Investigation of Band-Pass Filters of K-Range on Rectangular Concentric Resonators

Introduction. Simple-shaped cavity resonators: rectangular, cylindrical and coaxial, are widely applied in modern microwave engineering in design of different functional devices of middle and high power levels. Parameters of resonators can be obtained analytically by using expressions from literature. Concentric resonators, performed on the basis of classical simple-shaped cavities with a central metallic core represent a new class of electrodynamic systems of microwave range, the properties of which remain poorly studied. One of these structures, named a rectangular concentric resonator (RCR) is proposed in the paper as a basic unit of K-band bandpass filters (18...26 GHz).Aim. To study potential possibilities of RCR for creation electromagnetic signals filtration devices of micro wave range.Materials and methods. The finite element method implemented in the package COMSOL was used to investigate electrodynamic characteristics of RCR and scattering matrix parameters of the microwave filters on RCR basis.Results. Simple polynomial expressions for computation of normalized resonant wavelengths of RCR were obtained at the first stage of modeling. Next, two models of passband microwave filters by RCR with different sizes were built and their EM characteristics were studied. Cavities sizes were determined numerically and practical recommendations on the realization of a new type bandpass microwave filters were formulated.Conclusion. New results of the finite-element analysis of spectral characteristics of two models of bandpass Krange filters on rectangular concentric resonators were represented. The advantages of the filters were indicated. Simple analytical expressions for calculation of the resonance wavelengths of the considered concentric resonators were obtained.

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Finite Element Analysis of Drum on the New Type Self-Driven Towing Machine for Cable

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.55-57.664 ◽

2011 ◽

Vol 55-57 ◽

pp. 664-669

Author(s):

Jin Ning Nie ◽

Hui Wang ◽

De Feng Xie

Keyword(s):

Finite Element Analysis ◽

Finite Element ◽

Stress Analysis ◽

Compressive Stress ◽

Wire Rope ◽

Ansys Software ◽

Element Analysis ◽

Structure Improvement ◽

Improvement Measures ◽

New Type

According to the situation that the dual-friction drums on the new type towing machine lack stress analysis when designed, the safety is difficult to test and verify. The pull of wire rope in various positions was derived and calculated, so both compressive stress and tangent friction force generated by the pull of wire rope were calculated. The result made by ANSYS software demonstrates the safety of the left drum which suffers from larger loads, structure improvement measures are put forward for the drum.

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The Finite Element Analysis and Optimization of Micro Free Piston Swing Engine’s Strain Interference

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.139-141.938 ◽

2010 ◽

Vol 139-141 ◽

pp. 938-942

Author(s):

Ji Jing Lin ◽

Yan Hong Chen

Keyword(s):

Finite Element Analysis ◽

Finite Element ◽

Internal Combustion Engine ◽

Combustion Engine ◽

Internal Combustion ◽

Computation Method ◽

Element Analysis ◽

Free Piston ◽

New Type ◽

Swing Engine

MFPSE, Micro Free Piston Swing Engine, is a new type of miniature internal combustion engine based on the working principle of two-stroke swing engine. The successful development and operation of this type of miniature internal combustion engine provide important significance for the miniaturization of the internal combustion engine, and provide a number of important research theory, computation method and experimental data. In this article, according to the work characteristics and co-ordination requirements of MFPSE (Micro Free Piston Swing Engine), whose strain interference is analyzed using finite element analysis software, the problems and interference of the center pendulum and cylinder is found evidently. The data of analysis provides theory basis for the MFPSE’s structural optimization, and is critical to improve the performance of MFPSE.

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Microwave filters on cavity resonators

Achievements of Modern Radioelectronics ◽

10.18127/j20700784-202106-05 ◽

2021 ◽

Author(s):

V.V. Komarov ◽

S.K. Bushanskiy ◽

A.O. Churkin

Keyword(s):

High Power ◽

Electromagnetic Waves ◽

Complex Shape ◽

Microwave Filters ◽

Electronic Systems ◽

Microwave Range ◽

Cavity Resonators ◽

Electromagnetic Characteristics ◽

Technical Solutions

Waveguide and cavity microwave filters continue to be the most important components of high-power radio electronic systems. Cavity microwave filters are of great interest as a separate group of devices of this type. The fields of application of such filters are constantly expanding, and the variety of their design is quite large. In addition, the requirements for their electromagnetic characteristics and reliability are currently increasing. In this regard, it becomes necessary to analyze the already created designs of these devices and study the main trends of their improvement. The objective of the present study is to review the known technical solutions of bandpass filters, made on cavity resonators of the microwave range. An overview of the designs of devices for filtering electromagnetic waves on cavity resonators with coaxial and waveguide coupling elements of various frequency ranges is carried out. It is proposed to use the configuration of basic resonators as the main criterion for the classification of these devices. In accordance with this criterion, five groups of filters are considered: on rectangular, cylindrical, spherical, coaxial resonators, as well as on resonators of complex shape. The review makes it possible to analyze the features of the implementation of different technical solutions for bandpass microwave filters of medium and high power levels and to identify the main trends in the development of this area of research.

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The Finite Element Analysis of a Heavy Semi-Trailer Frame Based on ANSYS

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.644-650.455 ◽

2014 ◽

Vol 644-650 ◽

pp. 455-458

Author(s):

Yao Ye ◽

Yong Hai Wu

Keyword(s):

Finite Element ◽

Geometric Model ◽

Reference Method ◽

Element Model ◽

Element Analysis ◽

Emergency Braking ◽

The Finite Element Analysis ◽

New Type ◽

Stress And Deformation ◽

3D Geometric Model

Frame has important effects on the performance of the whole of heavy semi-trailer. A heavy semi-trailer frame is analyzed and researched on in the finite-element way in this article. The frame of 3D geometric model is established by using Pro/E. And it was imported into the Hypermesh to establish frame finite element model. Frame are calculated by using ANSYS solver in bending condition, emergency braking conditions and rapid turn conditions of stress and deformation conditions. The computational tools and methods we used provide the new type of frame and development with a reference method to refer to in this paper.

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Improvement and FEA of New Type of Osteointegrated Implant for Higher Amputated Leg Attachment

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.342-343.829 ◽

2007 ◽

Vol 342-343 ◽

pp. 829-832

Author(s):

J.M. Luo ◽

L. Zheng ◽

X.H. Shi ◽

Yao Wu ◽

Xing Dong Zhang

Keyword(s):

Finite Element Analysis ◽

Finite Element ◽

Distal Part ◽

Element Analysis ◽

Bone Stress ◽

Traditional Design ◽

Maximal Stress ◽

New Type ◽

Scan Data ◽

Leg Prosthesis

Stress concentration is one of the main mechanical problems leading to the failure of clinical application for osteointegrated implant of percutaneous osteointegrated prosthesis, which is especially marked for higher amputated leg prosthesis. Traditionally design was composed of only the distal part. To improve the biomechanical safety, a new design with the lag part similar to the lag screw was introduced. Based on CT scan data, relatively accurate model of femur for finite element analysis (FEA) were obtained. The FEA results with the new implant demonstrated that compared to traditional design, the declination of bone stress peak ranged from 15.68% to 28.67%, perpendicular deformation from 34.73% to 72.16%, and maximal stress of implant from 14.51% to 23.36% with the increasing of loads from 3750N to 2000N. So the new design of osteointegrated implant would be more secure mechanically, in the case of higher amputated leg attachment.

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Effects of Ultrasonic Motor Stator Teeth Height on Start Reliability

Energy Harvesting and Systems ◽

10.1515/ehs-2014-0028 ◽

2015 ◽

Vol 0 (0) ◽

Cited By ~ 1

Author(s):

Wei Zheng ◽

Jing-Liang Zhou ◽

Yu-Zhen Ruan

Keyword(s):

Finite Element Analysis ◽

Finite Element ◽

Traveling Wave ◽

Ultrasonic Motor ◽

Wave Type ◽

Element Analysis ◽

Factors Affecting ◽

Ultrasonic Motors ◽

Wide Range ◽

New Type

AbstractAs a new type of motor, the traveling wave type rotary ultrasonic motors (TRUM) have a wide range of applications. However, the friction between stator and rotor leads to its poor start reliability, which retards the progress of application of ultrasonic motors. Sometimes TRUMs which are widely used cannot start after storage. Height of tooth of the ultrasonic motor’s stator is one of the factors affecting TRUM’s start stabilizing. In this paper, combined with the ultrasonic motor running mechanism, the factors that affect TRUM’s start reliability are studied. Model of ultrasonic motor stator tooth height is analyzed by finite element analysis (FEA). Five TRUMs with different tooth heights are fabricated and measured. A TRUM with 1.85 mm tooth height can start properly in humidity 90%, but ultrasonic motors with 1.8–1.9 mm tooth height cannot start properly under the same conditions.

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Finite element analysis of floor slab of new type assembly structure system

E3S Web of Conferences ◽

10.1051/e3sconf/202127202017 ◽

2021 ◽

Vol 272 ◽

pp. 02017

Author(s):

Xiaomeng Zhang ◽

Weilun Ding ◽

Qingying Ren ◽

Wenting Liu ◽

Qiaji Wang

Keyword(s):

Mechanical Properties ◽

Finite Element Analysis ◽

Finite Element ◽

Concrete Structure ◽

Hysteresis Curve ◽

Element Analysis ◽

Structure System ◽

The Finite Element Analysis ◽

Assembly Structure ◽

New Type

In this paper, a new type of prefabricated concrete structure system is put forward, and a new type of bi-directional multi-ribbed floor is put forward in combination with this system.Finite element analysis is carried out on the floor, and its mechanical properties are analyzed, and compared with the test hysteresis curve, the rationality and correctness of the finite element analysis are obtained.

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Analysis of Dynamic Behavior of Ultra-High Voltage Porcelain Arresters with New Type Lead Dampers

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.625.61 ◽

2012 ◽

Vol 625 ◽

pp. 61-68

Author(s):

Xue Song Zhang ◽

Ze Bing Dai ◽

Zhi Cheng Lu ◽

Cheng Chen Cui

Keyword(s):

Finite Element Analysis ◽

Finite Element ◽

Theoretical Analysis ◽

Dynamic Behavior ◽

Relative Displacement ◽

Element Analysis ◽

New Type ◽

Maximum Root ◽

Root Stress ◽

High Voltage Porcelain

Dynamic behavior of the 1100kV porcelain arresters with and without the new type lead dampers and are investigated，based on theoretical analysis and finite element analysis. The results of theoretical analysis show that the dynamic response of 1100kv porcelain arrester can be decreased by damping measures, which can change the dynamic behavior of equipment. The results of finite element analysis show that the primary frequencies of these two structures are between 1Hz and 10Hz and the differences between them is not obvious, which indicated that the overall stiffness of the two structures is low and the frequency and vibration mode of these two structures have hardly been changed by the lead dampers. The level modes dominated the equipment, while vertical modes and torsional modes are not obvious. Owning to an effect of increment of damping device with the new type lead dampers, there is a reduction by 40% above in the maximum root stress of porcelain bushing. In the meantime, the new type lead dampers can also decrease the relative displacement at the top of equipment.

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