结构振动噪声声场分析计算的流程图。以封闭鼓形薄壳为分析对象，运用有限元法分析了其的动态特性及振动响应；同时在分析了封闭鼓形薄壳空气内腔的声学模态的基础上，对其进行了声固耦合分析；并作了该结构模型的外场声固耦合谐响应分析。