The energy absorbing capability is one of the most important aspects of crushing behavior of a structure subjected to axial impact. In this paper, a simple practical method is introduced to enhance the crushing behavior of this kind of structure. The axial impact of metallic energy absorbing thin-walled tubes with special shaped cross-section is simulated using LS-DYNA software. The effect of c...

In this research, the interaction conditions for double-symmetric I-sections without fillets are analysed. Interaction necessary determination of plastic load-bearing capacity, which is preferred over elastic capacity economic reasons. literature, standards and current research projects, different My, Mz Mω available. However, analyses their accuracy missing. This intends to determine deviation...

The measurement accuracy of a magnetic gradiometer relies on magnetometer consistency, accuracy, and assembly technology. traditional methods calibrate error, misalignment the interference field independently. However, after long time work, calibration parameters will inevitably change. Furthermore, it waste lot manpower material resources if is disassembled calibrated step by step. Given above...

A very simple, constrict, cross-shaped slot loaded wideband rectangular microstrip patch antenna is demonstrated in this communication. Rectangular patch with a cross ( ) shaped slot is radiating element. The probe feed technique is used for this shape. The selected antenna is simulated using IE3D simulator, 12.28 version of Zeland. Wideband characteristics of antenna are shown in simulated res...

A two-dimensional numerical model is used to study the response to upwellingand downwelling-favorable winds on a shelf with a strong pycnocline. During upwelling or downwelling, the pycnocline intersects the surface or bottom, forming a front that moves offshore. The characteristics of the front and of the inner shelf inshore of the front are quite different for upwelling and downwelling. For a...

In this paper, we have investigated a printed modified circular disc monopole antenna with cross-shaped slot in radiating patch for UWB applications. The proposed antenna covers the entire UWB band (i.e., 3.1GHz to 10.6GHz) except the frequency band of IEEE 802.11a (i.e., from 5.15GHz to 5.83GHz). This UWB antenna will be of use in environments where IEEE 802.11a WLAN devices are already in ope...