Modeling and analysis of bridge-type compliant mechanism with elliptical shell

A new 2-DOF microgripper, which can perform the processing of the objects assembly and biological cells injection, is designed and modeled in this paper. The clamping action of the microgripper with the x direction is completed, however, when anything is clamped by the end effector, which can be completely driven by an actuator generated in y direction, at lastclamping and pushing motion are realized. The flexure hinge, which takes place of the conventional joint, is used as the translational and rotational hinges in the new structure. Otherwise, the whole microgripper is monolithic processing, which can efficiently overcome the disadvantages of the conventional hinge with friction, backlash, anderrors caused by the hinge assembly. Firstly, a kind of novel microgripper is designed in this paper, which can accomplish two-dimensional independent motions including a separate grip and single track push without interfering with each other. The bridge type amplifying structure with two-end output is adopted in the gripper to increase the motion range and the capacity of the microgripper. The piezoelectric actuator with fast response and high resolution is used as the drive element. Secondly, the geometrical and kinematical models are established and the formulas of the amplifying ratio, stiffness, maximum stress, and the natural frequency of this model are calculated, respectively. Finally, the FEM (finite element modeling) based on ANSYS software is built up to validate the formulas.

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Kajian Analisis Struktur Jembatan Gantung Pejalan Kaki Asimetris Ganda (Hal. 32-42)

RekaRacana: Jurnal Teknil Sipil ◽

10.26760/rekaracana.v4i4.32 ◽

2018 ◽

Vol 4 (4) ◽

pp. 32

Author(s):

Altie Santika Arifin ◽

Bernardinus Herbudiman ◽

Gatot Sukmara

Keyword(s):

Economic Development ◽

Modeling And Analysis ◽

Bridge Type ◽

Asymmetric Configuration

ABSTRAKKeberadaan jembatan sangat membantu perkembangan ekonomi penduduk, karena terhubungnya satu wilayah dengan wilayah lainnya. JUDESA (Jembatan Untuk Pedesaan Asimetris) adalah jembatan gantung yang dikembangkan oleh Puslitbang Jalan Jembatan, didesain tipikal dapat mengakomodasi kebutuhan panjang jembatan dengan bentang 30 m hingga 120 m. Terdapat dua tipe JUDESA yaitu asimetris tunggal dan asimetris ganda. Penelitian ini mengkaji JUDESA asimetris ganda dengan bentang 120 m. Perubahan geometrik pada jembatan gantung memberi efek yang signifikan dalam aspek kekuatan struktur. Pada penelitian ini diajukan alternatif konfigurasi batang penggantung dengan menggunakan dimensi dan mutu yang sama. Konfigurasi 1 menempatkan batang penggantung dengan jarak 2m sepanjang setengah bentang dan konfigurasi 2 menempatkan batang penggantung sepanjang bentang dengan jarak pisah 4m. Pemodelan dan perencanaan jembatan gantung menggunakan SAP2000 ver.20. Dari hasil pemodelan dan pengecekkan, didapatkan konfigurasi model 2 menunjukan perilaku struktur yang lebih baik dengan beberapa parameter yang dijadikan acuan.Kata Kunci: jembatan gantung, asimetris ganda, konfigurasi batang penggantung ABSTRACTThe existence of the bridge is very helpful economic development of the population, because the connected one region with other areas. JUDESA (Jembatan Untuk Pedesaan Asimetris) is a suspention bridge that developed by Puslitbang Jalan Jembatan, designed to accommodate a tyipical bridge with span 30 m to 120 m. In this study will analysis double asymmetrical bridge with span 120 m. Changes of geometric have a significant effect on the suspention bridge. Type 1 have the configuration that hanger placed in every 2 m on the half-sapan. Type 2 have the configuration that hanger places ini every 4 m along the span. This suspention bridge modeling by used SAP2000 ver. 20. From the modeling and analysis, type 2 shows that configuration give the better structure performance with the parameter that used.Keywords: suspention bridge, double asymmetric, configuration of hanger

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