Asymptotic research of deformations and stresses of the ring that sustains the seam of elliptic bottom and conic shell

In the paper, we consider stress-deformed state of elastic system that consists of the elliptic bottom, the ring, and the conic shell. The ring is under arbitrary load, which acts in its plane.On the base of the principal differential dependencies of design of the planar circular ring, we obtain the expressions for tensions, momentum, and the angle of rotation of lateral section.

Calculation of the Vehicles Stress-Deformed State while Transporting the Liquid Cargo

To calculate the stress-deformed state of road-tanker metal structures during the liquid cargo transportation, the solution for bending axially and symmetrically loaded circular plates is proposed, which is based on the theory of elasticity approach. Dependencies for calculating stresses and displacements under arbitrary load law and support type are substantiated. Deformation of the support under the action of axisymmetric loading leads to appearance of a temperature field.

Designing 6–18 GHz Microstrip Filters with Removing Unwanted Upper and Lower Band Frequency Responses and with Arbitrary Load Impedance Matching

In this paper, Ultra-Wideband (UWB) filters at 6–18[Formula: see text]GHz are designed that can reduce undesired frequency responses at lower and upper frequency bands to less than [Formula: see text]20[Formula: see text]dB. Arbitrary load impedances are considered in the design of these filters. The structure of these filters is the combination of microstrip band-pass filters and Defected Ground Structures (DGSs) with multiple sections. The optimum circuit dimensions are calculated using a computer code which implements the Least Mean Squares (LMS) optimization method. Two design examples are included to illustrate this method. In these examples, eight-section DGS structures are employed to eliminate the unwanted upper frequency band responses. To ensure the correct performance of the designed filters, they are analyzed using full-wave methods and fabrication and the results of the measurement or full-wave analysis shows good agreement with the results of the computer code and the circuit model simulations.