Design and Simulation of Side Rail Strength and Latch Reliability for Medical Beds Testing Using FluidSim

Abstract. In order to effectively prevent and control the generation and development of rail corrugation, according to the actual line condition of the small radius curve section, the vehicle (with flexible wheel sets)–track space coupled model was established by using the multi-body dynamic software UM (Universal Mechanism), which could consider the coupled relationship in three directions of space, and the dynamic analysis for the corrugation section was carried out by using the model. Then, based on the theory of friction self-excited vibration, the three-dimensional model of a wheel–rail system was established by using the finite-element software ABAQUS, and the complex eigenvalue analysis of influence factors of rail corrugation was conducted based on wheel–rail contact parameters obtained by dynamic calculation. Through the stability analysis of the wheel–rail system with different fastener vertical and lateral stiffnesses, friction coefficients, and superelevation states, we find that properly increasing the fastener vertical and lateral stiffnesses, controlling the wheel–rail friction coefficient below 0.4, and keeping the balanced superelevation state of the track structure can effectively reduce the occurrence possibility of unstable vibration of the wheel–rail system, thus inhibiting the generation and development of rail corrugation. The excess superelevation state of the track structure results in the unstable friction self-excited vibration of the wheel–rail system at the inner wheel–inner rail, while the deficient superelevation state results in the unstable friction self-excited vibration of the wheel–rail system at the outer wheel–outer rail, which shows that the superelevation state of the track structure directly affects the formation of rail corrugation and determines the development order of corrugation of inner and outer rails. This conclusion can well explain the cause of corrugation appearing on only one side rail.

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Device Errors Side rail entrapment

Nursing ◽

10.1097/00152193-199705000-00025 ◽

1997 ◽

Vol 27 (5) ◽

pp. 67

Author(s):

&NA;

Keyword(s):

Side Rail

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BED SIDE RAIL COULD DISENGAGE; FATALITIES REPORTED IN CANADA

Biomedical Safety & Standards ◽

10.1097/00149078-198809150-00001 ◽

1988 ◽

Vol 18 (17) ◽

pp. 130

Keyword(s):

Side Rail

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Relatives' perceptions of side rail use on the older person in hospital

British Journal of Nursing ◽

10.12968/bjon.2001.10.6.5349 ◽

2001 ◽

Vol 10 (6) ◽

pp. 391-399 ◽

Cited By ~ 16

Author(s):

Róisín Gallinagh ◽

Rosemary Nevin ◽

Linda Campbell ◽

Fionnuala Mitchell ◽

Ruth Ludwick

Keyword(s):

Older Person ◽

Side Rail

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Molecular Characterization of Escherichia coli O157:H7 Hide Contamination Routes: Feedlot to Harvest

Journal of Food Protection ◽

10.4315/0362-028x-69.6.1240 ◽

2006 ◽

Vol 69 (6) ◽

pp. 1240-1247 ◽

Cited By ~ 24

Author(s):

K. D. CHILDS ◽

C. A. SIMPSON ◽

W. WARREN-SERNA ◽

G. BELLENGER ◽

B. CENTRELLA ◽

...

Keyword(s):

Escherichia Coli ◽

Drinking Water ◽

Gel Electrophoresis ◽

Side Wall ◽

Pulsed Field Gel Electrophoresis ◽

Marker Genes ◽

Escherichia Coli O157 ◽

Pulsed Field ◽

E Coli ◽

Side Rail

This study was conducted to identify the origin of Escherichia coli O157:H7 contamination on steer hides at the time of harvest. Samples were collected from the feedlot, transport trailers, and packing plant holding pens and from the colons and hides of feedlot steers. A total of 50 hide samples were positive for E. coli O157:H7 in two geographical locations: the Midwest (25 positive hides) and Southwest (25 positive hides). Hide samples were screened, and the presence of E. coli O157: H7 was confirmed. E. coli O157:H7 isolates were fingerprinted by pulsed-field gel electrophoresis and subjected to multiplex PCR procedures for amplification of E. coli O157:H7 genes stx1, stx2, eaeA, fliC, rfbEO157, and hlyA. Feedlot water trough, pen floor, feed bunk, loading chute, truck trailer side wall and floor, packing plant holding pen floor and side rail, and packing plant cattle drinking water samples were positive for E. coli O157:H7. Pulsed-field gel electrophoresis banding patterns were analyzed after classifying isolates according to the marker genes present and according to packing plant. In this study, hide samples positive for E. coli O157:H7 were traced to other E. coli O157:H7–positive hide, colon, feedlot pen floor fecal, packing plant holding pen drinking water, and transport trailer side wall samples. Links were found between packing plant side rails, feedlot loading chutes, and feedlot pens and between truck trailer, different feedlots, and colons of multiple cattle. This study is the first in which genotypic matches have been made between E. coli O157:H7 isolates obtained from transport trailer side walls and those from cattle hide samples within the packing plant.

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Age, Side Height, and Spindle Shape of the Crib in Climbing over the Side

Perceptual and Motor Skills ◽

10.2466/pms.1997.85.2.667 ◽

1997 ◽

Vol 85 (2) ◽

pp. 667-674 ◽

Cited By ~ 3

Author(s):

Marcella V. Ridenour

Keyword(s):

Minimum Distance ◽

Side Rail ◽

Actual Height

The crib is the only infant product in which a consumer, such as a parent or caretaker, is encouraged to leave the infant unattended, usually alone in the bedroom, while the infant is sleeping or going to sleep or waking. Given frequent falls from the crib, federal crib regulations have set the minimum distance between the top of the mattress support and cop of the crib side rail as 26 in. and this height must include a 6-in. thick mattress. When a mattress is used with the crib, the actual height of the crib side as a barrier is 20 in. These crib regulations also require instructions for the caretaker to discontinue using the crib when the child's height is 35 inches. These federal crib regulations attempt to create an escape-resistant sleeping environment for all children who are less than 35 in. tall. Of 144 children between the ages of 12.5 and 36.5 mo. observed while attempting to climb out of a crib, who also had standing heights of less than 35 in., many were able to climb from cribs with side rail heights of 26 in. When the crib side-rail height was raised beyond the minimum of 26 in., the frequency of children climbing over the crib rails decreased.

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