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第 37 卷 第 5 期                                                                        Vol. 37, No.5
             2018 年 9 月                          Journal of Applied Acoustics                 September, 2018

             纪念应崇福院士诞辰100周年




                          基于二维声子晶体结构的大尺寸超声

                                               塑料焊接系统                    ∗





                                            王 莎     1  林书玉      1†   段祎林     2


                                        (1 陕西师范大学    陕西省超声学重点实验室        西安   710119)

                                               (2 西安石油大学理学院      西安   710065)
                摘要    在大尺寸的圆柱形超声塑料焊接系统的工具头上加工周期性槽，形成一种二维声子晶体结构。对基于
                二维声子晶体结构的圆柱形工具头进行了声子晶体的带隙分析，并对优化设计后的该超声塑料焊接系统进行
                数值模拟。探讨了开槽前后超声塑料焊接系统振型的变化以及工具头输出端面纵振动的位移分布。研究结果
                表明，二维声子晶体结构能有效地抑制横向振动，增强纵向振动，并均匀输出端面的振幅，可以实现对超声塑
                料焊接系统的优化设计。
                关键词     声子晶体，超声塑料焊接系统，横向振动，耦合振动
                中图法分类号: O426.2          文献标识码: A          文章编号: 1000-310X(2018)05-0811-06
                DOI: 10.11684/j.issn.1000-310X.2018.05.029




             A large-size ultrasonic plastic welding system based on two-dimensional phononic

                                                   crystal structure



                                        WANG Sha   1   LIN Shuyu 1   DUAN Yilin 2

                          (1 Shaanxi Normal University, Shaanxi Key Laboratory of Ultrasound, Xi’an 710119, China)
                                    (2 School of Science, Xi’an Shiyou University, Xi’an 710065, China)

                 Abstract  The tool head of a large-sized cylindrical ultrasonic plastic welding system is machined with grooves
                 having a periodic structure. A two-dimensional phononic crystal structure is formed. The bandgap of a
                 cylindrical tool head based on a two-dimensional phononic crystal structure is analyzed. After the optimal
                 design, the cylindrical ultrasonic plastic welding system based on the two-dimensional phononic crystal structure
                 is numerically simulated. The variation of the vibration mode of the ultrasonic plastic weling system before and
                 after slotting and the displacement distribution of the longitudinal vibration of the output face of the tool head
                 of the ultrasonic plastic welding system are discussed. The results show that the two-dimensional phononic
                 crystal structure can effectively suppress lateral vibration, enhance longitudinal vibration, and evenly output
                 the amplitude of the end face. The optimal design of the ultrasonic plastic welding system can be achieved.
                 Key words Phononic crystal, Ultrasonic plastic welder, Lateral vibration, Coupled vibration

             2018-06-13 收稿; 2018-08-02 定稿
             国家自然科学基金项目 (11474192, 11674206)
             ∗
             作者简介: 王莎 (1994- ), 女, 浙江宁波人, 硕士研究生, 研究方向: 声子晶体。
             † 通讯作者 E-mail: sylin@snnu.edu.cn
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